Mercruiser 4.3l runs rough after turned off

[Tie47]

Engine: 2006 mercruiser 4.3l carbed

PLEASE HELP, engine starts and idls perfectly. Once warm will throttle up and down great as well. HOWEVER, once the engine is turned off after being warmed up and turned back on it runs horribly.

So far done
cap rotor
wires
spark plugs
Cleaned/rebuilt carb
compression check (one bank more consistent than other but still within tolerance)

Any help would greatly be appreciated

 

[Chris1956]

You should repost this in MerCruiser forum.

Is it overheating? Check the thermostat, as that is a normal maintenance item.

Are the manifolds or risers clogged? That can cause overheat as well.