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Valvoline 4 Stroke Outboard 10W-40 Oil is formulated for both air and water-cooled 4 stroke outboard engines. FC-W oil is mothers milk for four-stroke outboards but it is also recommended for use in four-stroke personal watercraft and gasoline inboards and sterndrives.
During extended trolling an outboard may not reach normal operating temperature and even with modern fuel injection and engine controls unburned fuel in the combustion chamber can condense and migrate past piston rings and contaminate engine oil a situation engineers call.
Four stroke outboard water in oil. Water in the oil is pretty common in small 4 strokes that idle a lot. Lots of info on 4 strokes making oil I always run mine wide open for a while after trolling a lot. When I run wide open to the fishing spot and back on my larger motor that takes care of it.
They dont run warm enough at slow speeds to burn off the condensation in the oil. Discussion Starter 1 Mar 25 2015. I have a 2005 Yamaha 4 stroke 15 hp outboard that recently started getting water in the motor oil.
The motor was acting up the last time that I ran it so I decided it was time for some routine maintenance. The lower unit oil was perfectly golden but the motor oil definitely had water in it. Hi David The only ways I can think of that water could get into your oil besides being submerged or the motor being mounted to low and entering the exhaust relief hole just below the cowling on the back of the motor are a leaking head gasket or exhaust cover gasket.
Or a crack in the cylinder head. This can be found with a cylinder leak down. Oil and water dont mix but can temporarily emulsify but later will separate into oil and water.
This could lead to corrosion in the cylinder rings etc. Could lead to engine seizure. So make haste oil is cheaper than an engine.
You should also fog the engine through the spark plug holes with SeaFoam Deep CreepTM it binds and attracts moisture. I have a 2003 Yamaha 4 stroke 115 hp that started having water in the oil after a full servicing. Only at higher rpms.
Below 3500 it will actually remove the water. This happened before and eventual. If the oil is coming out emulsified with water after a change Id say youve got a cylinder head problem.
I dropped a four stroke engine in the oggin the oil that was drained was emulsified but I flushed it through once and that was the end of the problem. Fuel in the oil is the enemy of four stroke outboards. Make sure and run them wide open often.
If you troll with a four stroke you need to change your oil more often not at 100 hours. Many people think that idling around is easy on a four stroke when it actually is the worst thing you can do to your motor. And ifwhen water is passing in the cylinder it will be a very clean looking spark plugnot rusty unless happening for a long timethe most common reason for water in the oil on a four stroke is stuck open therms.
I started that thread the other day. I bought a motor 40hp 4 stroke that was getting milky oil but couldnt pass it up for 300. Usually its a blown head gasket or a hole in water jacket on the powerhead.
I havent started tearing into mine yet but literally just drained the oil. Wasnt a pretty sight but I knew that going in. I saw a torn apart Honda 225-HP four-stroke outboard the other day and noticed two things about the oil reservoir.
How large it was and how low it was in the mid-section. Later I was talking to a mechanic friend who said theyve been having some problems with large four-stroke outboards traced to oil being cooled too much by being used at slow. The condensation will glides down passed the piston rings and into your oil with each stroke of the engine.
The end result is that you have milky oil due to water being mixed into it. Luckily thermostats are cheap and this should be an easy fix. Trolling in cold water might really be the toughest duty your outboard oil will ever see.
During extended trolling an outboard may not reach normal operating temperature and even with modern fuel injection and engine controls unburned fuel in the combustion chamber can condense and migrate past piston rings and contaminate engine oil a situation engineers call. How often to change oil in yamaha 4 stroke outboard manual Files for free and learn more about how often to change oil in yamaha 4 stroke outboard manualThese Files contain exercises and tutorials to improve your practical skills at all levels. Engine Oil Leak on a 4 stroke.
Ive got at 2000 F80TLRY and its leaking oil down the lower cowling. I dont see any in the bottom of the engine when I take off the upper cowling. Does this sound like the oil seal at bottom of the crankshaft.
If your engine has a fogging oil fitting you do not need to remove the air box cover. Four-stroke outboards have a plastic air intake that you spray the fogging oil into. Get the kind with a maintenance valve fitting if you have a Johnson or Evinrude outboard 1990 and newer with a maintenance valve.
Also Know will an outboard motor freeze. When my son did the winterizing of my boat he noted that the oil was chocolate a color. I know it is water getting in some where.
The boat was running good the last time I had it out on the water. Has anyone else had this problem. FC-W oil is mothers milk for four-stroke outboards but it is also recommended for use in four-stroke personal watercraft and gasoline inboards and sterndrives.
Of course because this is premium oil it has a premium price. A one-liter bottle of Mercury 10W-30 FC-W oil is 330 while a quart of Yamalube 4-M is 499 at my local dealer. Heres everything you need to know about how to winterize an outboard motor.
Change the Crankcase Oil. If you have a four-stroke engine its important to change the oil before you store your motor for the winter. The oil will be dirty and full of contaminants after summer use and over the course of the winter months these contaminants can corrode your engine.
Enshey 36HP Outboard Motor 4 Stroke Inflatable 55CC Fishing Boat Engine. Superior engine water cooling system for improved engine performance. Through the prop exhaust outlet for decreased noise and pollutants.
Standard CDI ignition system for easy starting and improved performance. Valvoline 4 Stroke Outboard 10W-40 Oil is a premium semi synthetic engine oil designed to meet the requirements of NMMA FC-W specification. Valvoline 4 Stroke Outboard 10W-40 Oil is formulated for both air and water-cooled 4 stroke outboard engines.
- Only use 4 stroke outboard motor oil 10W-30 or 5W-30. Do NOT put any gasoline or wrong type of oil into the sump. - Lubricate the rubber gasket on the new filter with a little fresh engine oil to assure a proper seal and then install by hand tightening the filter to specification 1520HP.