Tricky question on my 1980 ski-doo

[frabillfisher]

Well i got a 1980 ski-doo 500 everst electro that i got for free from a friend that hadant ran it in a few years and took the carb off and cleaned it...put some new gas in and it started rite up, problem was only the left cylinder was working...after checking the plug it was good so when it was running i helf the plug cap up and off the plug but still touching and the right cylinder would fire...put it all the way on and nothing...so i tested the coil and it was bad ordered a new one and put it on started up and ran for awhile then died and couldnt get it going again seems like its flooded and looks like nice spark on both plugs..it also back fired a few times when it did run this last time...so here i sit....? any ideas?? anyone?

[JEV]

I'm not to familiar with the early 80's skidoo's. To new for me. I've got a 72 skidoo and a 73 polaris in my garage now. Both are torn apart with similar problems. No spark. But, I'm not sure if your sled has a CDI ignition or a points ignition. The fact that your getting fuel and you've checked spark, whick you say is good, and you've mentioned it was backfiring makes me think it might be a timing issue. You might want to double check that....

JEV

[frabillfisher]

I cant seem to figure out if it has a cdi or points...they dont list a new cdi box for it so i would asume it has points...maybe thats wat i need is the new points and condenser anyone got and idea also if it says 79 on the snowmobile its really considered a 80 rite?

[Willy Walleye]

I would take compressed air and blow out both cylinders, I would turn the engine over as you are blowing in air, and put in new plugs and try that. Do you have good compression? These were pretty good sleds....If you want to sell it...I would be interested...

[frabillfisher]

Ya i've got good compression...i'll try your idea...sounds like you know a lot about fixing up old sleds?

[Willy Walleye]

Its a place to start....the carb might need more work also. If you can get the track off the ground so you can rev the engine up and get it warmed up some would help get the cobwebs out of the engine!!!