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I know this is automotive but I wasn’t sure where to post this
I have a 1994 xlt snomobile 2 stroke 3 cylinder
I ran seafoam through it and it made it run great ( it was bogging down on the bottom end) after running for a while I trusted it it was running actually quite nice so I thought I’ll let it run and ill go up the road to feed the horse maybe 100 yards up the road I came back and it had died and would start and run on what sounded like one cylinder for a short time. I pulled the plugs and looked at it and found a milky white substance in the cylinder and plugs head gasket maybe? I don’t know what else it would be?
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Today I pulled the carbs and cleaned them there was no white stuff in the bowl of the carb or anywhere. However some of the jets were plugged it looked like so I sprayed them out till I could see through them. The bowl was almost shiny clean on all of them. When I put it all back together it started first pull but died soon after and I think it was running on cleaner that was in the carb so my thinking is it has to be the fuel pump or filter I couldn’t get the filter off and I don’t have a new one but I will I might gas to cut it out and replace the hose is there a way to yes the pump?
It does have a mechanical pump I beleive.
It has one of these
Ahh, good old diaphragm pumps. usually those are good if they dont leak. You could disconnect the fuel line and see if it squirts gas when you turn the motor over. If it doesnt, it could also be that the pump isn’t able to suck the gas (aka plugged line or filter)
Well I messed with it some today and the pump seems to be working at least on one carb hose and I blew in he tank and gas came out the hose so I don’t think it’s plugged i think I’ll try a new set of plugs instead of cleaning the old ones over and over. I have a cold so I’m kinda pacing myself today 🙁
You could still have a clogged jet in the carb. I bet the seafoam dislodged some crap and clogged them up. How did you make out with the new sparkplugs?
I got new plugs and nothin so I did a compression check and there was 90psi in each cylinder almost exactly the same in each I don’t know what it’s supposed to be though. But still if I put gas or fuel directly into it it runs until it burns it all. Also the plugs are wet everytime I pull them maybe it is the gas doesn’t burn I added some fresh gas but it wasn’t much and wha was in there was probably a mix of one and 2 year old gas it’s only got about a quarter tank now.
Did you try draining all of your gas out and starting fresh? Also, are you using a quality 2 stroke oil?
Well I decided to try something I dunked a stick into the gas and then held a match up to the stick ( I walked away from the snowmobile first) and nothin happened it didn’t even try to burn so I’m guessing that’s what you call a gas fail haha so I plan on replacing the gas and see what happens.
I siphoned out and replaced the gas which it seemed to try to start now so just for kicks I pulled the drain screws on the front of the motor and the white milky stuff came oozing out so I just it drain for a while and tried to start it it popped a little so it must be getting better but then the rope broke :whistle:
I got the rope fixed and tried to start it still with nothing although the furthest right cylinder if your facing the direction of the sled has oil on it and smells like gas the middle one has beads of something on it smells like gas and the left one has nothing on it.
So funny story apparently between replacing the non combustible gas and cleaning the carbs I switched the left and middle plug I noticed this and switched it back and it started on the second pull! And the RPMs don’t climb by themselves any more and it doesn’t bog down. I also sprayed some carb cleaner on the crank seals and the RPMs didn’t change. However I did find that the secondary clutch can wiggle on the shaft a little anyone know if that’s normal?
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