Do all 496's have water pressure sensors ?
07-10-2016, 02:23 PM
#31
Gold Member
Gold Member
the drop in repair kit for the original housings are a bandaid anyways. Many people forget that the sides of the housing wear and scars as well.. Impeller housings and impellers are matched to certain tolerances to pump the correct water flow volume and maintain pressure thru all rpms. These tolerances are matched front and back along with the complete side walls of the impeller housing.
Also boat owners who do not winterized properly and or do not drain the impeller housing 100 % of water risk a change of distorting the impeller housing in freezing temps.
Also boat owners who do not winterized properly and or do not drain the impeller housing 100 % of water risk a change of distorting the impeller housing in freezing temps.
Last edited by Keith Atlanta; 07-10-2016 at 02:26 PM.
07-10-2016, 07:52 PM
#32
Registered
I just installed a mechanical wp gauge. It reads 29psi at 3500rpm.
07-10-2016, 09:26 PM
#33
Banned
iTrader: (9)
I hear you but some boats have no sea strainers and wear / scar the blade area sides of the impeller housing internally. So the drop in S S plates front and back are not repairing the side wear / scars of the housing. That was mainly my point. and I agree the drop in repair S S plates can work 100 % for impeller housings but not all of them.
I have seen housings that look like a die grinder was ran internally on the sides. GEN VII, Jabsco, Johnson impeller housings to name a few
I have seen housings that look like a die grinder was ran internally on the sides. GEN VII, Jabsco, Johnson impeller housings to name a few
Last edited by BUP; 07-10-2016 at 09:29 PM.
07-10-2016, 09:33 PM
#34
Banned
iTrader: (9)
the hardin housing replaces the front section of the Gen VII pump. The back section is still Mercs. Hardin uses a Stainless steel backing plate that goes inbetween the hardin housing and the Merc back section. The WP still mounts in the original merc back section that is still used, when replacing with Hardin S S housing (kit).
Last edited by BUP; 07-10-2016 at 09:36 PM.
07-10-2016, 11:41 PM
#35
Gold Member
Gold Member
the hardin housing replaces the front section of the Gen VII pump. The back section is still Mercs. Hardin uses a Stainless steel backing plate that goes inbetween the hardin housing and the Merc back section. The WP still mounts in the original merc back section that is still used, when replacing with Hardin S S housing (kit).
07-11-2016, 07:48 AM
#36
I just put a new impeller and plate kit in last week to try to solve the problem. I smear dish soap on the inside of the housing when installing the impeller, and didn't notice any scoring on the housing.
I guess I could swap water pumps between motors to find out if its the pump before I have the boat hauled to check the external stuff.
The only other thing I can think of is that I had the drives off this winter for paint. I had a hard time (by myself) getting the drives back on. I wonder if the square oring could have moved on the install, and it could be sucking air while on plane ?? I should be able to prove or disprove that by looking at the PSI of the pump while increasing the RPMS in neutral to see if it goes past 5.8
I guess I could swap water pumps between motors to find out if its the pump before I have the boat hauled to check the external stuff.
The only other thing I can think of is that I had the drives off this winter for paint. I had a hard time (by myself) getting the drives back on. I wonder if the square oring could have moved on the install, and it could be sucking air while on plane ?? I should be able to prove or disprove that by looking at the PSI of the pump while increasing the RPMS in neutral to see if it goes past 5.8
07-11-2016, 07:55 AM
#37
Registered
The Hardin replacemnet impeller kit comes with a stainless front and rear wear plates. The pump housing itself is stainless which is much harder for wear. It is a nice design. It does use the stock rear plate housing which the hoses are connected to. The impeller does not touch the rear plate using the wear plates.
