Yanmar 40 HP marire engine will not start or turn over. Batteries are charged. Thoughts?

Question

Yanmar 40 HP marire engine will not start or turn over. Batteries are charged. Thoughts?

Answer 1

loose electrical connection check all battery wiring.  starter.

Answer 2

Check all your electrical connections.  If there is voltage to the starter and it is not working pull your starter and go get it bench tested.  Try to roll the motor over by hand.  A couple rotations will do.  This will tell you if it is froze up. It should roll over with no binding. If there is binding you have bigger problems.    Good luck.

Answer 3

Wiring, switches, starter solenoid would be the areas I would check. Any fuses are worth a look as well.

Answer 4

I would check the starter solenoid first then the starter.

Answer 5

Maybe the starter is shot..or the internal guts of the motor are froze up...so if your starter not fire up...then maybe it shot..or it it does but nothing happens..then u got a problem inside of your engine

Answer 6

I would get a test light and a continuity tester, both are only like 5 bucks from an auto store. Check for continutuity between the + on the battery and the + on the solenoid/starter. Then check for - continuity.

Answer 7

Bad connection from the battery, try checking for breaks, or loose cables, or replace the cables.