85ish excel 3 fouling plugs - Page 2 - Snowmobile World : Your #1 Snowmobile Forum

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post #11 of 13 (permalink) Old 10-19-2015, 02:09 PM Thread Starter
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I put in new plugs today. I was able to run it up and down the yard (20' back and forth on grass) and it would still idle after each pass. Still a lot of smoke, but the mixed gas in the tank is almost 50:1 which might be too much.

Here is what the new plug looked like after 5-6 minutes of running plus moving it 4-5 times.

The clutch sorta seemed like it engaged rather high...around 4K.
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post #12 of 13 (permalink) Old 10-19-2015, 05:51 PM
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That's pretty normal for engagement, especially with a small engine. 2-stroke engines don't produce much torque, so you really have to spin 'em to get any work out of them!

The plug looks pretty good to me. I think as long as the sled runs and idles when you stop, a lot of the smoke issue will go away once you can get it out on the snow and work it. It's really hard to judge anything by the plug in the temperatures you are running, the sled will run rich now, and that always makes the plug black. I don't see a ton of oil, which tells me you are making progress

2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah
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post #13 of 13 (permalink) Old 10-21-2015, 07:28 PM Thread Starter
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I took off the carb
was surprised to find the inside of the bowl covered in rust.
cleaned up the carb, adjusted the float (seemed like it had to go up too high to close the needle) but none of that changed how the sled ran
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