qtband
L1 Scorpion - The Great Snowmobile
Posts: 9 
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Post by qtband on Feb 16, 2018 13:35:08 GMT -5
I have a 1978 Whip and I'm only getting spark from 1 cylinder. The sled has sat for awhile so I cleaned the carb (Walbro) and fuel pump. When I checked for spark, I'm not getting anything on the PTO side. Where do I start my diagnosis? Attachments:
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Post by shreddagnar on Feb 16, 2018 17:59:36 GMT -5
I would switch things from one side to the other until you get spark or the spark changes sides. So swap plugs, check. Swap plug wires, check. Swap coils, check. If after that the spark doesn't change sides the problem would be in the stator.
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Post by oldscorpman on Feb 16, 2018 18:04:59 GMT -5
sand your points with 400 grit paper and the clean the points with brake clean. this is a very common problem
with a sled that has not been run in a while.i do this every fall to all my scorpions.
rick
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qtband
L1 Scorpion - The Great Snowmobile
Posts: 9
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Post by qtband on Feb 16, 2018 18:59:01 GMT -5
Can I get to the points thru the inspection hole?
Are the coils interchangeable, Left & Right?
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Post by shreddagnar on Feb 16, 2018 21:47:21 GMT -5
You can see the points through small hole in flywheel. The external coils are interchangeable.
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qtband
L1 Scorpion - The Great Snowmobile
Posts: 9
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Post by qtband on Feb 17, 2018 14:06:50 GMT -5
OK. I used a point file to clean the points and I got sprk on both cylinders. I put it all back and I have nothing. This time, I believe it'e the ignition. When I got the sled, it had a screwdriver for a key. After I put it together, I noticed the screwdriver was gone so I just used another one. Turning the key, it feels :goofy". I removed the switch and cleaned it. Checked it with a continuity tester and I get no continuity between any terminals when the "key" is on. Can I just bypass the switch for now? I guess I'm asking how to "hotwire" it. Here are the wires going to the switch and the back of the ignition switch. Help please! Attachments:
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vtscorp
L2 Scorpion - Above All
Posts: 38
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Post by vtscorp on Feb 17, 2018 19:04:55 GMT -5
I think the ignition contacts close when off to short out the coils. There should only be continuity on the lighting wires. It should start with the connector off but no lights.
Clean the contacts then when you think they're good, clean them more, and again. Contact cleaner and white business card for the final polish.
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Post by oldscorpman on Feb 18, 2018 13:33:17 GMT -5
remove the plug off the switch and see if you now have spark. your sled will run without the connector on the switch but you will not have lights. if you have spark then its the switch, if not you have a wire issue.
rick
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