SoCal Jet Boats
Discussion => The No Wake Zone => Topic started by: icecreaman on October 07, 2012, 10:10:44 PM
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Well my very short river season ended rather abruptly Saturday. I have been doing a resto on my Ultra for the better part of 2 years. We took it out to Elsinore to do the first shake down, hoping everything would go well enough so we could join the group at Avi next weekend. Well about 3/4 of lap around the lake I guess my motor over powered my used bowl. I did a little burst and at about 4800 rpm I heard a big bang and the boat nosed over. "Houston, I think we have a problem!"
[attach=1][attachimg=1]
Oh well, I guess I'll have an early start on next year. I hope you guy's all have fun next weekend. We'll meet up at the next one.
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On the upside of things u can get a real good look at ur impeller judging from the pic impeller looks in good shape,,, sorry for bad luck out there today and good luck with the rebuild.
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nothing a little 5200 couldnt fix... >:D
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man that stinks sorry but i enjoyed ur build thread soo im looking forward to reading this one :beer: :beer: :beer:
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Bummer.. story of boat ownership. Nice steering cable.
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Where are your bowl bolts? I can't see in the pic if they all broke off. I don't see how you could have had excessive pressure at 4800rpm, besides excessive pressure would have broken it in a different way, maybe, saw a pic from someone here that showed the bowl breaking in half.
What exactly happened here ???
If all the bolts did break were they grade 8 or better?
I gotta know :o :o :o
You can get this thing back together and ready for this weekend at AVI :thumbup:
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Bowl bolts too short ???
It does not look like the mating surface of the bowl is broken out around the threads.
Interested to find out what the cause was.
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Is there a hole in the bowl, can be for sure
With the pic
And what happend to the bolts, they must
Have been soft steel to sheer off
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The threads pulled from the bowl. A few people have come to the same conclusion that the bolts were to short. The bolts I used were all brand new 1 1/2" stainless. The depth of the hole in the bowl is barely 1" deep. I used the longest bolt I could get in there. About half the bolts were still in the housing when we got it on the trailer. You can still see the blue lock-tite on the threads. I think the threads were a little too degraded in the used bowl. In hind sight, 2 bolts didn't feel great when I did my final torque. I told myself the next time I pull this bowl off I'm going to install SS inserts to all the holes. Well that time just got here a lot sooner than I had anticipated. I think I underestimated the force generated when you up the horse power significantly. I also put in a B1 racing loader, feeding a bronze A impeller. Nothing crazy, but everything was tight in this pump. I'm going to talk with Chris at B1 and see what he thinks about drilling and double bolting the bowl. I asked on PB back when I was building the pump and was told this was not necessary unless you were pushing 1000 hp or more. I'm guessing I'm in the 750 hp neighborhood, I didn't get to dyno the motor like I wanted to, yet! I'm just glad I still have all my parts, that's a fare chunk of change hanging on those cables.
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wouldnt it be stronger to through bolt them all instead of inserts?
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Glad it stayed attached for you. I spent alot on the same parts myself.
wouldnt it be stronger to through bolt them all instead of inserts?
You can't through bolt a bowl
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Glad it stayed attached for you. I spent alot on the same parts myself.
You can't through bolt a bowl
oh whoops i was just lookin at the part thats still on the boat. still cant believe theres so much pressure there that it blew it off. crazy.
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In order for you to time-zert the holes, you need to jump up two sizes to achieve same bolt thread size. Might want to call Tom at jet boat performance for details on bowl wall thickness ect....
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I wouldnt bother fixing something that failed once. Get another bowl.
Be glad that your pump is set back otherwise you would have lost the whole boat.