|
10-19-2017, 06:51 PM
|
#1
|
Senior Member
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
|
Jabsco Raw Water Pump Improvements
The photos are of my spare raw water pump. My engine is a Perkins 6-354 Range 4. I have replaced all my slotted brass cover plate screws with SS allen screws, and made an allen driver with the correct length for my pump mounting position. I have also made an impeller removal tool that works well for my pump location.
__________________
Dave Thompson
American Tug 34-109
Home Port Anacortes Skyline & Sitka AK
|
|
|
10-19-2017, 07:01 PM
|
#2
|
Guru
City: Everett, WA
Vessel Model: Ocean Alexander 38'
Join Date: Oct 2007
Posts: 799
|
Dave, is there any issue with mixing metals?
|
|
|
10-19-2017, 07:08 PM
|
#3
|
Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,299
|
Very nice. Don't know why Jabsco doesn't use Allen screws.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
|
|
|
10-19-2017, 07:20 PM
|
#4
|
Guru
City: Beaverton, Ontario
Vessel Name: Looking Glass
Vessel Model: Carver 370 Voyager
Join Date: Nov 2012
Posts: 1,240
|
Good for you. I replaced mine with hex screws and use a nut driver. Saves a lot of time and frustration.
__________________
Allan
|
|
|
10-19-2017, 07:44 PM
|
#5
|
Senior Member
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
|
Quote:
Originally Posted by Max Simmons
Dave, is there any issue with mixing metals?
|
The original screws were brass, threaded into a bronze pump body, so I think stainless is actually an improvement.
I made a crude video for YouTube titled perkins marine engine raw water pump improvements.
__________________
Dave Thompson
American Tug 34-109
Home Port Anacortes Skyline & Sitka AK
|
|
|
10-19-2017, 09:30 PM
|
#6
|
Guru
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
|
Be worth using duralac, tefgel or similar on those dissimilar metal threads IMHO.
|
|
|
10-20-2017, 06:42 AM
|
#7
|
Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,541
|
Greetings,
Mr. HM. Kudos on the removal "tool". I like it!
__________________
RTF
|
|
|
10-20-2017, 07:17 AM
|
#8
|
Guru
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,869
|
Quote:
Originally Posted by HopCar
Very nice. Don't know why Jabsco doesn't use Allen screws.
|
You can always find a flat screwdriver. Not so an Allen wrench.
Slotted screws have not been an issue for me on my pump but I suppose if access was more difficult, Allen screws might make it easier to remove and replace the screws.
|
|
|
10-20-2017, 08:24 AM
|
#9
|
Guru
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,714
|
Quote:
Originally Posted by WesK
You can always find a flat screwdriver. Not so an Allen wrench.
Slotted screws have not been an issue for me on my pump but I suppose if access was more difficult, Allen screws might make it easier to remove and replace the screws.
|
Exactly. I also switched to SS Allen bolts. There just wasn't room to get a flat screwdriver in there, never mind a screwdriver and a hand to turn it. An Allen driver on a ratchet works great.
As it turned out, my impeller puller fit, just barely, so no tool mod was required. But I like the idea.
This changes an impeller swap job from a day-long affair involving turning my knuckles into hamburger, into a merely unpleasant job involving an uncomfortable position outboard of one engine.
|
|
|
10-20-2017, 08:37 AM
|
#10
|
Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,119
|
Also the knurled cap screws make it easy to start and snug by hand.
|
|
|
10-20-2017, 10:24 AM
|
#11
|
TF Site Team
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
|
Nice job. I like the removal tool also. Am I reading the Jabsco model number right 9990-1?
I need to get a back up pump for my old Obedorfer pump that's obsolete.
__________________
Marty
|
|
|
10-20-2017, 12:23 PM
|
#12
|
Senior Member
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
|
Quote:
Originally Posted by Pack Mule
Nice job. I like the removal tool also. Am I reading the Jabsco model number right 9990-1?
I need to get a back up pump for my old Obedorfer pump that's obsolete.
|
Jabsco 9990-41, sorry it didn't show up very well in the photo.
__________________
Dave Thompson
American Tug 34-109
Home Port Anacortes Skyline & Sitka AK
|
|
|
10-20-2017, 01:04 PM
|
#13
|
TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
|
Great job! I did the same to my Jabsco pumps years ago and it's been a great improvement. Another trick with the back plates is to reverse a worn one to get more life out of the one you have.
I also had one pump that was difficult to get primed after an impeller change. I called Jabsco and they explained that there is a replaceable wear plate on the back side of the impeller. A very fine pick was needed to grab an edge to remove it. Jabsco sent me a new one gratis and it solved the problem.
Here's my impeller removal tool...
|
|
|
10-20-2017, 02:05 PM
|
#14
|
TF Site Team
City: Paris,TN
Vessel Name: Slo-Poke
Vessel Model: Jorgensen custom 44
Join Date: Jan 2013
Posts: 3,749
|
Quote:
Originally Posted by Helen Marie
Jabsco 9990-41, sorry it didn't show up very well in the photo.
|
Thank You.Ouch that's a pricey one.
__________________
Marty
|
|
|
10-20-2017, 03:13 PM
|
#15
|
Guru
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
|
Quote:
Originally Posted by Pack Mule
Thank You.Ouch that's a pricey one.
|
Wish I could have one as cheap as that, only $500 here.
Try a 7420-1001, here they are more like $1200
|
|
|
10-21-2017, 02:48 AM
|
#16
|
Veteran Member
City: Seattle
Vessel Name: Dream Catcher
Vessel Model: Monk 36
Join Date: Jul 2015
Posts: 97
|
|
|
|
10-21-2017, 02:50 AM
|
#17
|
Veteran Member
City: Seattle
Vessel Name: Dream Catcher
Vessel Model: Monk 36
Join Date: Jul 2015
Posts: 97
|
And if you bump the starter with the cover off the impeller will start moving out of the case and is then easy to grab.
|
|
|
10-21-2017, 05:24 AM
|
#18
|
Guru
Join Date: Oct 2007
Posts: 22,553
|
The allen head screws can be removed or installed blind.
A huge advantage with some pump locations.
Very little torque is required (the stock slotted screws were brass) to have a watertight seal, so a std allen wrench is all thats needed.
|
|
|
01-11-2019, 03:15 PM
|
#19
|
Senior Member
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
|
Quote:
Originally Posted by Max Simmons
Dave, is there any issue with mixing metals?
|
Nope, not in my engine room. Everything is nice and dry. The photos are from my 34DeFever with the Perkins 6-354.
My new boat has a Sherwood raw water pump
__________________
Dave Thompson
American Tug 34-109
Home Port Anacortes Skyline & Sitka AK
|
|
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Trawler Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|