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 Need guidance on idle. 
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MMT Pro Member

Joined: Wed Jun 17, 2009 4:56 pm
Posts: 83
Post Need guidance on idle.
Motor is a 2011 35hp gdsd. I have had my valve lash checked/adjusted and carb cleaned adjusted. Had trouble with idling before having work done. Had it “fixed” and after 1 trip it’s back to not idling. Give it a little gas and it’s fine but let off the throttle
And it jumps down to 6-700 rpm and slowly falls till dying. Should I just adjust the idle screw or mess with the governed idle spring .


Sun Jun 17, 2018 7:41 pm
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Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
Post Re: Need guidance on idle.
Stock carb ???

If yes - do you still have an idle spring - or has it been lost ???

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Sun Jun 17, 2018 8:15 pm
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Joined: Fri Feb 06, 2009 8:36 am
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Location: Nac-o-no where, tx
Post Re: Need guidance on idle.
Every stock 35 I had did that


Sun Jun 17, 2018 9:06 pm
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Joined: Mon Dec 31, 2012 11:07 pm
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Location: West Monroe, LA
Post Re: Need guidance on idle.
Adjust the idle to be at 1250 out of water, then adjust the air fuel mixture. Readjust the idle if necessary to 1250. Report back.

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Sun Jun 17, 2018 9:43 pm
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Post Re: Need guidance on idle.


Mon Jun 18, 2018 2:45 pm
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Post Re: Need guidance on idle.


Mon Jun 18, 2018 2:52 pm
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Posts: 870
Location: SW LA
Post Re: Need guidance on idle.
I’ve done 2 things to fix idle.

1. Pull the slack out of the throttle cable (1/4”-1/2”)
2. Turn idle screw. In my case no more than 1/4 turn. If you turn too much you’ll know it when you crank it up.


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Mon Jun 18, 2018 8:14 pm
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Location: West Monroe, LA
Post Re: Need guidance on idle.
Adjust that screw while it's running after it's warmed some. Can't set to a specific rpm if you adjust it while it's off. Air mixture screws too. Can't see if they're correct without it running.

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Mon Jun 18, 2018 8:24 pm
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Joined: Mon Feb 06, 2012 6:13 pm
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Location: D'town, LA
Post Re: Need guidance on idle.
Adjust after it has warmed up, too.


Tue Jun 19, 2018 2:32 pm
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