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Flatwaterfooter
07-14-2007, 04:13 PM
need the part number for my Prostar 190 lt-1 water pump.

TMCNo1
07-14-2007, 04:45 PM
need the part number for my Prostar 190 lt-1 water pump.
Raw water or circulating pump?

Flatwaterfooter
07-14-2007, 06:52 PM
Circulating please. water is coming out like crazy. Thanks

billr
07-14-2007, 07:17 PM
Go to your local Chevy dealer, with year of your "Corvette".

School Skier
07-14-2007, 08:37 PM
Try SKIDIM for the number thery're great to do business with.

TMCNo1
07-15-2007, 08:43 AM
IIRC, EngineNut (Indmar employee) says the water pumps on marine engines are somewhat different than the normal GM OEM pumps. I would go with a marine specific replacement.:twocents:

Skidim does not sell the LT1 pump, but may be able to advise, otherwise your MC dealer may be your best bet,http://www.skidim.com/products.asp?dept=1095

Engine Nut
07-15-2007, 09:50 AM
IIRC, EngineNut (Indmar employee) says the water pumps on marine engines are somewhat different than the normal GM OEM pumps. I would go with a marine specific replacement.:twocents:

Skidim does not sell the LT1 pump, but may be able to advise, otherwise your MC dealer may be your best bet,http://www.skidim.com/products.asp?dept=1095


The pump is Indmar Pn S556050 or MasterCraft P/N 81556050.

Engine Nut

Flatwaterfooter
07-15-2007, 10:14 AM
Thats the one. Thank you

TMCNo1
07-15-2007, 10:42 AM
The pump is Indmar Pn S556050 or MasterCraft P/N 81556050.

Engine Nut


That's our Engine Nut, thanks, life is good!

billr
07-15-2007, 03:22 PM
The parts manager from the Mastercraft dealer suggested I go to the Chevy dealer for my waterpump. I took the old one with me to compare. The pumps are the same, even down to the casting numbers. The only exception is both heater hose outlets are on the one from the Chevy dealer.

Engine Nut
07-16-2007, 04:19 PM
The parts manager from the Mastercraft dealer suggested I go to the Chevy dealer for my waterpump. I took the old one with me to compare. The pumps are the same, even down to the casting numbers. The only exception is both heater hose outlets are on the one from the Chevy dealer.

Check to see if it has a thermostat installed in the pump. If it does it is probably not the same as the one that we install in the pump ... a 160 with bypass holes.

Engine Nut

billr
07-16-2007, 06:39 PM
I had a new 160 thermostat to replace the factory 140.

Flatwaterfooter
07-16-2007, 09:31 PM
I called the dealer and they could not find those part numbers.

billr
07-16-2007, 09:39 PM
I didn't use part numbers. I just asked for a water pump for a 96' ( in my case) corvette, 5.7 liter LT1. The water pump was available by order from NAPA and Advance Auto Parts, and O'Brien Auto Parts. The Chevy dealer had one in stock, so I went there to compare the pump.

Flatwaterfooter
07-16-2007, 09:43 PM
No problem getting it from there and it worked fine. What did you end up paying if you do not mind me asking. Waiting for a call back from the dealer.

billr
07-16-2007, 09:47 PM
385 plus tax. This was a new, not refurbished. The mastercraft dealer said that was a lot cheaper than his price.

Flatwaterfooter
07-24-2007, 02:56 PM
The part number I got from the dealer is MC part# 81685020. How can I cross refrence this with a Chevy part number?

billr
07-24-2007, 03:14 PM
Part # off the Chevy Dealer:12527739 Pump Kit 1.069*B Mine is a '96 Total including tax: 387.39

Flatwaterfooter
07-24-2007, 04:10 PM
Thanks agian for the quick reply Bill. I found this on line.

http://www.conquestauto.com/servlet/the-1192/Brand-New-GM-Water/Detail

billr
07-24-2007, 05:21 PM
Just make sure you take out the factory thermostat and use the mastercraft thermostat.

Flatwaterfooter
08-06-2007, 10:24 AM
Finally put the new water pump in. I ended up getting it through Napa for $150.00. Everything worked out well and the boat ran great. Does anyone know where I can have the old one rebuilt. I would like to have it as an extra or sell it if someone needs one.