yamaha 150 2 stroke no spark on 2-5 cylinders

[toadsmoto]

hi i have a weird problem with this motor it will not fire on cylinders 2 and 5 we have replaced all the electrical part stator,crank position sensor,cdi pack, and those two coils. do you know what could be the problem ever seen this happen

 

[99yam40]

Re: yamaha 150 2 stroke no spark on 2-5 cylinders

Some motors do not fire all cylinders at idle in neutral

 

[spotter22]

Re: yamaha 150 2 stroke no spark on 2-5 cylinders

hi i have a weird problem with this motor it will not fire on cylinders 2 and 5 we have replaced all the electrical part stator,crank position sensor,cdi pack, and those two coils. do you know what could be the problem ever seen this happen

I had a similar problem, you need to check the yellow wire on the ignition key it needs to have power when you open the key. If it does not have power cyl 2,5 won,t fire. If it is not getting power check all your pin connectors before buying a ignition switch.

 

[Capt Ken]

Re: yamaha 150 2 stroke no spark on 2-5 cylinders

How about a model number so we actually know what you are working on?

 

[RogersJetboat454]

Re: yamaha 150 2 stroke no spark on 2-5 cylinders

Thread will be a year old in June...
Think the OP has moved on...

 

[Capt Ken]

Re: yamaha 150 2 stroke no spark on 2-5 cylinders

Frap! I never catch those.