40 HP Mercury 2 Stroke Oil Injected - What should I know about winterizing?

[kellmike626]

Just recently bought a pontoon boat that came with a 40 HP Oil Injected Mercury Outboard motor (4-cylinder). Runs great, starts up on first try. The Boat itself is a 1993, so I'm not sure if the motor is the same year.

I've had experience with one outboard motor before, which was a regular 2 stroke 40 hp Merc (premix). But I'm completely new with oil injected motors.

I know the instructions to follow for winterizing (change out gear lube, fogging cylinders, and everything else) but what I'm wondering is if there's anything different needed to be done for oil injected outboards...would I have to change out the oil in the reservoir? (probably a stupid question...) Or anything else different?

I know in the spring time, I heard that it's best to run a 50:1 mix in the tank just to make sure the oil injection system is working. Can somebody confirm this as well?

I will try to find out the year of the motor so hopefully I can get more information on it. I haven't got a manual so I'd better order one too.

Thanks for any help.

 

[Texasmark]

Re: 40 HP Mercury 2 Stroke Oil Injected - What should I know about winterizing?

Don't think so. Oil, by it's very nature is stable over time. Never had oil of any type go bad sitting on the shelf and some I have had for 10 years or so. On fogging, I'd spray Sea Foam into the carbs until it dies. Sea Foam contains oil so you get lube in all the little corners. On spring run-up, I'd only run a gallon or so of pre-mix, just enough to get your results.

Mark

 

[Silvertip]

Re: 40 HP Mercury 2 Stroke Oil Injected - What should I know about winterizing?

Whatever you did for you NON-oil injected engine works for oil-injected engines. There is nothing extra required for the oil injection system. However -- add fuel system stabilizer and run the engine long enough to get the treated fuel into the carbs where it is actually needed.