Cold Weather Cold Start Mercruiser 5.0 MPI

[ATLTiger97]

I noticed when the temp dropped I get some smoke (white I think) and a rich fuel smell when I start the engine in cold weather. Goes away in a few minutes after the engine warms up.

The mechanic said this is normal with more fuel being added during low temp. Everyone agree with this?

The boat has only been mine for about 8 months, she has 650 hours. I need to check the flame arrestor and have yet to pull any plugs.

Thanks for any thoughts!

 

[scoflaw]

Not normal. How cold could it possibly be in Georgia?

 

[ATLTiger97]

Not normal. How cold could it possibly be in Georgia?

Mid 30s at night sometimes not too bad.

 

[Jeff Delbuono]

I agree, i have twin 5.0 efi. At the thermostat housing are 2 sensors. 1 is for the guage and 1 is for the ecm. That 1 When cold tells the motor to run rich then lean out when warmer. My 2 cents