Super Jet What would case a SJ to have heavy white smoke?

Big Kahuna

Administrator
Location
Tuscaloosa, AL
I know 2 strokes smoke, but this is apparently POURING out. It didn't smoke like this last season. I have not seen the ski yet, only going off what the owner tells me. Steam in the cylinder made me think head gasket, I've been told that can also cause white smoke? Maybe its just bad/old oil from sitting all winter. What's the best oil to you? I'll flush it all out with fresh premix. Still doesn't explain steam in the cylinder though. I really hope its nothing major.

did he pour oil down into the cases to winterize it? KEVBO hit the nail on the head, white smoke from steam would only happen in the water or with water hooked up to it.
 
Well he ran it off the hose and it still smoked just as bad. He described it as POURING out. So what would cause white smoke with no water?
 
Location
fl
if it was sitting all winter and not properly winterised maby there's some water in the gas.im not sure if that could cause steam in the cyl but it's a possibility. has the gas been dumped out and started with freash gas?? what mixture is he running??
why doesent the guy that own's the ski take the head off and have a look in there it's not that hard to do.
 
Location
fl
how's the throttle response. does it bog,sputter,is the carb clooged up??
is the guy using the wright gas?
you really have to go there in person and check it out..

maby the guy is color blind and cant see that the smoke is really blue
 
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40:1 yamalube oil. I think it was winterized. The Guy torn his shoulder up and just getting out of the sport. He didn't realize it was smoking until he started it up this year, it was something that developed over the winter. Any other suggestions on the white smoke?
 
It might be something minor and him just over exaggerating it. Almost all skis smoke good bit, maybe he just thinks its worse then it is? Either way if you could get it for $2500 it sounds like a decent deal. Worst case scenario get a shortblock from sbt for another $500 (i think i heard thats how much they run with core exchange) and have a nice ski with a new motor for $3000 plus a little labor


i know the last time i started my ski out of the water after it was winterized i was surprise to see how much it smoked
 
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did anyone shake the tank up? oil will settle at the bottom of the tank, and get picked up by the fuel pick ups causing heavy smoke. drive it around on the trailer for 5 minutes and try again.
 
I just found out the ski has not been winterized the last 3 seasons, but it does seem to rev up fine, just smokes a LOT! So a winterized ski getting warmed up is out of the question,it was also run on the hose for a solid 15 minutes with no signs of the smoke going away,also run off for a little, no change. Any suggestions?
 

OCD Solutions

Original, Clean and Dependable Solutions
Location
Rentz, GA
I say the cases were flooded at the end of the season or during storage due to tank pressure pushing oil/fuel past the seats. The gas evaporates off leaving just excess oil in the cases.

My X-Scream engine came loaded up with oil from assembly and it belched whitish/blue smoke everytime I started it up in the garage. Once I put the ski on the water and rode it around a bit, the smoke went down to normal levels and has never returned.
 

Tyler Zane

Open Your Eyes
i think your over thinking it all. if a 2 stroke isnt smoking something is wrong. the color of the smoke really doesnt matter if its out of water... hell mine smokes white, so does my 550 and my 4 wheeler, weedeater.... 4 strokes that are burning crank cases oil smoke black.
 
So you suggest cleaning out the tank, put new premix in and ride it? What oil should I go with? Any other suggestions before running it? I am going to check the compression again, plugs, pistons and go from there. Still the oil settling doesn't explain the steam in the cylinder though? I still think there is something wrong, but if it blows up, then maybe I'll either rebuild the short block or get a new one like a 718.
 
Location
baldwin ny
if he was running castor 927 the oil will settle to the bottom of the tank and make it smoke like crazy. your best bet is to not buy it anf just tell me where it is. lol j.k. buy it and run it.
 
Location
fl
your best bet is to not buy it anf just tell me where it is. lol j.k.

im thinking the same thing ryan..

its a 2 stroke its going to smoke you could tell by the pic on cl look at the oil out of the exhaust

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Tyler Zane

Open Your Eyes
So you suggest cleaning out the tank, put new premix in and ride it? What oil should I go with? Any other suggestions before running it? I am going to check the compression again, plugs, pistons and go from there. Still the oil settling doesn't explain the steam in the cylinder though? I still think there is something wrong, but if it blows up, then maybe I'll either rebuild the short block or get a new one like a 718.

i suggest you go ride it and have fun. you said it had 150 in both cylinders... that rules out many problems you have reviewed. take it for a water test and if it runs good and strong, buy it. worry more when you see it not smoking.
 
Location
fl
i dont understand have you seen the ski in person? did you buy it yet?? or are you just talking to the seller??
just empty the gas and start with fresh gas and ride the ski like i said in my other post...
it seems like you want to here about how many problems there could be wrong wit the ski.if your unsure then dont buy it.there are plenty of ski's for sale on the x...
 
Why don't you take a video and post it on here? I feel like you keep saying the same thing over and over without having any more information about the issue. If it's got 150 in both holes then it's not a gasket or o-ring. If it was the exterior o-ring, I'm assuming aftermarket head, then it wouldn't be getting in the cylinder anyways.

I was going to suggest that it was fogged but it sounds like you ruled that out.
 
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