Starting and Engine


Old 01-24-03, 01:22 PM
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Starting and Engine

I have a 1995 Johnson 112 SPL. Why do I have to give my boat some throttle to start it up?. I just recently had my carbs rebuilt and new fuel pump installed.


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Old 01-26-03, 08:39 AM
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Did you check the "choke" circuit? Not a choke per-se, but a solendiod operated plunger that injects extra fuel into the carbs to assist in cold starts.

Have someone push the choke button or key while you listen at the engine. You should hear a distinct "click". The key has to be "ON".

It's not uncommon to have to pump the throttle a few times to get an outboard started. Especially an older one. After a while, the piston rings and/or cylinder walls wear, thereby not creating sufficient vaccuum to draw fuel into the cylinders by themselves. Also, weak intake reeds may cause this. This doesn't affect the running engine to a great extent, but is a mild nuisance when starting.

The only OB engine's I've seen that are truly a turn-key start are the fuel injected, computerized ignition engines. (ie-Mercury Optimax)
Old 01-26-03, 11:23 PM
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It may be that the mechanic did not properly synch the link.

The carb cam is indexed for the proper opening of the butterfly.
It may be that they messed with the timing. That could
be hazardous to your engines life if they screwed with the
mag stop on the high end too.

Two things, check the synch, put a timing light on it.
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