DSII coil resistance
- Thread starter JackFish
- Start date
ok, you have 2 sets of windings in the coil, primary and secondary. the secondary is where the coil wire plugs in, to go to the distributor, and the primary, which is run between the pos and neg terminals. you should be very close to OL measuing from the secondary winding to the primary winding. so 8 kilo OHM, is probably a shorted out coil.
Mercury Mike
Famous Member
JackFish, what were your symptoms that brought you to the conclusion that you may have a bad coil?
It's been really cold here, and I seem to have experienced a plethora of problems that cropped up at the same time.
First was the stalling every two blocks or on turns, stops and bumps.
So initially battery was suspect but that turned out OK because I have spares and a booster box.
I knew the carb has some stripped screws and so I swapped that out. There WAS a piece of small wire stuck in the inlet valve. And a small ding in the fuel filter so I think it may have been a little piece of mesh.
So it ran for a bit, really well at one point, but began to refuse to keep running and started stuttering. I suspected fuel pump, swapped that, no joy. Finally no spark today at the coil. I have swapped out the alternator also. (thanks Norm!
) It cranks over really well. I also have a spare regulator to test with as well.
I've been going over the wiring and swapped out a crappy battery lead.
The distributor is clean and dry.
I just got back from the parts store with the new coil and took a couple readings. I discovered there should be continuity between the + and - posts, right? I then checked the dirty old coil and there was intermittence. I will clean everything, and the harness, and if I'm lucky I'll get to return the coil. And Norm's alternator.
First was the stalling every two blocks or on turns, stops and bumps.
So initially battery was suspect but that turned out OK because I have spares and a booster box.
I knew the carb has some stripped screws and so I swapped that out. There WAS a piece of small wire stuck in the inlet valve. And a small ding in the fuel filter so I think it may have been a little piece of mesh.
So it ran for a bit, really well at one point, but began to refuse to keep running and started stuttering. I suspected fuel pump, swapped that, no joy. Finally no spark today at the coil. I have swapped out the alternator also. (thanks Norm!
) It cranks over really well. I also have a spare regulator to test with as well.I've been going over the wiring and swapped out a crappy battery lead.
The distributor is clean and dry.
I just got back from the parts store with the new coil and took a couple readings. I discovered there should be continuity between the + and - posts, right? I then checked the dirty old coil and there was intermittence. I will clean everything, and the harness, and if I'm lucky I'll get to return the coil. And Norm's alternator.
Mercury Mike
Famous Member
I'm having the EXACT same problems, and the funny part is, I went "Check the carb, fixed wirings to the coil, checked the battery, checked the distributor", but haven't checked the coil yet. I have another known good coil off of another engine that I pulled awhile ago. I HOPE that that's my problem. I can swap out the coil in about 30 seconds. I was having problems getting it to kick over, then it would stall. It would run badly, then run good, then run badly. It would stall when I stopped. I was getting bad spark. Sound like a coil issue?
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