Poor ideling Mercrusier 3.0 TKS

[Gschuitt]

I have a 2009 Tahoe with a Mercrusier 3.0TKS I/0. The motor runs great although it will not idle at low RPM. When I run up the motor studders and stalls at times, it stalls if I attempt to power up at minimum rpm. The motor stalled yesterday and took about 20 min of rest and turn over to get started. I am looking for trouble shooting points to start. Thank you Paul

 

[Rick Stephens]

Sounds like you're running rich when you have to sit for 20 minutes to get restarted.

I've never worked on a TKS, but the obvious issue your having would come from the enrichment solenoid on the carburetor. Mercruiser calls it the enrichment module 3310-866148. First thing is to try and clean it up. Kit the carb and then test the module according to the manual. My bet is you end up replacing it.