Marine: Boating, Sailing, PWC, GPS and Navigation - Starting and Engine
Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.View Full Version : Starting and Engine
JohnC62
01-24-03, 02:22 PM
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.
Thanks,
John
Thanks,
John
BoatCop
01-26-03, 09:39 AM
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)
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)
BoatMech
01-27-03, 12:23 AM
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.
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.