I have been trying to diagnose a stall problem for a while, and noticed today on the Great White, that as soon as the electric cooling fan comes on, the engine shuts down. Is this something that anyone has encountered in the past or was this some sort of coincidence? I have checked fuel relay and pump, and nothing seems to be an issue there.

 

Sounds like the extra current taken by the fans is dropping the voltage at other critical points.

Could well be a ground connection problem, do a search on "Wally's annual check"...

 

Thank you John, I was quietly thinking that was a possibility, but did not know if it was a reasonable assumption.