93 ext Mt Cat Revisited.... - Snowmobile Forum: Your #1 Snowmobile Forum

Dennismc · 10-11-2007, 08:39 PM

ARGGGGG

Ok, when It was a little warmer out, (two days ago) I had the ext 580 runing like a kitten., started first pull, and idled no problem at around 1700 rpm..

Now that it is colder again 40-50's, she will not start, or I have to pull the daylights out of it to get it to fire up.

This is getting to be a mind numbing experiance for me.

I have cleaned the carbs, reset them to stock. Tried with and with out the harness connected, disconnect the mangicic carb switches.

ANY idea here what I could be missing? I thought the stator, but doesnt that fail when the sled is warm?

**RJ Gleason** · 10-12-2007, 12:28 PM

Condensation.

**smallengineguy** · 10-12-2007, 08:28 PM

Are your choke plungers functioning correctly?

Dennismc · 10-12-2007, 09:27 PM

That I have to say, I dont know. Where are they? And what are they?

**smallengineguy** · 10-12-2007, 09:33 PM

They are attached to the cables that screw into the top of the carb, kind of on one side, not the slides.

kccats · 10-13-2007, 08:41 AM

Is it outside overnight, how old is the gas? If the only thing that has changed is dropping 20-30 deg, what do the pugs look like? Are they dry and almost white? Or oily? Hows the compresion?