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Itbsback No fire on #5 1997 200 Ocean Pro

D

dingbat

Member
"2 years ago I couldn’t get th

"2 years ago I couldn’t get the motor to run over 5k RPM. Upon investigation it was found that #5 cylinder was dropping out above 5K rpm. The stator, timing base, coils, and PP checked out and the issue was finally resolved by replacing the flywheel. The exact cause of the problem was never identified.

Fast forward to yesterday. I took the boat out for a run. It idled poorly passing though the no wake zone and I couldn’t get above 4.5K rpm out on open water. A couple of times it kicked in and I could run WOT but drop back down to idle and try it again, nothing.

Here is another symptom. We trolled most of the day between 1000 – 1200 rpm and found that the motor would act up (buck, thump) when varying the rpm but would settle down to a “rhythmic” idle in short order.

Started trouble shooting this afternoon and found #5 cylinder not firing at idle. I’ll run through the whole test procedure in the morning but it just seems too much of a coincidence that it’s the #5 acting up again.

Hard to believe that it’s the flywheel again but the symptoms are too similar to dismiss. Any other ideas?"
 
"repl the COIL on that cyl or

"repl the COIL on that cyl or coil assm.even if u repl another component,repl the coil ."
 
Ran continutiy test on the sen

Ran continutiy test on the sense coil and found Pin C on starboard bank at half the resistance (490 ohms vs 880 ohms)of the others. Does this corralate with the problem on #5?
 
I learned the hard way to try

I learned the hard way to try the easy stuff first.

I started at the flywheel and worked backwards where as I should have started at the coil and worked forward.

It turned out to be a bad coil. That particular coil was replaced 2 years ago but before the problems of two years ago.

By your remarks I can only assume that problems upstream eat coils.
 
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