Hi all, I have a 1980 Moto Ski Super Sonic I picked up pretty cheap. I have a spark issue that was present when I got the sled. When I unplug the engine harness I have great spark on both cylinders. When I plug it back in I only have spark on PTO side. Any suggestions would be appreciated!
Mrcherrywood
MaxmachZ covered it, consider yourself lucky! Tether would be my first guess, maybe the cap is worn and not seating the switch properly?
Beautiful. Will you keep the Ski-Doo hood or look for a Moto-Ski hood? Also, nice Everest as well.
Im thinking for now keep the Blizzard hood and see if I come across one down the road. I have an Everest 500E, 1981. 1981 Everest L/C.
This is an interesting early electronic ignition system if this is the original system.
There are 2 electronic ignition modules, one for each side. The kill function that comes from the kill switch, tether switch, and ignition switch has 2 separate 'kill wires' that run from each of those switches to the engine harness connector and then to the 2 ignition modules. It sounds like one of those 2 wires is grounded somewhere on the chassis harness side of the engine connector, or is shorted to the ground return wire.
On the engine side, both of those kill wires to the ignition modules are black, and the ground return is brown. On the chassis side, one kill wire is violet, the other is violet/white, and the ground return is violet/brown. Trace out the violet and violet/white wires to see if one is grounded. If nothing is obvious, then disconnect each of those 3 kill switches and see if one of them has a permanent short from violet or violet/white to violet/brown.
Wiring diagram is here, on page 193 of this .pdf document. https://vintagesnow.com/Ski-Doo_files/1980_Shop_Manual.pdf
There are 2 electronic ignition modules, one for each side. The kill function that comes from the kill switch, tether switch, and ignition switch has 2 separate 'kill wires' that run from each of those switches to the engine harness connector and then to the 2 ignition modules. It sounds like one of those 2 wires is grounded somewhere on the chassis harness side of the engine connector, or is shorted to the ground return wire.
On the engine side, both of those kill wires to the ignition modules are black, and the ground return is brown. On the chassis side, one kill wire is violet, the other is violet/white, and the ground return is violet/brown. Trace out the violet and violet/white wires to see if one is grounded. If nothing is obvious, then disconnect each of those 3 kill switches and see if one of them has a permanent short from violet or violet/white to violet/brown.
Wiring diagram is here, on page 193 of this .pdf document. https://vintagesnow.com/Ski-Doo_files/1980_Shop_Manual.pdf
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