Re: Hard Starting

Posted by Steve203 On 2014/9/23 20:35:26

Most likely the fuel is evaporating from the carb or boiling over and flooding. This due to the modern fuel.

That was my first thought as I had a Merc that did that constantly. Part of the problem with the Merc's carb was the needle didn't seat properly, so gas would drool into the float bowl, then overflow into the manifold. I've seen an engine so flooded that it backfired through the carb 3 or 4 times before the excess gas was blown out so that it could run.

From the pix I see on line, it looks like a 40 has a downdraft carb, so overflow would drool into the manifold, vs an updraft carb where overflow would drool onto the garage floor.