Exhaust rubber hose keeps blowing holes..THIS IS INSANE

[bookerb1047]

1996 Challenger 787 (new engine from Seadoo) 12-13 hours on it. (Dealer Installed)

Last week we took out the boat and at high rpms and a hole formed in the new exhaust hose (the one between the manifold and resonator). I checked the Rave Valves and did not see any blockage. I installed another rubber pipe with metal piping "looks like a spring inbedded in the rubber". After running it at 6,000 another hole the size of a half dollar appeared in the same exact position as the first one that formed a hole in it. It doesnt looked burned or melted. Could it be blockage in the resonator? If so how would I check this? I have read through the post about this issue aleady and it offered no insight, as mine is blowing holes in it. Water does run out the exhaust in the yard and while in the water it does release steam from the pipe when over 5,000 rpms.

No problems when at low rpms.

Thanks in advance for anyone who has figured this out.

Booker

(glad I had ear plugs in the boat that was loud!)

 

[Phildoo]

Strange as this sounds.. Has the 2 hoses been off the water regulator on the resonator? I got mine backwards once and it will super heat the exhaust. Water still flows visually. It took a member on here to spot the problem.

 

[bookerb1047]

Are you talking about the two very small black rubber hoses that run water to the rave valve on the resonator?

 

[Phildoo]

Yes. Exhaust got so hot it changed the color from silver to gold on the exhaust and I blew a monster hole in one of big rubber hoses.

 

[Phildoo]

You won't get the overheat alarm either. Only if engine overheats. Not the exhaust.

 

[Phildoo]

Possible that regulator is bad also.

 

[bookerb1047]

Thanks for the reply! I will start in on pullin the resonator and checking it out for damage. I will also try switching the hoses. Anyone have any pictures on which hose gets clamped to the correct fitting?

 

[Phildoo]

On my twins the top goes to the exhaust. The bottom to the "T" fitting.

 

[bookerb1047]

Great! I will make sure when I get home to check that out. I am determined to go out once without a problem. I know I can one day, once you get these machines right they seem to run forever..