Super Jet Compression holds, but milky rear plug threads

[Al//gsx//sj]

the ski runs ok and i think there is a carb/fuel delivery problem, but shouldn't be related. ran it on the hose and the rear plug threads came out milky. it's a 701 w/Blowsion head, compression is 180 front, 170 rear and both hold for 1 minute. Can someone explain this? seams contradictory to me…

 

[mademan9]

180 and 170? The head was reading 180 on both cyclinders before it left

 

[Freakrider]

sounds like water is leaking into the rear bore o-ring...fuel + water = milky.

 

[Al//gsx//sj]

i agree, but isn't 10psi within spec's?

 

[mademan9]

i agree, but isn't 10psi within spec's?

not sure

 

[tipafew]

The 10 PSI might be enough for me to put a top end in during the off season, but I would probably keep riding it and not mess up the middle of my summer.
I agree that milky always means water.

 

[jetpilot36]

one cylinder should not be more than 10 percent different from the other cylinder.so in your case 18 psi is out of spec.so 10 psi dfference is acceptable.dont ask me where i got this info.i forgot.

 

[matth113]

x2 jetpilot Might be a o ring thats not lined up correctly?

 

[aramis]

you didn't turn on the hose before starting the engine by any chance, did you? what type of exhaust do you have?

 

[Al//gsx//sj]

no, but as a side note, we've checked it at the lake a couple of times with the same results. the ski runs and has no problems doing power slides, huge subs, tailstands, nose stabs, etc., we're just trying to figure out what would cause milky threads with good compression. it's a very old Pro-Tech Mach or Mach 1

 

[augustaf]

the sealing surfaces of the exhaust manifold can corrode and cause water intrusion, engine would still run fine. I did not read that someplace, I been there.

 

[Idok]

the sealing surfaces of the exhaust manifold can corrode and cause water intrusion, engine would still run fine. I did not read that someplace, I been there.

its true! Fred is older than corrosion!

 

[DEVIN]

Well Theres your problem

So after fighting with this i finally busted the pipe off. Only to find the the gasket had the piece missing that is attached between the exhaust and water cooling system. so once my new gaskets come in the mail hopefully i can finish off strong. BACK-FLIP here i come.

P.S. Tell mother i love her.