I Been fighting a sparkplug problem for 2 years!!!!

IWantATurbo · Nov 25, 2008

i have an 02 summit 827 151. 2 years ago it started fowling plugs. it would junk the plug no fixing it. i put new plug in and it would run great for rest of the day. then it did it 4 times in one day. limped home. i put a coil pack on it from a difrent 02 800 summit. sweet it fixed it (so i thought) then the last ride last year it did it again. no biggy put a new plug in it. did it again in 2 mins. limped it home and have not done any thing with it.

what could be wrong with it? it runs spot on when it runs.

it must be burning the middle out of the plug bc they are junk when it does it.

plugs look great when i take them out?

is it in the carbs or the elc?

Please help!!!!

IWantATurbo · Nov 25, 2008

the plugs never spark again in any sled after they have been in this one.

when i changed coils i changed wires and plugs all at the same time. could be a ground problem?? ill look in to that.

denseo plugs seem to work the longest, think most are br9es that i use.

07 Phazer · Nov 25, 2008

Is your problem on one cyl. or both? Had a Mach Z do the same thing years ago, turned out to be cracked O rings allowing in enough coolant to foul plug's but not enough that you could smell or see smoke from it. Good luck.

banditpowdercoat · Nov 25, 2008

Have you tried checking the resistance of a dead plug? Is it oil fouling so that it is shorting out? Or is iot melting/burning the center electrode apart inside the Insulator? Usually, we take old plugs, but them on a gas burner stove, bake them cherry red fro 1/2 hr. This vaporizes all the oil and carbon traces off and they work again. usual cause from fouling is the oil will make a carbon trace on the insulator, This becomes conductive and effectively shorts the plug.

What Oil Mix you running? Still injected, how much oil do you go through. This used to be real common on old 2 stroke bikes running 32:1 oil mix

teeroy · Nov 25, 2008

reeds maybe? my buddy's summit was fouling plugs, reeds on one side were chipped and cracked. would only foul them at slower speeds, ran good at wot. also was a pain to start sometimes, poor atomization I guess.

IWantATurbo · Nov 25, 2008

I don't know if it is both or just one? i sleep sence then!!! LOL

these plugs are junk i have cleaned lots of plugs and reused them not these ones.

don't think it is an oil problem and no coolent has been used sence i got the sled.

it is never hard to start un less one plug is dead.

never thought about the reeds, guess i can look at tehm.

H20SKE · Nov 25, 2008

I have had the same thing happen---runs great for several rides then starts dumping plugs--maybe once--maybe several times in a ride. I tried all sorts of different things--It turned out to be the pick up on the flywheel--half the bracket for the pick up was broken--so it would move when I would hit a bump or hill just right.

Just another thing to check--it is easy to check and easier to replace.

Good luck.

H20SKE...

IWantATurbo · Nov 25, 2008

so i take the pull start off to look at that right?

Bushpilot · Nov 25, 2008

Sounds like either a ground issue or what about you voltage regulator.

have seen issues with the stators on these sleds but it is usually the stator going out.

banditpowdercoat · Nov 25, 2008

Isnt the Ignition circuit separate from the lighting circuit? The lighting circuit has the voltage reg on it, does it not?? Been a while since I looked

drmiller100 · Nov 25, 2008

both plugs fire at the same time - they do it every 180 degrees of crankshaft.

i have seen wires go bad causing weak spark to both plugs. on some coils you can unscrew the wire from the coil and do an ohm test on them. there are specs out there somewhere.

IWantATurbo · Nov 25, 2008

should have been working on mine but i was working on this instead. just came in the mail an hour ago

banditpowdercoat · Nov 25, 2008

WTH?? Where did you find that? I want to get my 4 yr old daughter something like that. Since Mini Z's are no longer sold, and she's to small for a z120.

Hook a brotha up with a link

IWantATurbo · Nov 25, 2008

got it off ebay $420 shipped to my door.

autowrench · Nov 25, 2008

Is the problem mainly on starting or just random during the ride? I changed wires last winter after a starting/ quick fouling problem last winter. Choke cables seem to be weak on zx's too.
Tom

IWantATurbo · Nov 25, 2008

very random during the ride, always starts great if plugs are good.

mountainbigbull · Nov 25, 2008

On my 02 had the DPM lines loose the seal around on the carb fitting. So I would have a bog when I was in deep powder working the sled hard. So I was loosing vacuum and would go to a rich mixture. Pulled out the plugs a few times trying to figure out what was wrong and never seen a lot of oil on them. Check the pto side carb i think it might get some heat from the clutches and deteriorated the plastic line. Mabye on your sled you are getting some rich mixtures at times and ends up fouling the plug. Maybe not but worth checking those DPM lines.

IWantATurbo · Nov 26, 2008

i can check that too.

Bigrock33 · Nov 26, 2008

Jetting? - as the engine gets a little worn and if the jetting was on the "edge" to begin with, might just be a jet issue. Happened once, took a season to figure it out, and only then while talking to an "elderly" sledder/mechanic. Fixed it in less than a 1/2 hour, no issues since, that was 2 years ago on a mountain max. Had a bad plug cap once as well causing some fouling. Good luck

SnowXTC · Nov 26, 2008

On my daughter's 600 the fuel pump was bad, I rebuilt it to no avail. Finally replaced it and put Mikuni's on it and it runs good. Hubby rides it most of the time since his sled seems to be permenantly parked in the garage.

I Been fighting a sparkplug problem for 2 years!!!!

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