Mercruiser 3.0L won't idle when hot

gleavens

Seaman
Joined
Sep 17, 2008
Messages
63
Engine runs great cold, I can run it wide open, or troll around for about half an hour. After about that much time if I try to bring it down it stalls, it'll restart if i hold the throttle 3/4 full, I can rev it up,but as soon as i bring the throttle back to put it in gear, it stumbles and stalls. Carb has been recently rebuilt, choke is set, fuel - water seperator installed, electronic ignition installed, new plugs ( 3 times). Eventually it will restart and I can get to shore, any thoughts?
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,103
Re: Mercruiser 3.0L won't idle when hot

Carb has been recently rebuilt,

Ayuh,... The idle circuit is still pooched...
 

gleavens

Seaman
Joined
Sep 17, 2008
Messages
63
Re: Mercruiser 3.0L won't idle when hot

After more experimentation, it appears to me that if I baby the thing I can run more than an hour just cruising around leisurely, and slow to a troll, bring it in to nuetral all without a stall. However one WOT run across the lake (1.5 miles or so ) and thats it .... stumble, stall...........wait about a half hour before it will start again, crank it up to full throttle to get back to the ramp and as soon as I throttle down.....stall. Any thoughts?
 
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