well i thought i had it fixed. still missing?? when idleing up to oh 5-6 grand you can deffenetlly hear it come to life and pop once in awhile after that its hard to say it gets too loud to hear it anymore. now this is what ive done so far switched coils- plugs- wires- caps-reeds-been in the carbs cant find anything wrong. sprayed starting fluid everywhere no leaks? 150 psi all cyl guys im loosing it i cant rest till i get it it must be fireing good when i do full throttle short pulls then the pipe gets hot any more suggestions HELP ready to jump ship. dont want to go to that extreme also can the stator or cdi box have the effect of only messing up one cyl. i wouldent think so since they all fire at the same time thats why i havent questioned the trigger totally open to suggestions to try next thanks ERIC

Eric, I can't remember what you said about the coil itself on the plug cap you replaced? did you check the actual coil itself or just the cap? I'm crossing my fingers for ya and hoping that's what it is. We can still keep this a cheap fix!

bob

Yellow;
If you can get another cdi box, swap it out. Have you tried to hold your hand over that carb to choke it to see if it is fuel? It's simple... it's either fuel, ignition or compression...... an old guy told me that yeays ago! We'll find it....don't worry. Dweller

If its a pop that you are hearing you may be burning antifreeze.

Well, you've eliminated it being the spark plug leads and it's not your stator.
So, you either have prestone getting into that cylinder and it's having a tough time fireing check that by pressurising the system or you have a bad coil or one of the small leads that go to the coil are broken. (which haappens)

You have checked that carb right? Pilot jet not clogged?

going to try some more stuff today will keep you posted thanks guys!

Needle jet tube and pilot jets are clean? Is there any obstruction in the pipe or silencer on that cylinder? Is it getting fuel to that carb? Is there fuel in the pipe?

What exactly did you do when you cleaned the carbs? Like pulled them off and sprayed them down with carb cleaner or did you pull all the jets, inspect them and the check for varnish or settlement in the passages?

i used to work in a independent motor cycle repair shop if theres one thing i do well its carbs. they are in sync just switched over to 45 pilots new ones they are clean antifreeze question? i notice in my resevoir sometimes the level is way down almost empty than other times its totaly full is this normal also where do you get the pressure tester for that little cap.. im not ruling anything out and wont rest till its fixed woke up this morning its the first thing on my mind also ran it with silencer on and off same thing all float bowls full of gas when i disasemble them

Here are a couple things to try...first pull all your spark plugs and lay them on the cyl. head with the plug wires attached and pull your motor over to check spark at all three plugs if there is good spark if so then put about two squirts of gas into the spark plug hole of the cyl. that misses and reinstall all the plugs and pull the motor over it should run on all three for a few seconds...when the motor begins to mis fire then pull the PTO plug wire to see if the motor changes rpm if it doesn't then reinstall pto wire and pull center plug wire to see if rpm changes if it does stall you know that center cyl. is working, put plug wire back on center cyl. and do the same with mag. plug...let me know what it does...another thing to do is check the cdi pickup at the magneto if the air space is to big you will not have a good signal...a little trick is to open a paper matchbook and lay it on the magneto where the cdi pickup is and let it stick tight to the matchbook and tighten the cdi pickup screw and then remove the matchbook...your spark will be very strong...also check that you have a good ground from your coils...make sure that your spark plug wires are not crossed...hope this helps...Allen

Listen to Allen. He knows his stuff! Air gap... you wre looking at the timing! Did you move the trigger at all?

no maluchm never did mess with the trigger as it a real sob to work on without a mirror and wouldent hurt to be triple jointed either (ha) going back out to the garage to tinker some more.

You want to lock tite the trigger screws also...I have seen also the woodrif key that holds the magneto to the crank may have sheared, you can use a three arm puller to pull the magneto/flywheel...you can check the trigger wires for chafing with the magneto off...Allen. You can call me at my office 989-843-5441.

thanks allen working on the trigger right now going to pull the fly also just to check things out . running it again before i started operating pulled the airbox off and sprayed some gas into pto cyl no change honestly it didnt sound so bad so i took a hand full of rags and held them over each pipe the pto seems to be running . but what i cant understand is why the pto pipe doesent get as hot as mag or center also took pto plug out layed it on the head and ran it sparks like mad at all rpms ok back to the garage.

I yellow,

just to confirm, all your test and run's are on the stand......with no load?

Thanks,
Joe.

ive had it out back for a couple grass passes it runs like a scallded dog. but yes alot of running has been on the lift the pto cyl is running but the pipe doesent get as hot as center or mag it gets hot but not as hot. why??? dont know YET.

Eric, I don't know what crankshop pipes you have, sorry...Allen.

Not sure if this has been checked but Iam pretty sure those year sleds wore the wire harness under the engine maybe a wire touching.

ok i am putting this to rest i have come to the conclusion after lots of testing the cyl is running but not getting as hot as center and mag . im letting it lay for now as im very anal about how my sled runs and looks sometimes drives me nuts. what i really need now is some measureable snow so i can do some real testing under load. thank you everyone for chiming in trying to help without this site i dont know if this project would have ever came about thanks again ERIC

If it's only doing that on the stand I wouldn't worry too much about it. If you take it for a good run and it's still not getting hot or it's not performing then you have a problem. Two strokes aren't happy unless you load them down.

Let the snow fly soon then!!!

Good luck Eric!
Bob

well guess what i couldent leave it alone. so i tinkered with it all day and wound up pulling the head. just to make sure antifreeze wasnt getting in that cyl. no signs of anti freeze piston domes all look identical as far as burn goes. now when i pulled the pto cyl pipe thats the cyl thats not getting as hot i poured about 3 oz of oil out of it the others just normal oil. QUESTION is it possible that cyl is getting to much oil . honestly they all look over oiled now last year my pump arm was not returning and went through a gal in 100 mi . so i put a light helper return spring on it . QUESTION what do these pumps do when they go bad. i may be on to my problem i dont know ERIC sorry couldent leave it alone.

hey, this might help you, last year on my 2000 machZ i would have a very similar problem to yours, turned out it was the stator that would cause that, the statr was changed and it never did it again. My friend owns that machine now and he sais its problem fixed 100%.

A faulty oil pump was going to be my next suggestion as I have a similiar problem if I let mine idle too long. I'm pretty sure I need to replace the oil pump as it's currently using twice the oil it should be but it runs like a top when you drive it so I haven't really been that concerned. I plan to change it out eventually but I just don't have the time or "heated space" right now to do it so that job is going to have to wait ... if it wasn't using enough oil that would be a different story!

Sure it possible that it's getting too much oil but theoretically they should all be receiving the same amount. That's one of the reasons why I like to run premix...less mechanical failures possible and you know exactly how much oil you're using. Granted it's a constant ratio.

Everything you dumped out of the pipe is unburt fuel/oil mix.

I'm with Xcell,

All this running on a stand and a few passes aren't enough.
Stop searching and wait till you can actually drive it around.

Wait for snow....

Good luck,
Joe.

wipeing it down putting it backin the shed what i was trying accomplish is to get it as good as can so im not wrenching when its snowing. until the next problem ERIC

Choke hanging up on that carb??

thats a negative. there is a bug in it and soon as we get a couple of inches that bug is going to wish it never showed his face. hopfully . will see what happens

Wish you the best of luck with this pain in the arse problem! I guess a pretty simple thing to do to find out and make sure it's the oil not making the pto get hot, would simple be to drain/clamp off your oil resovoir and throw maybe a gallon or two of premix in there? Since its just on the stand, a nice constant oil mix wouldn't be all that bad. I know you've laid this to rest twice now, but none can ACTUALLY leave our sled problems alone now can we?

Bob

you know that song too much time on my hands they wrote that about me. if i only had a dollar for every hour ive worked on my sleds . not just wrenchin but painting polishing ect . lets just say i would have a nice stack they would be comping me at the nudy bar not complaining its a labor of love