|
|
Post by hoove on Aug 2, 2008 16:10:06 GMT -5
We all know how important the air fuel mixture is. Too rich and the engine bogs down, too lean and it burns up (overheats, seizes). I've heard two schools of thought on reading plugs, one is to pull the plug cold and look for that nice brownish tan color on the insulator. The other involves the plug chop. Get the engine warmed up, revved up under load, kill the ignition, then read the plug. Seems like the cold read should provide all the evidence needed to identify a 2 stroke that is running rich or lean, but maybe there is more to it than I realize. I'd be interested in whatever the pound knows about this.
|
|
|
|
Post by lbo on Aug 3, 2008 5:41:03 GMT -5
My understanding, and I could be wrong, is that you want to see what the plug looks like at various throttle positions. At WOT to check the MAIN jet, at idle to 1/8 throttle for the jetting of the pilot and A/F screw, etc. Just pulling the plug cold can't show you what the plug looks like under WOT, especially if it idled or you drove slow before looking at it.
Plug chops, always, for me at least.
|
|
|
|
Post by hoove on Aug 3, 2008 7:43:08 GMT -5
Thanks Ibo. I'm trying to dial in my Stella. Just put a Sito + pipe on it and upjetted the main to 98. I am thinking of debluing the filter and know I'm probably going to have to go up to a 102 or 105 on the main jet and maybe even a 55/160 for the idle. The plug chopping makes sense for the different rpm's. Guess I'd better get some anti seize for the plug!
|
|
