Mercruiser 120 stalls shifting into gear until warm

seikeinlemming

Petty Officer 2nd Class" & 2020 Splash of the Year
Joined
May 23, 2011
Messages
140
Hello!

I have a mercruiser 120 with alpha 1 outdrive. When I start it cold, and shift into gear (both forward or reverse), sometimes the engine will shut off. I may be moving toward the dock and putting it in reverse to slow/stop and it will choke off (and then proceed to slide into the dock). This has always been at slow speeds maneuvering off the trailer over to the dock.

If I put the boat in neutral, and turn it back on, it always starts up immediately again without fail.

Once I run around the lake for a while and it has the chance to warm up, it seems that all is ok when approaching a dock. It works flawlessly as long as the engine is warm.

Any ideas what is causing this issue only when it is still warming up? I have come too close to sliding into other boats to let this go, and really would like to fix it because it is a real nuisance!
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Mercruiser 120 stalls shifting into gear until warm

It's a 4 cylinder engine with a carb, let it warm up. It's NOT EFI like your car.
 

BudL1te

Seaman
Joined
Jun 8, 2012
Messages
63
Re: Mercruiser 120 stalls shifting into gear until warm

Check the choke adjustment.
 
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