Thread: Sealing pump/nozzle surfaces
09-10-2007, 09:27 AM #1
Sealing pump/nozzle surfaces
When sealing the wear ring / to transom and pump to nozzle the manual refers to Gasket Maker is this what they mean ? I know I have read where some use Yamabond.
If Yamabond which number ?
Last edited by mrbtd; 09-10-2007 at 09:30 AM.
09-10-2007, 01:11 PM #2
Yamabond 4 or a high quality marine silcone. Pump to transom seal I would use the Yamabond 4.
09-10-2007, 01:24 PM #3
i use 5200, sticks like chit to a blanket
takes a while to re prep if removed but i know its sealed good, i blew out some older marine silicone and wont re use ever again...
09-10-2007, 03:48 PM #4
I use Yamabond 4.Its made to hold 'pressure'.Its critical to seal the pump seams correctly.Losing pump pressure,(behind the prop),can yeild lesser performance.
09-10-2007, 04:19 PM #5
How much performance is lost?? I have never sealed pump surfaces with anything ... I take it apart too often to want to bother with the mess. But if it is worth 1 mph or more, then I might ...
09-10-2007, 04:53 PM #6
09-10-2007, 05:16 PM #7
Not sealing the pump correctly before the impeller will result in burn marks on your pump liner. It will delaminate due to the air being sucked in. I chased this problem for a while before figuring it out, ultimately going through several new/used liners. It may be a pain to seal it every time, but it's the right way to do it.
Use Yamabond. It's way easier to remove with a wire wheel on a drill than 5200, IMO.
09-10-2007, 05:25 PM #8
- Join Date
- Jul 2006
- Sacramento, California, United States
good, to know.
09-10-2007, 05:26 PM #9
09-10-2007, 05:26 PM #10
That makes sense, avoids cavitation and burning the liner. On the RXP we have a rubber gasket that seals that quite well. I was thinking more of the seal from the pump to the venturi/thrust nozzle ... and how valuable is it to seal those two sections?
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