engine won't idle in gear

ChrisD2725

Cadet
Joined
Mar 19, 2014
Messages
24
I have a 90hp tower of power on my monark bass boat and it won't idle in gear or start without the high idle arm raised. If I idle in neutral it will idle all day but when I shift into forward or reverse the rpm will continuously drop until the engine quits, If I bump the throttle up for a few seconds and back off again I can keep it running but having to constantly blip the throttle is a problem when approaching the trailer!

Hole shot and wide open throttle operation are just fine. Compressions are fine, plugs are brand new surface gap plugs (previous owner had automotive style plugs in it). No gas is dripping from the carbs, bulb pumps up nicely. Idle rpm out of gear is around 650.

Your thoughts?

Chris
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,103
Re: engine won't idle in gear

Try turning up the idle a bit. She can idle at 900RPM in neutral.
 
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