1972 ski-doo weak spark - Snowmobile Forum: Your #1 Snowmobile Forum

Adam McIntosh · 10-24-2009, 04:38 AM

I have a 1972 ski-doo 399 Olympique. When you pull start it you wont get no spark coming through the plugs but if you take the plug out and hold the end of the boot with a screw driver in it it you will get spark but its very weak. It has brand new plugs in it so i know it isnt that im just wondering if it could be the coil packs are going bad? Both sides have weak spark. Im new to the snowmobile thing so any info on what it might be would be greatly appreciated.Thanks Adam

**smallengineguy** · 10-24-2009, 07:25 AM

CLean and file the points. Unplug the key/kill switches too.

Adam McIntosh · 10-24-2009, 01:32 PM

I looked for a kill switch but i cant find one anywhere on it. Where would it be located if there was one on it?

TwinsofMLB · 10-24-2009, 06:42 PM

Orange button on the handle bar.

**smallengineguy** · 10-24-2009, 06:46 PM

Back in those days it looked like a black doorbell in a chrome holder.

trashman36 · 10-31-2009, 08:00 PM

Check that the engine is grounded had a sled this summer doing the same thing. Ran a ground wire from the engine to the frame great spark now runs like a top.