1976 Hatteras 58 LRC Stabilizer System Install

[Captain Ralph]

Another late thought; Is your main impeller & pump fresh?

 

[JD5652]

Another late thought; Is your main impeller & pump fresh?

Good thought Capt... I replaced the impeller in Oct 2021 and have about 100 hours on it. The pump casing "looked" good when I replaced the impeller. The cover was in "OK" shape... I guess it could be possible that RW pump is somewhat weak ... I do not know the age of the pump itself.

FYI... with the engine running, I removed the freshly installed cooling water line from the location just after the RW pump... water shot up about 2-3 feet in the air.... that was my redneck engineering check for how much head pressure it was producing...

 

[JD5652]

Here is a photo of the original water offtake on the starboard engine for the old Naiad 252 system that was originally installed in our 1984 boat.

The copper pipe goes about 1" into the cap fitting. It supplied the raw water just fine for the old Naiad and still does for the replacement Vetus system. Note, everything was level and there was minimal head. The hose travelled over the engine and along the wall at the same height to the Naiad 252 heat exchanger inlet.

If you do this, then you may not need the dedicated pump.

There is more at this link....

https://www.samsmarine.com/forums/s...Thickness-amp-New-Stabilisers-1984-61MY/page3

Congratulations on your new stabiliser system. It will make a huge difference.

View attachment 57191

Thanks Scott for the pic... what engines do you have? I'm assuming at least 871's or 892's with turbos and the high capacity water pump??...

 

[JD5652]

I do not like the idea of a brush/DCv motor trying to run near continuous duty pump vs lowering the head a bit to insure water flow when the engine (hydraulic pump) in in operation. IMO, not a real reliable set up with a brush motor.
If you have TA engines, it may be tight for another PTO point, TIs still have some options for another direct or belt drive pump.
Other options include the hydraulic pressure driving an other impeller pump as on some later Hatts.

Capt-

The engines are 671 naturals set up for 173 HP each. It does not appear that I have another PTO on this engine to drive another auxiliary pump.

I did post this up in trawler forum as well and many people responded that they have DC electrical auxiliary pumps supplying cooling water for stabilizer oil cooling. My guess is the setup is not super unusual.

Also, the AYB yard manager also stated they have installed this set up many times before. I do have an oil high temp alarm on the system.

 

[Captain Ralph]

Capt-

The engines are 671 naturals set up for 173 HP each. It does not appear that I have another PTO on this engine to drive another auxiliary pump.

I did post this up in trawler forum as well and many people responded that they have DC electrical auxiliary pumps supplying cooling water for stabilizer oil cooling. My guess is the setup is not super unusual.

Also, the AYB yard manager also stated they have installed this set up many times before. I do have an oil high temp alarm on the system.

Yes, I see the engine back in post #50.
Pulley on the for crank end or hydraulic driven water pump could still be options.

I'm not trying to be a gripe here. As these threads are for, to help. We all wish the best for everybody projects here.

The funny thing, I have one of those pumps in 32V, still new. Was shy to use it for a past cold plate project. But if everybody is having good results with a brushed DCv motor running continuously, I may reconsider that old project pump.

 

[tomrealest]

WOW, What an exciting and informative post. THANKS to everyone!