Blaster overheating issue

teddy

teddy

Location
fl
Been out of riding for some time now. I just cant figure this one out.

Problem started when I sucked up a little sand. Everything seemed fine great flow out the pisser. Now about 1-2min of riding afterwords the ski got loud like no waterbox loud, Then noiticed steam coming out the pisser. Pulled up on the beach opened the hood through some water on the motor and chamber smoking hot, Ok i figured its just a clog blew through all lines opened up screw on headpipe some. The whole way in the heat sensor was tripping here and there. After this happened pisser stream was very week.

Got home went through just about everything, blew out all cooling lines,head pipe, threw on a new head gasket.

Next time out same poop, overheating, Got off in knee high water to open the hood everything is hot as hell, Now here is where poop gets weird, The long exhaust hose collapses then starts taking shape again, while taking its shape again it starts sucking water through like where it filled the w/b and part of the chamber WTF.

Home flushing out ski, finished. Started taking headpipe off, inside filled with water, now have some water in the cyl whatever put back togther ran it got water out. There is deffinitly a problem with water getting inside cyl every now and then.

took everything apart. pressure tested the cooling system, head,cyl,mani,head pipe, held pressure great, So wtf is going on. Can there be a possible hair line crack in a cooling port that only opens up when the motors at temp and let's water in??????? This prob only happens when the motor gets to temp, also some exhaust and steam comming out pisser. Now front cyl (the one with the problems) has some damage by the exhaust port from overheating.

Im 99% sure its from overheating problem.
Carbs 100% tuned
motor 62t/61x
msd,tdr w/b, fpp.

Any thoughts on whats going on?? should i buy a new cyl or trust my old one and just have it bored.
 
teddy

teddy

Location
fl
Fitting on the pump is fine, pump-mani cooling line still hooked up with no restrictions in the line.
 
teddy

teddy

Location
fl
kieran79 said:
Check the water fittings under the battery I bet one has come off
Click to expand...

If your talking about the straight fitting all is good. I went through all the lines and there all hooked up and clear. That was the first thing i went through.
 
teddy

teddy

Location
fl
garretonufer said:
what pipe are you running? maybe you have a cracked water jacket letting water from the cooling load up in your chamber?
Click to expand...

B pipe ltd,
I keep on thinking it's a cracked cooling jacket but tested everything under pressure and it held. Can there be a crack that only expands when the motor get's to temp????
 
kieran79

kieran79

Location
Australia
So you checked the fittings in the rear under the battery

Pump to back to ski then back of ski to fire wall then fire wall to motor ..... Dose that make scenes
 
teddy

teddy

Location
fl
kieran79 said:
So you checked the fittings in the rear under the battery

Pump to back to ski then back of ski to fire wall then fire wall to motor ..... Dose that make scenes
Click to expand...

From pump through hull through fire wall to the straight connection to mani all good lol. From pump to mani there's only one straight connection and that sits in the bilge.

Im 100% sure its not that checked all cooling lines.

The only thing i think it could be is.
cracked cooling jacket in head, cylinder, head pipe or mani, that only opens when ran at temp??
faulty msd??

Just remembering in the middle of all this riding/water testing. After overheating for the 1,000 time, I looked down and there was no water coming out the pisser, There was nothing i could do but get to shore safely rode about 10-20sec. That problem happened after all this other crap, So that didnt cause the problem but yes it added to the prob.

I would hate to throw $$ away but i think im going to have to try a new/different cyl and head, I gotta start ruling things out.
 
garretonufer

garretonufer

Location
Orange County, CA
pull your head and check your pistons. if they are clean then you have something in the motor area where the steam created by the water leakage is cleaning your pistons..

i had an issue like this and it turned out to be a fried head gasket, allowing compression to blow back through the cooling system.

but that doens't explain an exhaust chamber full of water.
 
snirunner24

snirunner24

Location
Lake St. Clair (MI)
If theres no water coming out of the pisser at all then I really don't think it could be a small crack. Theres alot of water that would have to pass through that hair line crack. It sounds like you ski is creation a vacuum, not sure how that would happen but its the only thing I keep thinking.
 
teddy

teddy

Location
fl
garretonufer said:
pull your head and check your pistons. if they are clean then you have something in the motor area where the steam created by the water leakage is cleaning your pistons..

i had an issue like this and it turned out to be a fried head gasket, allowing compression to blow back through the cooling system.

but that doens't explain an exhaust chamber full of water.
Click to expand...

I did use a new head gasket hoping that was the problem but same sh!it... The piston wash is fine.
 
teddy

teddy

Location
fl
snirunner24 said:
If theres no water coming out of the pisser at all then I really don't think it could be a small crack. Theres alot of water that would have to pass through that hair line crack. It sounds like you ski is creation a vacuum, not sure how that would happen but its the only thing I keep thinking.
Click to expand...

That day I had water getting into the motor. I went home went through all cooling lines again no clog so thats what leads me to believe there is a crack in a cooling port but pressure test shows it's good. went riding a week after that and had great flow for about 30min then it was like just spiting out again like it's been doing.
 
ryan

ryan

Location
baldwin ny
what brand headgasket are you using? it sounds like ya got a floter in there somewhere . i have seen small rocks or shell,s get stuck in the fittings and cause this to happen. back flush it it and it work fine for a few mins . you need to check every fitting in that ski.
 
Last edited:
teddy

teddy

Location
fl
Ryan I went through all fittings took them all off about 10 times. went through the head pipe blasted 150psi through, I took all the screws out stuck a wire through the holes, stuck a wire through headpipe cooling one end to the other, filled headpipe up with water and closed one side to see if theres any leaks under pressure all was good. I also backed flushed the hell out of it.. stock head gasket looked good when i took it off, I got a wsm gasket giving to me that seems the same as stock.
 
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