Thread Tools Search this Thread Display Modes
Old 05-26-2018, 07:56 AM   #21
City: Seaford Va on Poquoson River, VA
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,264
I started on my refurbishment of this 3/4 HP pool pump. Pump is a Dynamo, DYN 11-N1-3/4
Amazon still lists this, and mine is old. I see more powerful dynamo Pentair pumps for less on amazon.

Disassembled the whole thing, cleaned it all and painted the end bells.
Bearings are in good shape.
The air exposed pump shaft was rusty. I primed, painted, then greased and heat shrunk a rubber tube over that, so it will not be rusting again.

The armature, I disassembled the centrifugal switch, cleaned and put a coat of primer on exposed parts. If a motor sits a long time, it can rust armature to stator, and do not want that to happen on the boat.

I should have the pump together today and next week working on the boat.

I have cleaned up the motor housing and the bolt down foot I will coat with some PL to prevent rust, on top of the grey primer. Pump motor was black, I am painting it buff.

When kids were young, we had an above ground pool. I kept the pump and sand filter. Then my friend gave me his pump for his above ground pool, so I now have 2, but his needs a new impeller, which is maybe $25 I don't have to spend..
Impeller for the pump I am using in the boat is # 35-4552

For my purpose 3/4 HP, motors draws 9 amps, is plenty. Other pump is 1HP.
Attached Thumbnails
sdowney717 is offline   Reply With Quote
Old 06-07-2018, 08:27 PM   #22
City: Seaford Va on Poquoson River, VA
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,264
I have the pump in and it works ok, better than the original pump.
I went with the 1 HP pool pump as it is able to shoot water out farther from the hose nozzle than the 3/4 hp pump. the 1 HP pump is 2 inches longer than the 3/4 HP pump.

I have a simple on-off switch, so one side of the outlet is switched, other is on all the time. To prevent deadheading the pump (which does not bother it that I could tell), I tapped into the reducer bushing and ran a 3/8 hose that dumps water to the outside of the hull by way of a small through hull made of a 3/8 copper tube glued into the hull. That will also tell people the pump is on, being so quiet and did not want it left running dead headed for a long time.

I included a check valve in the pump outlet. This prevents water from draining out of the hoses.

I used teflon pipe dope and teflon tape on the joints, and they are dry, no leaks.

I never could make the well pressure switch work, it seems these pumps do not put out enough PSI, and no switch I found had a low enough PSI, which is ok, because stopping and starting them takes a big surge of current. So when the switch is on, the pump is always on.

Pump is very quiet.
Attached Thumbnails
20180607_150722.jpg   20180607_150738.jpg  
sdowney717 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program

All times are GMT -5. The time now is 03:56 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012