"HK" wrote in message
m...
SteveB wrote:
Is if possible for oil, like gas to go bad if it sits in a boat too long?

I'm getting that '89 Merc 40hp four banger Tuesday. I remembered when I
was talking to the guy that he said it has problems running at top speed.
I asked if he ever ran it without oil in the gas, and he said he always
ran a 50:1 mix, IIRC. Well, that boat has an oil injector. Maybe he ran
too much oil. Is it possible to disable the oil pump and run just mixed
gas? It looks like I will have to take some time and a manual on this
one to figure out what's up with the engine, and the tilt. I did pick up
fresh plugs for it.

Should I drain the old oil, as well as the old gas?

Steve

What's it got, a small oil tank under the hood, or an external one? No
harm in draining and properly disposing of the old oil. Are you saying the
previous owner mixed oil directly into the gas and also put oil in the
small tanks?

If the oil tank injector system is working, why would you want to disable
it?

Won't know exactly if the pump is working until I did get it. When he told
me it was having problems on high end, I asked if he was sure he never ran
straight gas. He said he always ran mixed, inferring he mixed the gas. I
did not know it was Oil Injected until I saw it. Now, I think he may have
overoiled it and fouled it out. He said the plugs looked oily.

There is an opaque tank under the cowling on this model that fills through a
cap going to the exterior. I am going to make sure the injector is working
properly, as that is a lot easier than mixing gas.

I'll probably dump it, but in my shed, I have cans of two stroke oil that
are years old. Just curious if any of that went bad, and should I use it or
chuck it and get fresh.

Steve