IDoSeaDoo
Well-Known Member
Hey guys, I think I found a malicious pattern here. I've been rockin' the 787 for a while now and in the past few years have had really bad luck with them. My '97 Challenger blew up several times. I forget now all the problems, but I know I lost two cranks on this boat. That's pretty crazy if you think about it. I also JUST lost one on an XP that I put a new crank into. It maybe had 30 hours on it. I also have been having RAVE problems. They kept running hot and melting the plastic piston. I thought they were prematurely wearing out, spewing oil everywhere and generally give me trouble. I would go through a set per season. It got so bad, that I decided to ditch the 787 and shoehorn a 4tec into my Challenger.
Well, as I was taking apart the XP, I noticed that the drain line from the back of the cylinders was clogged with about 8" of muck and sand. I have no clue how long it was like that. I made a mental note and posted to the 2-stroke PWC forum, suspecting that maybe that's why my crank died. Well, I'm in the process of cleaning my Challenger (whose last failure was a crank) for the 4tec conversion. Tonight I removed the outlet muffler and BEHOLD, I saw a rock jammed in the fitting that is for that same hose that was clogged on the XP. I had very similar problems on both crafts and similar engine failures. And BOTH had clogged cylinder outlet lines. Guys, CHECK THIS TODAY! At least before you take your next ride. I tested to see if I could blow those rocks through, so I simulated it being on the boat: attached a hose to it and blew 120Psi into it. The rocks flew right though. Please, check this on your craft, be it a 587 or 951. They all have that drain line, and it's apparently very susceptible to clogging. Post if you've found a similar condition on your craft.
PS if this line is clogged, you will not know. This does not affect the stream(s) coming out the rear. The engine WILL run and the overheat buzzer will not come on.
Well, as I was taking apart the XP, I noticed that the drain line from the back of the cylinders was clogged with about 8" of muck and sand. I have no clue how long it was like that. I made a mental note and posted to the 2-stroke PWC forum, suspecting that maybe that's why my crank died. Well, I'm in the process of cleaning my Challenger (whose last failure was a crank) for the 4tec conversion. Tonight I removed the outlet muffler and BEHOLD, I saw a rock jammed in the fitting that is for that same hose that was clogged on the XP. I had very similar problems on both crafts and similar engine failures. And BOTH had clogged cylinder outlet lines. Guys, CHECK THIS TODAY! At least before you take your next ride. I tested to see if I could blow those rocks through, so I simulated it being on the boat: attached a hose to it and blew 120Psi into it. The rocks flew right though. Please, check this on your craft, be it a 587 or 951. They all have that drain line, and it's apparently very susceptible to clogging. Post if you've found a similar condition on your craft.
PS if this line is clogged, you will not know. This does not affect the stream(s) coming out the rear. The engine WILL run and the overheat buzzer will not come on.
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