3.0L 135HP MerCruiser A1 Vibrates Boat when Starting

arminius

Seaman Apprentice
Joined
Aug 30, 2016
Messages
45
Just bought a 2012 Bayliner 197 Deck Boat. When it first starts, the boat vibrates/shakes for about 5-10 seconds, then goes away. Is this an engine problem or boat problem?
 

Schmoe

Petty Officer 2nd Class
Joined
Feb 10, 2004
Messages
117
I don't think so, mine does that, especially after it's been sitting for a while. I think it's just burning off the gas from start up....you might need to adjust the choke settings....no hard to do.
 

fishrdan

Admiral
Joined
Jan 25, 2008
Messages
6,989
Mine does that if I bring it down to idle with the engine cold, bring it up to 1000rpm and let it warm up for a minute, and then it idles as smooth as,,, well smooth as a 3.0L engine can...
 

savetexomabeaches

Chief Petty Officer
Joined
Jul 4, 2013
Messages
420
After sitting for awhile, mine does it, like it almost wants to die on me, raise the rpms slightly until it smooths out, then drop er back down to idle -- should be fine.
 
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