Johnson 150 Ocean Runner leaving oil sheen

[TexasX]

I just noticed this past weekend when warming up my motor before heading out in the bay, that a oil sheen was very visible. How should I go about trouble shooting this problem, as I am a newbie to outboard motors.

Thanks!

 

[Chris1956]

Re: Johnson 150 Ocean Runner leaving oil sheen

Remove the motor cover and the airbox. Now look for leaks from the carbs, fuel and oil lines and fuel pump and VRO pump.

 

[F_R]

Re: Johnson 150 Ocean Runner leaving oil sheen

You have to realize that a certain amount of oil sheen is normal in a two-stroke engine. The oil that is mixed with the gas in the fuel tank or by the VRO goes through the combustion chambers after doing it's job of lubricating the powerhead. In the combustion chambers, some of that oil is burned (smoke) and the rest goes out the exhaust (sheen). More sheen on a not-warmed-up motor is also normal because it wasn't burned in the cool combustion chambers.

If the motor is running properly and nothing is leaking, and you are not consuming unusual amounts of oil, it is best to not worry about it.

 

[TexasX]

Re: Johnson 150 Ocean Runner leaving oil sheen

Thanks for the replies! What is the typical consumption of oil, and how often is the typical adding oil needed?

 

[Cricket Too]

Re: Johnson 150 Ocean Runner leaving oil sheen

Carburated 2 strokes waste some raw fuel/oil mixture directly out of the exhaust, due to scavenging, on top of the oily dirty exhaust from burning. They never have and never will run clean, that's why they are becoming extinct.

If you are running with your VRO (OMS) then your at 50:1, 50 parts of fuel to 1 part of oil, every 12 gallons of fuel is 1 quart of oil (really 48:1), so depending on the size of your gas tank, you can go by 12 gallons = 1quart oil, 24 gallons = 2 quarts oil or 50 gallons=1 gallon of oil (roughly).

So every 50 gallons you burn you will fill up a gallon of oil. But it's best to just keep your eye on the oil tank, I usually add when it gets about half empty, just top it off.