Snowmobile Forum banner

1 - 2 of 2 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
What should the exhaust gas temperature should be with 420 main jets at idle - 3" from manifold, both outside cylinders are at 66 celcius - center cylinder exhaust is at 135 celcius....what could be the problem ????
 

·
Registered
Joined
·
25,385 Posts
There is an exact distance from the piston skirt.(3.937")100mm. Book says 635c is normal and preignition at 676c. Talk to Jaws and see what they recomend for jetting?
 
1 - 2 of 2 Posts
Top