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performancex 12-27-2002, 08:35 PM The pic isn't the best, but the one on the left is more brownish, the one on the right is more black. http://www.snowmobileworld.com/home/performancex/images/plugs.jpg I'm really just trying to learn something here. permafrost 12-27-2002, 08:41 PM i would guess the one on the right as it is blacker NHIcegator 12-27-2002, 08:43 PM :withstupid: Me too,but just looking at plugs with no idea what they came out of and the history behind them makes it kinda hard. performancex 12-27-2002, 09:34 PM They've got 150-200 miles on them. The left (brown) is from the clutch side. They're from my Yamamutt. sled-head 12-27-2002, 10:00 PM I say the right also..........although it doesnt look that bad in the picture Tattoo3235 12-27-2002, 10:18 PM If I had to pick, I would say the right one. Although neither looks real bad. Joe Enginerd 12-27-2002, 10:34 PM If they were mine, I wouldn't worry about which one fouled and donate both of them to the local landfill. You really need to re-evaluate your jetting. Does it leave a trail of black smoke and snow as you go down the trail? ??? dwhee 12-27-2002, 10:39 PM Wow, I impressed myself I picked the right without looking at your posts. :D I usually just change all plugs when one goes bad, but now that I have a tripple that may have to change. $$you know. :withstupid: Any suggestions about that? :sarcasm: BearCat2003 12-28-2002, 05:41 AM Does it leave a trail of black smoke and snow as you go down the trail? It's a two-stroke isn't it?? :p Just kidding!But I do love my 4-stroke!! :inlove: :inlove: IndySKS 12-28-2002, 07:43 AM I'm with Enginerd on this one , just toss both of them and start fresh with 2 new plugs and them look for causes or problems from there . For 3 bucks a piece it ain't worth worrying about . Oh and when I said toss them I didn't mean into the lake or bush , that landfill is a great resting place for them . I did pick the right one as well as being fouled . Formulaman 12-28-2002, 10:34 AM Why would you say it's fouled was the sled miss-firing on one cyl? They are a little black but were they pulled out after a WOT run and shut down right away? Because they will get black if you sit and idle for few mins ;) performancex 01-02-2003, 04:46 PM Some of you guys are drawing some pretty wild conclusions. I didn't have any problems, and neither plug is fouled. I've put 90 miles on these plugs since, and they're still OK. But, what is the difference between brown and black? Heat/cold? Rich/lean? This is really what I want to know. NHIcegator 01-02-2003, 04:55 PM If it's a fan cooled motor it's not uncommon for the clutch side to burn a little hotter,less cold air flow on that side. performancex 01-02-2003, 05:15 PM So brown is a hotter burn than black? machz69 01-02-2003, 05:43 PM well i cant realy tell from the pic but they look ok the black one looks a little rich or even like a little anti-freeze. but both should run.....lol NHIcegator 01-02-2003, 05:44 PM Originally posted by performancex@Jan 2 2003, 05:15 PM So brown is a hotter burn than black? Yes,that's what it looks like to me ;) ZR Rider 01-03-2003, 11:35 AM Mach... the plugs are out of a Phazer... no aint-freeze!! lol My old Phazer did the same thing, unless it was really cold the plugs were different colors! :thumbsup: highlandergerman 01-03-2003, 05:18 PM just can them both, and give er heck, plugs are cheap. NHIcegator 01-03-2003, 05:27 PM If it's a fan cooled single carb sled you can't do much about it. If it's dual carbs you may be able to match them with some fine tuning. Steven Hohman 01-03-2003, 07:23 PM Most phazers are dual-carb models, I've also noticed this with mine, the left (clutch side) is lighter than the right (fan side) plugs. | ||