Johnson 1977 115 hp no spark 1 and 3 cylinder

[brickster]

No spark on 1 and 3, good spark on 2 and 4. Changed all plugs, changed 1 and 3 coils, changed power pack, changed timer base and sensors, did not change stator. Tried to start again with same results, no spark on 1 and 3. Does anybody have any ideas on what my problem may be? Thank you.

 

[boobie]

Try the stator.

 

[brickster]

Would have replaced the stator but ran out of energy. Seems like a bad stator would give you no spark in any cylinder and it appeared to be in good condition, no cracks.

 

[boobie]

If I remember right, that stator has two different circuits in it and one could be bad. May be wrong.

 

[brickster]

It's worth trying a different stator and if it doesn't work I'll concentrate on the sensor coils once again

 

[boobie]

Let us know what happens.

 

[brickster]

Changed the stator today and still no spark on 1 and 3. Swtched sensor leads in the power pack, now have spark on 1 and 3 and nothing on 2 and 4. I guess the second timer base I put in was also bad, it was not new. Still have 2 more timer bases with sensors, guess i'll try them tomorrow, or if you have any other suggestions, is it possible the terminal block may be bad?

 

[interalian]

Could be cracked wiring on the timer base. Make sure you torque the flywheel nut properly before running it.