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Dadozer 02-13-2010 08:15 PM

2007 arctic cat m8
Im in Bear Lake, UT on a snowmobile trip and all of the sudden my sled started sputtering on the top end only reving out to about 7400 rpm, the snow here is epic right now over the hood powder! but my sled runs like poo, any suggestions?

Powersledder 02-13-2010 08:19 PM

Is you exhaust getting plugged up? Running in deep snoe like that can plug the exhaust, when the exhaust gases have nowhere to go it makes the engine struggle.

Have you tried getting the engine to reach revs on packed snow?

Ibreakstuff 02-13-2010 09:35 PM

Exhaust valves dirty?

Dadozer 02-13-2010 11:08 PM

i have tgried running it full throttle on the hard packed to clear it out and it still sputtered, i have not cleaned my exhaust valves yet though and its got 1400 miles on it im going to try that out tomorrow morning before i go though and suggestions?

Ibreakstuff 02-14-2010 11:55 AM

It shouldn't sputter if the exhaust valves are dirty, it should just be weak at high RPM and not attain max RPM. Change your 4 plugs, easiest thing to do. Make sure your fuel filter is clean. Any codes or anything on the dash?

Rubi 02-14-2010 12:17 PM

Snow ingestion into the air intake, or maybe water in the gas could possibly cause this too.

It must be painful for a Cat rider to have his sled "run like [a] Poo."

Dadozer 02-14-2010 09:08 PM

well i tore my beautiful sled apart and found some gummed up exhaust valves and the right bank exhaust valve cable snapped! so there was my problem a broken cable! unfortunately i had to ride a polaris cause there was now way for me to get the parts.

Ibreakstuff 02-14-2010 09:11 PM

First idea I had was right. Keep on goin bud, exhaust valves are easy to clean. Couldn't tell you how hard it is to change the cable out.

Powersledder 02-14-2010 10:57 PM

A friend of mine with an '03 F5 had the same problem, snapped EV cable

flatlander_summit 02-15-2010 01:34 PM

I thought these sleds were trouble free?

Ratstang 02-15-2010 04:25 PM

I would put something under valve, or around broken cable to hold valve open. That way you can ride it. You most likly won't even notice the valve not working if you have it stuck open.

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