Spark problem

[Campnc]

I have a 87 Bayliner with an 3.0 OMC I/O. I have changed the coil 3 times and still it keeps on burning out the coil. I have gone as far as to disconect the whole harness and run battery power thru a resistor to the coil then fron the coil thru a resistor to the distribitor. Runs great for about 20 minutes then I try to idle it up a little, maybe about 1500 rpm and within a few minutes the coil go out again. Do any of you out therehave a clue on what is wrong?
Is there a electric ignition I can change over to?
I really need some help here................

 

[thumpar]

Re: Spark problem

Have you tried letting it sit after it dies to see if the problem may be heat?

Yes they do make a conversion. I just ordered the pertronix ignitor II electronic conversion and flamethrower coil for my 2.5l. I would not get the ignitor original because if you leave the key on it will kill the unit.

 

[Campnc]

Re: Spark problem

I have waited for it to cool down but still no spark. Go to the parts store and buy another coil and same thing happens. Coolant is running at 180 deg.

 

[Reel Poor]

Re: Spark problem

It may be a tach problem. Disconnect the grey wire from the negative side of the coil and see if that helps.

One other thing. Automotive coils are not for marine use.

 

[Dakota47]

Re: Spark problem

Sounds like a bad Voltage regulator..