5.7 mercruiser hard start

Bayliner 2455

Recruit
Joined
Mar 16, 2019
Messages
2
Hi I have a mercuiser 5.7 thunderbold 2 barrel carb that has been fully reconditioned new plugs and coil. I’m having
starting issues when hot or cold. I crank three or more times
giving it three pumps before cranking. have tried everything
then go out runs awsome let it idle then switch off. If I start back up in 3mins it fires up straight away let it sit longer and
very difficult to start again
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,296
welcome aboard

what year, or better yet, what is your engine serial number

3 pumps is a lot - as in more than you would need.

could be improper choke setting
could be your flooding
 
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