what is the part number of your board?
Ok. Will let you know. Appreciate the offer.Hey Greg, just in case if you want to try it, maybe either me or Zephyr7(bill), could try fixing a couple spots in the board, I am not that experienced with the inner workings of electronics, but that looks simple enough for me to do, I do petty good soldering. You would have to find a couple replacement diodes and/or caps, and whatever else.
I save old TV's, computer power supplys, etc for free fast parts .... lot of good parts in them to swap over when I repair electronics....now I need to source the diodes for a spare back up! Thanks all.
With icepick light across low voltage coil terminals , light should pulse when crank engine....No power between positive and negative terminal....
Should have continuity between the 2 high voltage spark wire terminals on coil, but it will be a HIGH resistance SOMETHING like arround 3,000 to 10,000 ohms ...... I forget the actual number , but it will be high. It's not going to be 10 or 100 ohms. . Look in service manual it might list the ohms...... If I do not have any resistance between both female spark plug fittings on coil, does this mean I need to replace the coil? ....
Len, I tried the ingenious paper clip Test and no spark. Will try same with an alternate coil next.Should have continuity between the 2 high voltage spark wire terminals on coil, but it will be a HIGH resistance SOMETHING like arround 3,000 to 10,000 ohms ...... I forget the actual number , but it will be high. It's not going to be 10 or 100 ohms. . Look in service manual it might list the ohms.
But a practical test of coil is to bend up some paper clips and stick them down coil's spark terminals and set up a gap of something like ~ 3/4 inch and crank engine , spark should jump the gap. See how far spark will jump.
These coils are special , designed different than spark coil on an old car.
On these Onan coils each high voltage terminal goes to one end of the secondary winding.
On old cars one end of secondary went to ground,
SOME newer cars use same design as your gen uses.
But I'ld get a Onan compatible coil, since you won't have to experiment with the points capacitor value to get things working right.
Cap and coil make a LC circuit...... it resonates for ~ 5-8 cycles ........ I've seen this on a car tuneup oscillosocope ....coil's primary winding.