Coil not firing--suggestions?

[tsoileau]

I have a 1977 85hp johnson. I didn't think I had the power I used to have. Did tree mechanic spark test and no 1 not firing. Check compression==all around 145. Switched coils no 1 and no 3. Still no spark on no 1. No 3 fired both times. I am not sure what to check next. I tried to search but I guess I'm not asking the right thing. Suggestions for next step?

 

[ezeke]

Re: Coil not firing--suggestions?

If you checked all wiring to the power pack on both coils and switched them and the same cylinder did not work, you will probably need a new power pack. You still need to know what damaged the power pack. <br /><br />Download the Rapair troubleshooting quide. It is large, but thorough. It takes a few minutes to download but you can save it to your computer or print it. It is .pdf. Rapair Troubleshooting Guide

 

[OBJ]

Re: Coil not firing--suggestions?

Just swap power packs. If the no spark problem goes to the port side.....bad pack.

 

[tsoileau]

Re: Coil not firing--suggestions?

Only one power pack. Any simple checks for the power pack. I would hate spending the money for the power pack just to find that it's something else.

 

[tsoileau]

Re: Coil not firing--suggestions?

Bought a used power pack from a dealer and put on motor. Took the boat out today and it really ran crappy--not nearly as good as before. I touched cyl. 1 and 3 and the plugs and they were not even warm. Went and bought a spark tester and all cyl. have a blue spark that easily jumps 7/16. I will probably put the old power pack on and check the spark with the tester. After that???<br />Thanks for your help--frusted. Tried reading the manual but seems like I need another meter for some tests.