How to Check If Oil Injection System Is Working Or Not?
I have got a used boat with a 1995 Mercury 115HP 2-stroke motor on it.
The motor has an oil-injection-system. This means in theory I don't
need to mix oil with fuel. But when I examine the fuel in the boat, I
find that the ex-owner has already mixed oil into the fuel. I am
wondering if the oil-injection-system really works or not. I would
like to find a way to check if the oil-injection-system works or not.I supposed I can run the boat and keep an eye at the oil level in the
oil reservoir (knowing that the fuel already has oil and I don't need
to worry about running the motor without oil). If the oil level
gradually drop, this means the oil-injection-system seems to be
working, and I can feel free to add fuel without pre-mixing with oil.
If the oil level stands still, this means the oil-injection-system
fails, and I should pre-mix with oil and have the motor serviced. Does
this sound right? And yes I need to carry more spare spark plus because the motor will be
running very rich with oil. Thanks. Jay Chan |
jaykchan
Nov 15
2005
|
| Well said. And while you're at it, have them change the water pump
impeller. Unless you know for sure it is less than 3 years old, you should
change it to be certain it is fresh. This is a wear prone part and the
price of leaving it too long is engine overheating and possible meltdown.
|
Denis
Nov 16
|
| I am a bit confused with the suggestion. I guess the purpose of |
jaykchan
Nov 15
|
| Because I will bring the motor in for service/maintenance, I will ask
them to replace the water pump impeller. Thanks for the suggestion. Jay Chan |
jaykchan
Nov 15
|
| No. You are looking for the actual amount that the injectors would be |
Gene
Nov 16
|
| OK. Now I understand your suggestion. |
jaykchan
Nov 15
|
| Mix appropriate fuel/oil mix in a six gallon can. Pull the hoses off
of the oil injectors and run the engine off of the pre-mixed oil. The
maintenance manual should outline this procedure and give you a rough
volume per injector to expect. It may be that the oil injection system is deactivated, broken, or
that the previous owner hedged his bets by adding a little "extra" oil
in case of failure of the lube system. Small chance, too, that the
engine is newly rebuilt and needs this of "over lubrication" during
the break-in period. Since there is already oil in the tank..... it probably would be very
wise to figure out exactly *why*..... ignorance might turn out to be
really expensive....
|
Gene
Nov 15
|
| You're a new boater as I have seen you ask many questions in this forum lately. If I were you, I'd take the thing in to a Mercury mechanic and have them
check it out. Why run the risk of seizing the engine should the injection
system not be working? For the peace of mind of it all, why not just have someone who knows the
engine take a look at it? You've worked too hard to get to this point. barry |
Nov 15
|
