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Mercury V200 1989

S

snoozer

New member
"hello,

i have the opportun

"hello,

i have the opportunity to buy a 2002 trophy with a mercury V-200 outboard engine. i know the engine had a major repair because of damage caused by a faulty oil injection. now the engine is working but with premix. no automatic oil injection. me personally i would say, great, one thing less which can be faulty or cause trouble. but the engine was obviously designed to mix oil in the engine. what is your opinion about this and is there a real technical reason why i should not go for that boat ? i don't mind the premix fuel at all.

your opinion is welcome.

Jan"
 
"Jan, if the motor was rebuilt

"Jan, if the motor was rebuilt/partially rebuilt then all should be fine.

I tend to agree with you. I don't entirely trust oil injection and it is expensive to fix if it goes wrong. Also, I don't see mixing my gas as this "major hassle" that they use a point to market the oil injection.

If it works properly it does have it's advantages. When you mix gas yourself you get 50:1. The oil injection varies the oil mix to meet the demands of the engine.

It may mix at 30:1 at idle and 80:1 at WOT which ultimately would burn less oil (hence less emissions) depending on how your run your set-up - but in the bigger picture, the amount between a mixed/pre-mixed set-up is probably not something you would notice yourself..."
 
"The major components of the o

"The major components of the oil injection system are
an oil tank, oil pump, and low oil warning system.
The oil tank is attached to the powerhead and holds
oil for delivery to the oil pump.
Oil is gravity fed to the oil pump via a hose.
The oil pump injects oil into the fuel at the fuel pump,
and is driven by the crankshaft.
A link rod is connected between the throttle linkage
and oil pump lever. When the throttle position is
changed, the link rod rotates the oil pump valve,
which changes the fuel/oil ratio from approximately
80:1 at idle speed, to 50:1 at wide-open-throttle."
 
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