Spark one day...no spark the next day

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seeplaker

Cadet
Joined
Mar 12, 2008
Messages
11
Hi everyone. I'm having issues with my 1977 70hp Johnson. Started it up in the drive-way with muffs the other day. Started up nice, sounded nice. I thought to myself...cool! This motor has been the best motor I've ever had. So reliable and dependable. Took it to launch for the first cruise of the season. Went to start it and nothing, nothing and nothing. Would not start. Put it back on the trailer, went home. Put the muffs back on and still nothing. Checked a few things. Everything looked and checked out good. Finally checked for spark....no spark on any plugs. Is this common? Spark one day and then no spark the next. A friend of mine says it might be a bad power pack(?). Is there any way to test the power pack. Any help or ideas would be great and appreciated. Thanks.
 
ONERCBOATER

ONERCBOATER

Chief Petty Officer
Joined
Oct 11, 2010
Messages
536
Re: Spark one day...no spark the next day

just for kicks might want to disconnect the kill wire at the engine and see if you get spark back. I assume that model has at least 2 coils... strange to think they both could go out at once. so thinking kill wire, or switch box.

sean
 
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seeplaker

Cadet
Joined
Mar 12, 2008
Messages
11
Re: Spark one day...no spark the next day

Thanks for the suggestion Sean. Where is the kill wire on the engine? Color? Switch box, I assume you mean ignition switch(key)?
 
S

Sixmark

Master Chief Petty Officer
Joined
Jul 11, 2010
Messages
890
Re: Spark one day...no spark the next day

ONERCBOATER said:
just for kicks might want to disconnect the kill wire at the engine and see if you get spark back. I assume that model has at least 2 coils... strange to think they both could go out at once. so thinking kill wire, or switch box.

sean
Click to expand...

Never overlook strange things that could happen, you can find the procedures for testing power packs here on the forum by doing a search.
 
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