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Yamaha 25MSHC 25hp ( Need Help )

TGBTG7701

Member
I have not worked on a Yamaha outboard before, hope someone could give me some advise. The outboard is a 25hp 2 cylinder 2 stroke, pull start outboard, ran perfect one day and nothing the next. It appears to not be firing, but we are getting gas to the combustion chamber. I have looked over the safety (kill switch) circuit, but do not see anything that I notice to be tripped. What is so very strange, it ran perfect, one day, and nothing the next, the easiest outboard I have ever seen to crank. I can't help but feel something in the safety circuit is keeping it from running. What do you think? I appreciate any advice I can get, Thank You.

Keith
 
The statement ---" it appears to not be firing " ---means very little.----So is there spark on both leads that will jump a gap of 3/8" ( 1 cm ) on both leads, yes or no ?
 
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