Well, I just took my 2003 Polaris Predator 500 for a short spring time ride around the yard (after sitting for a few months).

It ran amazing, this thing is stupidly fast. After my return I desided to rev it hard in neutral (since I coulnt get the rev high in my small yard) just to burn off any carbon and clean out my carbs.

As I let off the rev's the thing backfired and I saw the fire come out the tail pipe. Is my jetting wrong? Or is this normal because I was doing this in neutral? Or is it because of my modifid exaust tip? Also I use 91 Octane level fuel.

Thanks in advace for all your help and input.

 

It backfires just like a 2 stroke snowmobile

 

It will always do that when you bounce off the rev limiter in nuetral!! I would not recommend doing that either!!

 

Yea stay out of that rev limiter........you will do some damage.

 

no i wasnt hitting the rev limiter, just reving it hard to burn the winter crap off

 

These things rev so quick....it is easy to hit the rev limiter.


I understand trying to get the burn the snow mold of the the spark plug, but just be careful.[img]i/expressions/face-icon-small-wink.gif[/img] Buddy of mine had to tear into the engine to clean the snow mold out of the combustion chamber....you talking about a messy job!

 

yeh i think i just killed my wolvey doing that

 

Well, pulled the plug and the good news its not full of metal, but its Black dry and full of carben i guess, it looked like the plug was in ashes, totally dry and black.

What does that mean??? <B>

</B>

 

gasoline only good for two months. maybe just drain the tank and put in new gas do to the gasoline went gummy. Or buy the stuff the refresh the gasoline.

 

Bad gas will cause a carbon fouled plug like THIS ????