1991 90 hp force spark no spark. Help!

[hull1973]

I need some help with a boat I just bought. Every now and then I get spark and it will start but only run for a few seconds. Most of the time there is no spark at all. I took the flywheel off and two magnets and there were two loose magnets. I cleaned them up and epoxied them back in place on the flywheel. I thought this would have solved my problem but I soon found out it did not. I put it back together and it fired right up, ran for 10 seconds and shut off again. I got an occasional spark directly after that but silence ever since. Any Ideas will help greatly.

 

[olow]

Re: 1991 90 hp force spark no spark. Help!

could be intermitting coils which means the coils are firing at times and times there not

 

[Unforcefull Force]

Re: 1991 90 hp force spark no spark. Help!

It will not be the coils. Coils either work or they don't. Are you sure that the safety/emergency shut off switch up front by the ignition switch, has the clip all of the way on/making good contact? I have seen these work themselves halfway off and intermittently kill the motor. If that is not it, it is most likely a bad/corroded ground(s) OR the stator. Check/clean all ground wires in your electrical system first if the safety shut off is okay.

-Mark

 

[hull1973]

Re: 1991 90 hp force spark no spark. Help!

I disconected the kill switch and eliminated it from the system. I also disconected it from the ignition switch to make sure it wasn't grounding it's self out at the switch, still no spark

 

[Unforcefull Force]

Re: 1991 90 hp force spark no spark. Help!

Did you check the grounds for all of the electrical components?

Ohms test the trigger & stator if the grounds are okay.

-Mark