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Old    Jon Hunter (hunter660)      Join Date: Aug 2007       07-17-2010, 6:16 PM Reply   
I replaced the water pump on my LTR last year do to it leaking. Now my new pump is squealing. I pulled the belt and it is just the idler. Does the whole pump need to be replaced? Can I swap out the bearings? WD40? Duct Tape?

Thanks, I need to get back on the water.
Old    Josh C (pcolajosh)      Join Date: May 2007       07-19-2010, 8:51 AM Reply   
Are you talking about the raw water impeller pump assembly or the water recirculation pump for the engine? Or are you talking about the idler pulley that tensions the belt?

While most pumps can be rebuilt, it's often easier to just replace the pump. For example, the recirculation pump I replaced only cost $90.
Old    Jon Hunter (hunter660)      Join Date: Aug 2007       07-19-2010, 8:54 AM Reply   
recirculation pump

I took it off and the impeller is also cracked. I was told there is a 1 year waranty and I should have one on my front porch Wednesday. Any idea why I have gone through 2 in two years?
Old    Ian Scarlet (imscarlet)      Join Date: Mar 2008       07-19-2010, 1:46 PM Reply   
Is it a marine or automotive one? Marine ones should have a brass impeller that don't usually crack
Old    Jon Hunter (hunter660)      Join Date: Aug 2007       07-19-2010, 1:47 PM Reply   
??? It came from Mastercraft.
Old    Josh C (pcolajosh)      Join Date: May 2007       07-19-2010, 5:33 PM Reply   
Good to hear that you're covered with some warranty action. As far as quick failure, I don't know. Maybe you sucked up some sand in the intake and it circulated through to the impeller blades of the recirc pump? Kind of a stretch, but all I can come up with. How about posting a pic of the impeller that cracked.

Ian, on the LTR motors, the recirc pump is not like an automotive one. They're not interchangeable at all. The marine one is a sealed unit and the automotive water pump for a chevy 350 uses the block as a sealing/water routing surface.
Old    Jon Hunter (hunter660)      Join Date: Aug 2007       07-19-2010, 6:40 PM Reply   
Old    Jon Hunter (hunter660)      Join Date: Aug 2007       08-02-2010, 11:27 AM Reply   
Looks like this isn't the end of my troubles. I installed the new pump and the problem was solved, or so I thought. After the first trip back on the water I noticed the belt had worked its way one grove toward the rear of the boat. No big deal I thought, I just didn't get it on all the pulleys correctly the first time. I put it back on correctly this time. After the next trip to the lake I looked at it and it is now a 1/3 of the way off and the belt is shredding. What is going on? I never had this problem before. Also, there is still a noise from the engine. I have a new pump, alt was replaced last year, and the tensioner turn smoothly and free by hand with not noticeable play in it.
Old    Seahawks #1 Fan Robert T (cwb4me)      Join Date: Apr 2010       08-02-2010, 11:55 AM Reply   
check crankshaft end play and all pulley alignment or something is loose.
Old    Jeff D (Jeff)      Join Date: May 2010       08-04-2010, 7:13 AM Reply   
Early LTRs are known for their weak alternator brackets. They crack and then allow the alternator to move the belt out. There was a recall on it but it has since expired I think.

So, inspect that bracket closely.
Old    Jon Hunter (hunter660)      Join Date: Aug 2007       08-04-2010, 7:16 AM Reply   
Thanks. I found out some information yesterday. The upgraded alternator brackets are still free, but my dealer didn't have them in stock. There is an upgraded water pump pulley that is not free, but my dealer had it in stock and is headed my way. I'll update this post as I learn more.
Old    Matt Crowe (crowem87)      Join Date: Nov 2005       08-04-2010, 9:58 AM Reply   
Jon, You say the alternator brackets are still free? Please let me know about this, and if there is any way you could PM me some documentation of this I would truly appreciate it. Our bracket went bad, we spent years trying to figure out what it was and went through almost 6+ alternators before someone realized it was the bracket. I think we also paid for the part as well and i know it was not cheap. ughghhga

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