No spark!!

[dykstra]

1997 Fountain 525SC. The boat was running fine all day until the afternoon. Then all of a sudden the motor just quit! I have no spark, and when I try to turn the engine over, the circuit trips above the key. I have already replaced the ignition module and no luck. Any help is appreciated.

[MOBILEMERCMAN]

If it is blowing the breaker I would be checking for a shorted purple wire.. Check behind the key switch , the alternator and where ever else you can see a purple wire on the engine.

Un plug the main ten pin and see if it will run with jumper leads at the engine.

[dykstra]

If it is blowing the breaker I would be checking for a shorted purple wire.. Check behind the key switch , the alternator and where ever else you can see a purple wire on the engine.

Un plug the main ten pin and see if it will run with jumper leads at the engine.

You know its wierd, while the engine was running, I noticed my volt gauge was 14.5. I thought that was unusually high. I don't know if this has any correlation to the purple wire also?

[MOBILEMERCMAN]

Purple is the keyed hot wire. It has power when key is on.. I have the 525 SC ignition on my engines.. It has the big finned ignition box like a MSD.. I find they are NLA.. I will look to see if I can find a basic troubleshooting guide like the thunderbolt HEI has.

I don't think the 14.6 has anything to do with your problem. Something is drawing on the purple wire to blow the breaker. Maybe a bad wire. Maybe the ignition box.. Just need to systematically go through it.

[dykstra]

Thanks for the help. It is a stock mercathode ignition.

[stevesxm]

Thanks for the help. It is a stock mercathode ignition.

the mercathode thing is the anti corrosion deal and not your ignition box if thats what you are thinking or maybe you just mis typed...

[MacGyver]

Does the breaker trip when you simply turn the key to the run position, or does it trip when you move the key to the start position?

[dykstra]

the mercathode thing is the anti corrosion deal and not your ignition box if thats what you are thinking or maybe you just mis typed...

You are right. Stock Thunderbolt IV ignition.

[dykstra]

Problem solved. The hour meter wires were rubbing together!!!!!!!!!!! Bring on Memorial Day!!!! Thanks for all the replies. Dave

[DAREDEVIL]

Problem solved. The hour meter wires were rubbing together!!!!!!!!!!! Bring on Memorial Day!!!! Thanks for all the replies. Dave

At least it was something kind of simple !!!!!!!

[dykstra]

At least it was something kind of simple !!!!!!!

I get lucky every now and then!!!!!!!!