72 Merc 650 won't idle

morge

Cadet
Joined
Jun 12, 2005
Messages
13
Gents, I have searched the forum and cannot find the suggested procedure for setting the idle mixture. I would really like to try this and whatever else you suggest while I am waiting for my shop manual to arrive (will still me a couple weeks - trans border mail to Canada)<br /><br />1 1/2 turns out? <br /><br />PS: The problem is it starts fine, runs fine, but only idles for about 15 - 45 seconds before idle drops, it starts running rough, and eventually dies in another 30 - 45 seconds. It makes me look even more like a rookie trying to dock the thing, have to keep starting at high idle and hammer it into gear for a moment... When it is a busy gas dock I have to use the electric trolling motor...
 

timmathis

Lieutenant
Joined
Apr 24, 2005
Messages
1,295
Re: 72 Merc 650 won't idle

1 1/2 out from seat.Then 1/4 turn out at a time till it smoth. Then 1/8-1/4 more. If that don't fix it. You will need to do a carb cleaning and a linc & sync. If you keep hammering it in gear you will be in trouble!!! Tim
 
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