15,000$ Jet Ski. 99gp1200. Triple Pipes. Stage 3. My mechanic installed my new trued and welded crank shaft the rear seal blew out. After replacing the seal for the second time it blew out again just got back my jetski with another new rear seal for the third time. Will it blow out again?
seal is easy to put in backwards, i've heard. i know a mechanic who did that and it blew out. He told me to watch for it. Havent' replaced one myself so i couldn't tell you how to inspect it.
Posts: 2624 | Location: Louisville,KY/So.IN | Registered: August 04, 2001
quote:Originally posted by Gilbert: A weakened seal was a concern of mine when I decided to have my crankshaft welded. This is why I decided to pay a little extra money and have Riva do it. I figured, if they do this regularly then they should know how to control the heat. I doesn't take much to melt rubber.
Why on earth would anyone true& weld a crank with the rubber oil seals on??????? Do you have any clue about what your talking about? I don't think so!
Posts: 1830 | Location: Minneapolis | Registered: January 01, 2001
I just got finished installing trued and welded crank in a 65u ,Seals were pretty idiot prof.They would only go in one way.I would look else where for the problem ,need to pressure check engine .Did the dealer know enough to lube the seal before it was installed?I hope so.
Posts: 119 | Location: virginia | Registered: April 18, 2003
Once again I see you've been looking for me. Bashing my comments because your were insulted. Can't take your own medicine, too bad. You do need help, and you obviously don't know much about 2-strokes engines either.
Let Me Give You A Clue: In multi cylinder 2-stroke engines, each cylinder is isolated from the other, even within the crankcase. They have to be, that's how multi-cylinder 2-strokes operate. The only way to accomplish this isolation between chambers is to provide a seal between them.
How this seal is accomplished within the crankcase of a GPR I'm not positive; I did not take my crank apart, and I did'nt need to buy any bearings, But I did assume there would be a seal of some kind with in the bearing. Possibly they are sealed bearings, I don't know. Anyway seals at bearings are typically made of a soft material like rubber or something similar.
I hope I did'nt loose you yet, and I'm not sure your compitent enough to follow this, but, a crank bearing is a moving part with little steel balls or sometimes needle bearings that go round and round. They make very poor seals.
So you, in your limited capacity, can know try to explain to this poor guy who's looking for help, how this seal is accomplished.
I don't think 99GP.. posted his question to hear your typical BS about how many Hours you have on a PWC, or that you met someone important the makes impellers. And I'm daaamn sure he didn't post his message to hear your sarcastic remarks.
The 350 hours you so addimently bragged about on not 1, but 2 GPR's, and your 2400+ post are as empty as your brain.
Surprise surprise, I can dish it out too. Sorry about this 99GP.
Posts: 57 | Location: Tulsa, OK | Registered: May 17, 2003
A weakened seal was a concern of mine when I decided to have my crankshaft welded. This is why I decided to pay a little extra money and have Riva do it. I figured, if they do this regularly then they should know how to control the heat. I doesn't take much to melt rubber.
They are welding at the lower rod pins not at the crank main bearing area,also the center seals are called "Labyrinth seal" a mechanical seal.
If you dont know what you are talking about then you should not respond with half witted replys.
You remind me of the nerd that sits in the library all day long hoping to read something that they can partially grasp but never really understanding thoroughly to know what they are talking about.
I've split the cases and installed new cranks on GP1200s more times than you have removed the spark plugs in yours. I've also logged a good 450 hours on the GP1200 platform. Does that sound like I am bragging now?? Oh,,don't let me forget another 75 hours on the blaster1 and 50 hours on the blaster2 and 25 hours on the RXX and 10 hours on the XPL and 5 hours on the RX...
Give it up dude before you make a total fool of yourself. Or better yet, just go pull that crank out of your GPR and change those seals between the bearings that issolate each cylinder, you don't want them getting ruined from all that internally generated engine heat created by those high compression heads and advanced timing do you..LOL
Now if I could pressure test you instead of the cases, I bet I'd find out your about ready to blow!!! a seal.. LOL
But, I feel sorry for you; And I'm still not impressed. Only more convinced that your like a little boy yelling, "LOOK AT ME..LOOK AT ME".
I've gone through a WaveBlaster, SeaDoo and now I'm working on my Waverunner. Sorry, but I didn't count my hours like you did. I'm not a vain little twit. And besides, logging time spent on a PWC is not a federal requirement like flying an aircraft.
I'm an accomplised pilot (both fixed and rotor wing aircraft) and have earned my aerobatic rating. I've logged more than a 600hrs in aerobatics alone. I've been working on my own planes for over 12yrs and I'm still here to talk about it. With all my flying experience I would never boast or even consider myself an expert. There are too many other people much more talented.
For all your claimed experience, and bragging it sure doesn't show. You should have spent more time in school developing your brain.
What was your answer for this guy? The origional poster. Ooh, I forgot, you didn't provide one. Only another smartass comment directed toward me. You either very immature or need serious psychiatric help.
Forums are for people who wish to learn or share information. The kind of information that would be of value.
Your wanna-be a racer experience is not a concern of theirs nor mine. Bullsh!t walks, and you need to take a log jorney.
Hopefully, you'll make it down my way so we can test your pressure test theory. LOL
Posts: 57 | Location: Tulsa, OK | Registered: May 17, 2003
99GPTRIX for what it is worth I had a case on one off my older blaster that the crank had a slight warp on the rear side and caused the seal to fail. Yes it was a trueded and welded one and it took me replaceing the crank with another one to find the problem. check the crank if it's not that then u can rule it out.
It may have been damaged in transit or when installed.
Posts: 341 | Location: Pembroke,MA, USA | Registered: October 26, 2001
Once again I see you've been looking for me. Bashing my comments because your were insulted. Can't take your own medicine, too bad. You do need help, and you obviously don't know much about 2-strokes engines either. incorrect
Let Me Give You A Clue: In multi cylinder 2-stroke engines, each cylinder is isolated from the other, even within the crankcase. They have to be, that's how multi-cylinder 2-strokes operate. The only way to accomplish this isolation between chambers is to provide a seal between them. CORRECT
How this seal is accomplished within the crankcase of a GPR I'm not positive; I did not take my crank apart, and I did'nt need to buy any bearings, But I did assume there would be a seal of some kind with in the bearing. INCORRECT Possibly they are sealed bearings, INCORRECT I don't know. Anyway seals at bearings are typically made of a soft material like rubber or something similar. CORRECT
I hope I did'nt loose you yet, and I'm not sure your compitent enough to follow this, OUCH but, a crank bearing is a moving part with little steel balls or sometimes needle bearings that go round and round. They make very poor seals. CORRECT
Report cards go out in the morning. CRANK 101
Sorry Gilbert. Im not bashing im making light of the situation. Heck I have been wrong once, just ask my wife. OK ive been wrong many times, she will tell you. I really hope I dont see the inside of my motor any time soon. Mick
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