did you check your u joints

You know the boat big johnson, hope I end up with it, probably gonna trade my scoot for it!

Under low/no load, the pump will rattle.  The front trust bearing is a double angular contact bearing...with both halves set up in the same direction, unlike a machine spindle bearing where they're set up opposite and preloaded against each other.  Without a thrust load, the bearing is very sloppy.  DO NOT run the pump unless it's under water.  The front of the shaft is flopping around enough to let the impeller contact the wear ring...especially with the typically mostly worn out bowl bushings that I find in about every pump I've ever taken apart. 

If its a new boat for you, go through the pump...not that expensive.  Then, depending on how hard you beat on it, change the thrust bearing evey year or 2.  If the pump thrust bearing gives up, you'll likely lose a crankshaft at the very least, or worst case scenario, the block too....the crankshaft will take all the thrust load. 

Cheap insurance.

Thanks andrew, I'm sure its not too big of a deal, I'm pumped on taking her for a spin, I'm gonna bend up some bars tomorrow, ill let you know how they turn out!

Trust, that boat runs.

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My boat does the same thing at idle.  does not matter if i am running on hose or in the river.  Took boat over to Jack at MPD and he said all looks good.  I am gonna run it for at least another season then get it rebuilt.  drop impeller to an AB from AA

A ranger with 450hp... Where do i sign up for that thrill ride

If there is any slop in the driveline between the engine and pump there will or can be rattle at idle if the engine is run with the pump unloaded.  Clearance can in the u-joint brgs themselves or between the splines of the yoke and the pump shaft.  Stainless and bronze impellors are more likely to rattle because they weigh more than aluminum.

the second he fired it up and let it run on the trailer with the pump hooked up i wouldve given him a  look and just got in my car and kept looking elsewhere. 

theres plenty of boats out there with owners that know a little more than this dude.  or at least lowball him on the price and use that money for a pump rebuild.

as stated a few times in this thread, its not the pump...its the driveline

who cares if its a bag of bricks tied to the balancer?  dont run the pump out of the water... but hey its your money.

who cares if its a bag of bricks tied to the balancer?  dont run the pump out of the water... but hey its your money.

oh god...idling the boat on the trailer for a short amount of time isnt the end of the world. 

McLure, who rebuilt my pump, told me to try not to run it on the trailer if at all possible. Also he said put at least 10 hours on the pump in the water before doing that.

I think that's not so bad as long as there's not a pile of sand in your pump and you hose it good before and during running and turn motor off at 20 secs.

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Not looking to debate here.....just trying to clarify if you're purchasing a boat, and the guy fires it up (with pump attached) to show you it runs....its not the end of the world for that pump, it will be ok.

Ya I agree, its not the best idea to run it out of water, I on the other hand have a jet boat already and have run it out of water with a hose hooked up plenty of times and havnt had an issue, it was mainly to show me it ran and to get a sample of the noise he politly told me about before making the trip to check it out, either way it won't shine me away from our deal he have going, test drive on elsinore in the mourning so we will see how it goes!

I've ridden in that boat once, I'd kill for another cruise with a wot blast. Hit me up if you're ever going to smellsomemore on a Sunday.

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