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stanleym
01-12-2009, 10:00 AM
I have a 1984 force 85hp. It had been running great but wouldn't start back up after a day of fishing at the lake. Had to be towed. There is no spark on any of the cylinders. It's been sitting for a while so the battery is weak. Any ideas?

galamb
01-12-2009, 07:43 PM
"Stan, these don't need the battery for the ignition, so while that may be an issue for the starter, it won't affect the ignition itself.

This motor has a Prestolite ignition. 1 stator, 1 sensor/trigger, 2 CDI boxes and 3 coils.

It is unlikely that all 3 coils and both CDI boxes went "flooey" at the same time and ditto, all three feeds from the trigger.

So your troubleshooting should include testing the stator, plus the keyswitch or stop switch if equipped, plus all the wires to make sure nothing is broken, rotted, fallen off etc.

If you have the ability to do it yourself, you will need at least a workshop manual (Seloc's etc).

These ignitions can and do develop "phantom" problems which are sometimes very difficult to track down - which is probably why they are no longer used on outboards..."

daves69
01-13-2009, 09:05 PM
"Stan,
Both of my cd units died at the same time on my 84 Chrysler 90. TonyOB was a big help to me back then.
It takes some special test equipment to troubleshoot properly. Here is some info you probably won't see in Seloc or Haynes manuals.


http://www.maxrules.com/cdi/TroubleshootingGuide.pdf ("")"