No spark on no. 2

[rebco]

Rebco
I have a 70 hp johnson. It runs great for 10-15 mins. Then there is no spark on no. 2 cyl. Switched plugs, wires, & coil. Still no fire on no. 2 cyl. any info. !!!!
Model no. J70plssd , 2000 yr. model.

P.S. Is there a shut down mode on this engine, like hot or low oil, etc.
thanks

 

[boobie]

Re: No spark on no. 2

Model # ??

 

[rebco]

Re: No spark on no. 2

Model # ??

Model no. J70PLSSD, 2000 yr. model

 

[rebco]

Re: No spark on no. 2

2000 yr. model, model # J70PLSSD.

 

[boobie]

Re: No spark on no. 2

If you switched coils I'd say you have pack or timer base probs. Best way to check out is with DVA and OEM service manual. Even a cave man could do it. LOL.

 

[rebco]

Re: No spark on no. 2

installed new pack. still shuts down on no. 2 cyl. and now misses above 3600 rpms. stumped, Rebco

 

[boobie]

Re: No spark on no. 2

As long as your guessing at this, try a new timer base. Have you got spark on all three cyls when cranking, meaning jumping a 7/6" open air gap?? Did you ever get a OEM service manual or any test equipment??

 

[rebco]

Re: No spark on no. 2

Took boat to johnson mech. Checked timer base, chased down to a bad diode? Hope he is right!!!! Thanks for your time and info. Rebco