Inconsistent idle

captchuck

Lieutenant Commander
Joined
Dec 4, 2011
Posts
186
Likes
12
Location
Long Island
Boat Make
26' Seaway
I know it's not a diesel question but here goes. I have a Volvo 5.7 carbureted straight inboard in my 26 seaway. Electronic distributor and a Rochester carb. Only issue I have is that the idle is rarely the same for example after I ran for around 45 min yesterday and when i came into the creek and up to the dock the idle was so low she wanted to stall and at times she will idle too high say around a 1000 and therefore she knocks in and out of gear a little.
Any thoughts? Thanks guys
 
Last edited:

jerseysportfisher

Rear Admiral
Joined
Feb 13, 2012
Posts
1,181
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149
Location
Communist part of NJ
Boat Make
Bertram 33SF
first check the easy things, is your throttle linkage binding ? when you move the throttle up and back does it always return to the same spot on the carb every time ?
 

Pedlyr

Captain
Joined
Aug 31, 2011
Posts
535
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179
Location
Southern RI
Could be a vacum leak. Either base of carb or intake manifold.

Check the little filter at the carb on the supply line and make sure it's clean.
 
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