SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: farmergord on August 19, 2010, 06:30:50 PM
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as we were idling back in the nowake zone the jet started to make an intermitant chirping noise . it has oil in it and throughout my whole rebuild I never touched the jet.any ideas?????
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I would put a thrust bearing in that pump before you use it again. You have no idea of the history of that little bearings...and it when it blows up it can take a whole lot of expensive stuff down with it.
That being said, the chirping you hear very well might be what is refered to as "pump rattle"....it's a combination of spline slop and shaft vibrations from the thrust bearing not being loaded much under idle.
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is it wise to just go ahead and rebuild the whole pump
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If you've never done it and you don't know the history of it...yes. Anything with moving parts that you buy used as an assembly should be looked at as a rebuildable core...nothing more than that...and certainly not a usable part.
Best to rebuild now while it's still functioning then wait till there's nothing rebuildable left.
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as we were idling back in the nowake zone the jet started to make an intermitant chirping noise . it has oil in it and throughout my whole rebuild I never touched the jet.any ideas?????
Gord refresh my memory which jet drive ? and re "intermittent" is it at all speeds , just at idle ? etc Tom
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Tom its a JB with an A impeller and it started at idle and we never reved over idle after that due to an engine oil leak just put it back on the trailer and hauled it home
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re-read and edited today , my hunch is maybe motor vs Jet (noise source) hope I'm wrong jet bearings and drivelines typically manifest as clunking and growling/grumbling noises vs "chirping" Tom
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got a bird somewhere in there lol :)