Oil Leaking From Bottom Of Boat Motor


White smoke indicates either water vapor from dirty fuel, a water leak into the cylinder or atomized, but completely unburned, fuel. show contact info. Also it could be the upper vertical DS seals. vertical position, oil level should be within 1/2” from the bottom of the filler hole. I have noticed a small amount of oil leaking from the cooling intake ports of my 1998 Honda 90-HP after it is in the full up (trailer) position for a few days. The engine block performs a number of functions, including assisting with the pumping of water from the radiator to the different parts of the engine to cool them down; housing pistons in several cylinders that move the vehicle's crankshaft; sealing in the lubricating oil via the oil pan attached to the bottom, and acting as the housing for. Followed all rules, never running it above 4K rpms. Engine seems to be running fine. outboard boat motor. If the motor is running hard enough to plane the boat, water that otherwise cools the oil isn’t splashing on the sump that holds the oil. After I blew up the engine I found out about reversion. Drainzit oil drain hoses allow you to change the oil in your small, gas and diesel powered engines without tipping, dismounting, or modifying your engine in any way. Collapsing bottom radiator hose: Occasionally, a bottom radiator hose begins to collapse under the vacuum that the water pump creates, and the impaired circulation causes overheating. Has any one noticed oil slowly leaking from the bottom of their DRZE motor? I cant quite figure out where it is coming from other than the seem that runs the length of the engine. Gas getting into oil becomes a cause for concern when the volume of gas exceeds 2. Always verify the origin of an oil leak by using Some vehicles equipped with the Romeo built 4. Any recommendations?. If available, mount the engine on an engine stand. I cleaned it up and ran the boat for an hour and did not find any new oil. Can i use different 2 stroke oil in gas or better oil in bottom end to keep it running. The tool is supplied with reusable 10 15 & 22mm seals that have a recessed step moulded in every seal to fit copper fittings. Oil not checked regularly during the season but sometimes (but only about 30% of the time) when the engine is taken out there is a small leak of oil out of the through-the-prop exhaust port showing on the bottom of the locker - about a teaspoon full. Consult your outboard owner's manual (which I hope you've read, or at least saved somewhere) for the exact oil check routine for your motor, because each brand and model is a little different. Oil is available at marine dealers or even Canadian Tire. 7 liter Vortec) with 130,000 miles that has developed a leak around the upper oil cooler line fitting where it enters the radiator on the driver's side. As the motor is used the high temperature in the crankcase causes this oil and gas mix to evaporate and those expanding gases create the pressure required to squeeze it o. After draining all the oil old oil out, replace the washers that should be on the drain plugs. (NOTE: This is assuming what you're seeing is in fact ENGINE oil) There are multiple gaskets and seals that exist on a modern automobile that can provide points of leakage, especially as a car ages. Doing so will ensure the safe operation of your steering system and will any fault/leak will show at this time. Can't be a big leak (yet) because over the course of the summer (about 50hrs) I am not seeing any oil in the bilge, just collecting on the front/bottom of. is there a seal that I can change or do I have to take it to the shop!. In fact it's very common for air leaking engines to start and idle very nicely. i got in bilge yesterday and found this. Leaking oil, however, could be a sign that something is seriously wrong with your car's engine. StP Engine Oil Stop Leak 300ML. Oil leaks, a good friend and skilled mechanic once said “there are two engines in this world that always have oil leaks, one is a Land Rover and the other a Rolls Royce. What happens if a coolant is leaking from the bottom of the engine? It means you have a problem and luckily, you have had warning, unlike a tire blowing out. Is this leaking while tilted or is the tank overfilling? Just to let you know you need to keep track of the foam strainer/seal at the bottom when pulling and replacing the float assembly in that tank. Took it off and re-zip tied. Recognizing the symptoms of glycol in engine oil. Inspecting Marine Gasoline Engines Some simple tricks to help you evaluate your engine's condition and head off trouble before it gets started. 0 Severe oil leak? Hi, Sorry if this isnt posted in the right place! I have a 3. And worst of all, engine oil leaks are a fire risk in your engine compartment and can result in catastrophic engine failure at the worst possible time, not that there is a good time for catastrophic engine failure. Sue, I'm not sure about your engine size, but the 3. I have gear lube on the side of engine and in the bilge. Find the actual problem and fix it. When I first turned it over, I had t. change in owners. needed in the event of theft or to quickly identifying the outboard motor type. Inspect the hoses, too. More at the corner where the engine bolt is to the front of the motor. It is normal for a small amount of water to accumulate in the. This is usually because the oil is leaking INTO your coolant system, rather than out onto the ground where you would expect to see it. The oil dripping from the lower unit where the exhaust comes out is a new issue. Engine oil and the importance of good lubrication. 10 Ft Jon boat, Flat Bottom, Registered, Electric 55 lbs thrust Minn Kota, 665 CCA Deep cell Die Hard Battery. Am I overlooking something, or has anyone else encounted s. Use a motor oil specifically formulated for the rigors of the marine environment, like Yamalube ® 4M for four-stroke outboards, and Yamalube ® 2M for two-stroke outboards. Check for bad hoses or clamps on your exhaust , the exhaust has oil in it and when a hoses leak or the water box wears a hole in it etc the exhaust and water with oil will get in the hull. show contact info. Oil is available at marine dealers or even Canadian Tire. The last oil change I used Pennzoil high mileage dino 10w40 and bottle of bars leak concentrated rms leak and after 4 weeks still no leaks. Founded by Johnny Morris, the same man who founded Bass Pro Shops, in 1976, Tracker Marine made boating history when he brought the first fully rigged boat, motor and trailer to the boating market. I'm running it in my steering, jack plate, and PTT now with no problems. Thread starter TechHead87; The leak comes from the right side of the engine. but its very small. I can't tell where its coming from. Note that thin oil also tends to leak out faster & leak water in faster, this is especially the case in worn gearcases. In the long term, it might also save money and repair time for the new owner. 2 days ago · Small aluminum boat. Hi folks, 2. • Never allow anyone to operate this boat until they too have read the Owner’s/Operator’s Manual. 00) and he told me the carb. It has a constant leak and every few months needs more oil. could that be a source of oil leak. Outboard boat motors are notorious for problems. 273644 Lawn Tractor -- Last night the tractor started leaking oil from the bottom of the engine. White smoke indicates either water vapor from dirty fuel, a water leak into the cylinder or atomized, but completely unburned, fuel. Oftentimes, an engine that is running excessively rich, or has a weak ignition system, will appear to be leaking gear oil, when in reality, it is simply unburned fuel running down the exhaust and. (Oil suction pumps can be found at most auto parts stores. Here are some other leaks that will fill your valley with oil. Most air leaks draw a very minute amount of air at low engine speeds. Secondly, some set ups are prone to excessive water pressure problems in the engine block as high pressure is taken from the jet drive and routed into the engine cooling system. The engine is leaking oil. Drainzit hoses are custom-designed to be easy to use and install. The most common problem with both two- and four-stroke engines begin with the fuel system. Our Mechanics Make House Calls. The oil dripping from the lower unit where the exhaust comes out is a new issue. This is an oil drain hose. Some smoke came out when i first started it and everything was ok. The most common leaks found in an engine are intake manifold gasket leaks. The boat is stored in an unheated barn. There will probably be debris and sediment at the bottom of the VST that will become suspended in the fuel and can clog the new VST filter once the tank is refilled with fuel again. Last week the engine started leaking a little bit of oil when i trim it up. The engine used to spray out a little fuel when it was choking and there was always a little bit of fuel in the channels of the intake covers. What Makes an Inboard Gasoline Engine Different? Your boat’s inboard gasoline engine can have between 90 Horsepower and 1000 horsepower depending on the engine. I had the boat in a lift this weekend with the cowl off. If the shaft seal is out will it pump oil up the midsection?. The engine has 100 hours on it of which i have put 60 hrs this summer. Over the weekend I was able to get down in the engine room with a camera to try and track down the source of an ongoing oil leak from (now) both engines. Motor has hook up to charge a battery Fish finder. Most of the leaks come from seals and gaskets that have aged and are no longer doing their job. I have left the car at a local dealership for a coolant leak and the service adviser has mentioned before and has personally shown me a engine oil leak from the bottom engine seal/gasket, I have received a estimate of near 4 grand to repair this leak. Using the right type of oil and fuel is critical for both performance and lifespan. Clean Paint, No leaks or cracks. Hi, My oil pan has started leaking from around the drain plug due to some corrosion and needs swapping out, has anyone done this job?, just wondered how many hours to do it and if i can do it without pulling the motor out, also looking for best place to buy a new oil pan, should i just go to volvo or is there other options?, My boat is a 2008 256SSX with 5. Suttle said the company is planning to collect leaking oil on the ocean bottom by lowering a large dome to capture the oil and using pipes and hoses to pump it into a vessel on the surface. Frosty Previous Member. The most common leaks found in an engine are intake manifold gasket leaks. The quad had a bad leak from the carb overflow which indicated that the float needle valve was blocked or passing so I replaced this and put everything back together. The head bolts on many engines thread into the coolant passages. If you see signs of leaking, it’s best to get an oil leak fix in Livonia at Ralph Thayer Automotive as soon as possible. e is leaking alor of oil I need to know asap how to fix. Blue or white smoke coming from your engine usually indicates burning oil, which can be caused by: Overfilling the crankcase with oil. Another common cause of oil leaks is a cracked, degraded or loose valve or oil pan gasket. Understanding them and treating them carefully helps lengthen their life, saving money and long trips poling, paddling, or drifting home. I have no idea where the oil is leaking from. Outboard engine lower unit leaks often result from a broken propeller seal. However, it does have some sort of oil leak at the bottom away from the oil pan. Leaking oil from bottom of my car engine. Air Cleaners & Accessories. There is usually an O-ring seal below the plastic plenum and oil accumulates in the gap. Refill the engine with the appropriate oil based on manufacturer’s recommendations. If the oil leak is coming from the bottom of the engine, near the base, it is likely because of a problem in the oil tank or oil sump. This can be the result of worn piston rings, valve guides, or oil seals. The bottom of the engine is soaked with the oil. If you discover some wetness at that point, you should monitor the vehicle closely for increased oil loss. Why does it leak. doesn’t show signs of oil leak in the engine area. Bottom line isafter I burped some air out of it, the motor performed flawlessly all Memorial weekend at Silver Lake - Sand Dunes. If the pan is damaged or if the gasket fails it can leak oil around the pan itself. i had asked a mercury machanic online (cost me $40. Here are some other leaks that will fill your valley with oil. Engine oil and the importance of good lubrication. Mercruiser 350 leaking manifolds Does the exhaust manifold have a waterjacket - not too sure of these engines. Basically, everything I showed you here is in the manual word for word. I cleaned it up and ran the boat for an hour and did not find any new oil. When you ran it on a hose, the motor was not run hard enough to burn off the excess so some of it came out with the exhaust. change in owners. I've found a problem 3 years ago and Kawasaki told me it is a maintenance problem and screwed me out of appox. Outboard boat motors are notorious for problems. 9hp Mercury 2-stroke motor. Besides leaving stains on the pavement, an oil leak can even pose a fire risk for your car’s engine. Is this normal or something I need to give some attention. 9hp are reliable, compact outboard engines. After I had parked the boat I have noticed a fairly sustantial (larger than a shop rag will cover) amount of oil on the ground under the outboard. I have Oil leaking at base of motor under the black plastic piece located in the front of the engine. But boats that are run at non-planing speeds may not heat the oil up very much at all. Took it to a shop who told me it was the oil drain tube that was leaking at the bottom of the oil pan. When the motor is running, oil is getting pumper ANF used so the overflow issue is somewhat muted. They started it at the dealer. Small amounts of water continually collect in the oil from condensation on the cold metal inside the engine in the morning, at a minimum; also any combustion products that get past the piston rings. If the level is full there is a problem with the pump. i had asked a mercury machanic online (cost me $40. For a fix to the leaking oil tanks & caps on Mercury outboard 2-strokes check out www. Serial Number : To You, Our Customer Thank you for selecting a TOHATSU outboard motor. There should be evidence of water in the gear lube when you drain it after running it on a boat if there is a gear lube leak. The coolant spills into the bottom end of the engine. check levels and change lower unit oil then keep. Tohatsu outboards were originally developed for commercial Japanese fishermen who needed a motor that could run for days on end, no matter what the weather. Common problem on later model 2 cycles. However I believe the leak occurs when the engine is running (under oil pressure) and simply shows itself more apparently when at rest (sfter pooling occurs in the pan). That is just some oil that drips down the exhaust pipe after the motor was winterized which injects extra oil into the motor to prevent rust and corrosion. I have no idea where the oil is leaking from. It looked like motor oil. Mercury Outboard Oil Tank Bracket Base 42888 (B8F-6) oil tank base #42888~Mercury Marnier 1987-1998 65-125 HP outboard motor~694 See more like this. Oil changers who are not aware of its importance may think it's OK to re-use this washer. Just did an oil change today at 109k miles and spotted an oil leak that wasn't there 5k ago. An early warning is the loss of engine coolant. For this reason, outboard motor maintenance is a key part of owning a boat. Restart the engine and check for an oil leak. There are two main categories of marine outboard engines: two-stroke and four-stroke. boat was still on trailer! I took out the top oil plug on the lower unit and no oil came out. From time to time your bike may develop oil leaks. if it leaks while sitting: the leak is coming out of the bottom half of the engine, most likely oil pan or drain plug which are easier fixes. A blown head. com for "Merc BUDDY". A common Issue with 4 stroke Seadoo Watercraft is an oil leak at mid to high RPM that makes spotting the location of the leak difficult. External leaks can be seen with the naked eye or by using dyes. Farmall Radiator Bottom Cast Iron Welding. Page 33 Safety Inspection Look around the outboard motor for signs of oil or gasoline leaks. First, they forgot to seal the exhaust and almost sank my boat. 2 days ago · Small aluminum boat. This article deals primarily with sailboat leak problems. Internal problems that cause oil to leak through a lawnmower's air filter typically require repair by a small-engine specialist. vertical position, oil level should be within 1/2” from the bottom of the filler hole. Engine oil, or "motor oil," may vary in color from light amber to dark brown, depending on how well you maintain your car. B&S V Twin 30 hp commercial engine leaking oil I have a friend with a Scag Freedom Z with a 30 hp Briggs & Stratton V twin with cyclonic air filter that has a oil leak. Common problem on later model 2 cycles. The system check MUST be completed after installation. The premiere small engine manufacturer of America and the world, Briggs & Stratton has made a brilliant move building a 5 hp four-cycle outboard motor. Can be as simple as tightening a bolt or filter. To make the long story short, I took my boat out of storage yesterday and found a pool of oil on the floor of the engine compartment. Light weight. Prestone® is the number one branded consumer choice for antifreeze/coolant, brake fluid and power steering fluid in North America. No leaks 7. Reading through the claim files, you get the uneasy sense that most skippers didn't have a clue their engines were developing a serious problem until the minute that they sputtered and died. But a non water-proof seal between manifold and its cooling jacket would give you milky oil. No trailer. Your oil drain plug screws into the bottom of your engine's oil pan. I can't tell where its coming from. Using the right type of oil and fuel is critical for both performance and lifespan. Troubleshooting tips: Water in lower unit, Mariner gear case oil leak, Mercury outboard lower unit, Mariner gear case rebuild, Mercury outboard gearcase, Mariner gearcase lube, Mercury lower end rebuild, Mariner lower unit parts, Mercury outboard propeller seal, Mariner lower unit diagram, Mercury lower unit seal, Mariner lower. Oil leak on bottom of engine I’m trying to find out if there’s a oil plug that came loose or does a drain pan have a crack in it. If you have run your motor at low rpm without load in cold weather, it is completely normal that unburned black oil drips out of exhaust or drain holes in lower unit afterwards, almost every two-stroke I've had did that. The bottom of the engine is soaked with the oil. As the motor is used the high temperature in the crankcase causes this oil and gas mix to evaporate and those expanding gases create the pressure required to squeeze it o. Many engine gaskets, seals and governor shafts are not designed to handle a pressure, and this will result in an oil leak. How to Find an Oil Leak Outboard motors are manufactured through different methods, and thus each engine tends to be unique. Steve Wheeler from HHB Marine in Hampton, New Hampshire shares a method of making a repair to a leaking marine oil pan using J-B Weld, an old can and some other basic tools. im not sure what the hole is in picture. These materials should give you an understanding of the boat and its operation. It's not a ton of fluid for what it's worth, but it certainly does not look like it's supposed to be there. If there is an oil leak, common sense tells you that it will be under the engine, but it's not always immediately obvious where your engine is located. e is leaking alor of oil I need to know asap how to fix. Add a marine fuel stabilizer to the tank and run the boat to a landing. It's often difficult to spot this slow leak because it won't leave a lot of evidence as to the exact source. Common Oil Leak #6 - 7. When you mix the smallest amount of antifreeze and water with motor oil you end up with a low grade acid that attacks the bearings. Not when the engine is down. Most of the time, the problem is something minor and easy to fix. If you are driving down the road and you notice blue smoke coming from the tail pipe of your vehicle, this is another sign that you may have an oil leak. The spark is strong and the motor runs great I have done compression tests on the 4 cyl they seem fine but have not done a leak down test. Engine oil leak repair cost has a lot to do with where the oil leak is located. Mercruiser 3. I have noticed a small amount of oil leaking from the cooling intake ports of my 1998 Honda 90-HP after it is in the full up (trailer) position for a few days. No problem. It still leaks when tilted forward. Made of heavy-duty stainless steel. The motor came with our recently purchased yacht so I'm not familiar with 2 strokes. If the shaft seal is out will it pump oil up the midsection?. e is leaking alor of oil I need to know asap how to fix. I know Yamaha came out with the "Speedy sleeve" to correct this issue. The tendency of the viscosity of the oil to change with temperature is called its viscosity index and viscosity index improvers are used to adjust this index to make the change in viscosity small enough throughout the car's normal range of temperatures that the oil will be useful whether your car is just being started on a winter morning or driven at engine temperatures of over 200 degrees. It is running down from under the lower enclosure and down the midsection. Updated: March 27, 2019. the engine block, leaving you with an engine that can not even be rebuilt. These materials should give you an understanding of the boat and its operation. We have that covered too. Most of the time, the problem is something minor and easy to fix. One way to know that you've gone far too long without an oil change is that oil is leaking from your engine. With a helper holding the engine steady, remove the wedge supports, lower the engine and reconnect the mountings loosely. Water in motor oil can cause serious damage to your engine – the oil will be denatured and no longer effectively cooled. Is this leaking while tilted or is the tank overfilling? Just to let you know you need to keep track of the foam strainer/seal at the bottom when pulling and replacing the float assembly in that tank. Prestone® is the number one. Watch the oil level in the helm pump when the steering wheel reaches either hard over position. Man! Now it looks to be leaking from the hose that goes under the engine on the port side of the boat. Refill the engine with the appropriate oil based on manufacturer’s recommendations. Intake manifold gaskets are responsible for sealing the intake manifold against the cylinder head(s). Check the engine for signs of coolant or oil leaks. The causes of cylinder head oil leaks, stretched studs, leaky gaskets and a number of recommendations for various sticky products to help with these problems Halite head gaskets and torqueing up. It appears that my gear lube reservoir is leaking. Is this normal or something I need to give some attention. Most outboard motor problems that we have faced in our part of Alaska are lower unit problems. Originally, I saw oil pooling up at the bottom of the sensor's wiring and thought to replace the sensor and gasket. Prestone® is the number one branded consumer choice for antifreeze/coolant, brake fluid and power steering fluid in North America. if thats ok then I might want to know if the oil looks milky. Motor is a 1993 40hp Mercury Classic oil injected two stroke. A broken or missing oil filler cap can also lead to leaks. If the oil is black and has a burnt smell that is as expected. Re: Oil leaking from two small holes in lower unit I have checked that out as well. When doing oil pan use the special GM sealant you got at your Cadillac dealer and don't be real cheap its expensive but very good when it comes to plugging a leak as in oil pan, make sure rear main seal replaced and front timing cover seal and finish under engine and flip back over on top side again. changing oil sea ram oil seal in outboard, cost to replace a2006 yamaha trim pumps seal, how much to replace trim and tilt on 2005 225 yamaha, how to replace o ring on tilt anr trim, how to replace seals on 75 hp yamaha outboard motor, oring per trim yamaha top 700, yamaha 250 trim pump, yamaha outboard parts diagram power trim lf 115, yamaha. Most new engines shipped today are four-stroke, however, there are still a large number of two-stroke engines on the water. 00) and he told me the carb. Size: 11-1/4" x 15". Great for aluminum fishing boats, inflatables, sailboats, or as a kicker, the 8hp and 9. It is a seal that prevents leakage and joins the valve cover and the engine. Engine Oil Leak / Leaking Oil Finding oil on the outside of your engine is never a good sign. Oil leaks, a good friend and skilled mechanic once said “there are two engines in this world that always have oil leaks, one is a Land Rover and the other a Rolls Royce. 9hp Mercury 2-stroke motor. Open up an outboard and this—hugely simplified—is what you'll find inside: Fuel burns in the cylinder (or cylinders) to make power. Reply 1: You need someone to look at it to see what is causing. Find the actual problem and fix it. They started it at the dealer. 6L fluorescent dye. I put a real metal clamp on the hose and I'm still getting quite a bit of oil leaking out. Dave: Correct. The drain plug is off to the side and doesn't get everything. The quad ran really well until I took it onto some rough ground to have a ride around, a few hours later the engine started to run really rough as if the engine was flooding. It is very hard to reach , a Cummins 5. All depends on luck. Oil filter and drain bolt is tight. DOWNLOAD 20HP (20HP) Outboard Repair Manual Download a 20HP outboard repair manual in seconds. Is this normal or something I need to give some attention. Restart the engine and check for an oil leak. Live well with drain. Lights work on trailer. Common Signs of Oil Leaks. im not sure what the hole is in picture. Both of these cause your diesel engine to work overtime. I have no idea where the oil is leaking from. Many engine gaskets, seals and governor shafts are not designed to handle a pressure, and this will result in an oil leak. and the exhaust port on the rear of the motor. I previously had a leak from a hole in my airsep which I repaired but am still leaking oil. The engine used to spray out a little fuel when it was choking and there was always a little bit of fuel in the channels of the intake covers. Dave: Correct. If you take your hand and run it down the side of the tank on hull side it probably will come back wet with oil. Clean the outside of. The source of the oil is a fine mist though the PCV system and is generally not a concern. Also it could be the upper vertical DS seals. The pulley on the PTO is full of oil and there is caked crud on the oil filter side of the engine and frame. oil visible on front of oil pan, but clearly coming from higher up on the engine. An oil pan is located at the bottom of the engine and is bolted to the block using many bolts and is sealed using a gasket. In any event, something is leaking, and should not be overlooked. How to Troubleshoot Leaking Oil. Oil Leaks Into the Air Filter in My Briggs & Stratton Lawnmower. Look at the back of a 2 stroke motorcycle. I have a 2005 2500HD 4x4 with the tow package that has a slow leak above the oil filter. Any of these leaks needs immediate attention. If it's thick, black or tan oily liquid: Gear oil may be leaking from a manual transmission, the differential, an axle, or the steering gears. It is most definitely engine oil. Moving down even further, you will get to the gasket that you hope is the source of your oil leak -- the oil pan gasket. When an engine gets an oil leak, the first thing you imagine is that there's a serious problem that is going to be expensive to fix and take hours of work. No motor included. look over engine/hoses/wires 6. Can i use different 2 stroke oil in gas or better oil in bottom end to keep it running. When you mix the smallest amount of antifreeze and water with motor oil you end up with a low grade acid that attacks the bearings. This causes the lubricant to lose viscosity , meaning that the films formed are weaker and less capable of withstanding high loads that can occur at certain points, such as the rod bearings and crankshaft areas. Once you determine you have adequate oil in your engine, it is possible to continue driving in the short term. show contact info. Transom Pad – Protects your transom, cushions motor vibration and reduces noise. The engine is leaking oil. On the bottom side of the primary vent hose adapter, enlarge the two existing 1 mm (. My brothers GT5000 has a major oil leak that I'm guesssing is the bottom oil seal though something seems to have leaking for a while. For our demonstration, we will be using a Snapper SPV21 mower; it is recommended to change this machine’s oil after every 25-50 hours of use. I keep a spare quart in my boat, and I've already had that come in handy when I had a steering hose connection at the cylinder spring a leak. Oil Pan Leak/Pulling Motor Welcome to TheMalibuCrew! As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. Low oil level: A vehicle that’s low on oil tends to overheat because the oil removes from 75 to 80 percent of the “waste heat” in your engine (in addition to doing its other job of cushioning the moving engine parts). The engine has 100 hours on it of which i have put 60 hrs this summer. When an engine gets an oil leak, the first thing you imagine is that there's a serious problem that is going to be expensive to fix and take hours of work. It's always best to treat an oil leak as soon as possible, however, to ensure a larger oil leak doesn't catch you off guard. Boat Export USA - Buy Boats Online - 50,000 + Boats Available for Export Worldwide! Fast, Free Boat Shipping Quote! Boat Export is a full service international boat export company displays more than 10,000 current boats and yachts for sale by owner listings in USA. Fill it from the bottom until oil comes out the top hole then put the top plug back in. When I changed the oil in the bottom end of my mercury 2 stroke outboard there was some water in the oil. One of the simplest and most practical woodworking projects for many folks to begin with is a birdhouse. Conventional motor oil changes are often prescribed for every 3,000 miles. Shop outboard motor accessories at Bass Pro Shops. The intake manifold gasket may develop and external engine oil or coolant leak. Mercury Mariner gearcase diagrams, seal kits, and repair manuals. If it's thick, black or tan oily liquid: Gear oil may be leaking from a manual transmission, the differential, an axle, or the steering gears. Some oil will be passed unburnt into the exhaust.