Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-19-2017, 06:51 PM   #1
Senior Member
 
Salish Nomad's Avatar
 
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.
Attached Thumbnails
DSCN1072.jpg   DSCN1073.jpg   DSCN1074.jpg   DSCN1075.jpg   DSCN1076.jpg  

DSCN1077.jpg  
__________________
Dave Thompson
American Tug 34-109
Home Port Anacortes Skyline & Sitka AK
Salish Nomad is offline   Reply With Quote
Old 10-19-2017, 07:01 PM   #2
Guru
 
Max Simmons's Avatar
 
City: Everett, WA
Vessel Model: Ocean Alexander 38'
Join Date: Oct 2007
Posts: 799
Dave, is there any issue with mixing metals?
Max Simmons is offline   Reply With Quote
Old 10-19-2017, 07:08 PM   #3
Guru
 
HopCar's Avatar
 
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
HopCar is offline   Reply With Quote
Old 10-19-2017, 07:20 PM   #4
Guru
 
LaBomba's Avatar
 
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
LaBomba is offline   Reply With Quote
Old 10-19-2017, 07:44 PM   #5
Senior Member
 
Salish Nomad's Avatar
 
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
Quote:
Originally Posted by Max Simmons View Post
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
Salish Nomad is offline   Reply With Quote
Old 10-19-2017, 09:30 PM   #6
Guru
 
Simi 60's Avatar
 
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.
Simi 60 is offline   Reply With Quote
Old 10-20-2017, 06:42 AM   #7
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Join Date: Oct 2007
Posts: 16,541
Greetings,
Mr. HM. Kudos on the removal "tool". I like it!
__________________
RTF
RT Firefly is online now   Reply With Quote
Old 10-20-2017, 07:17 AM   #8
Guru
 
rwidman's Avatar
 
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,869
Quote:
Originally Posted by HopCar View Post
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.
rwidman is offline   Reply With Quote
Old 10-20-2017, 08:24 AM   #9
Guru
 
CaptTom's Avatar
 
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,714
Quote:
Originally Posted by WesK View Post
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.
CaptTom is offline   Reply With Quote
Old 10-20-2017, 08:37 AM   #10
Guru
 
psneeld's Avatar
 
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.
psneeld is offline   Reply With Quote
Old 10-20-2017, 10:24 AM   #11
TF Site Team
 
Pack Mule's Avatar
 
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
Pack Mule is offline   Reply With Quote
Old 10-20-2017, 12:23 PM   #12
Senior Member
 
Salish Nomad's Avatar
 
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
Quote:
Originally Posted by Pack Mule View Post
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
Salish Nomad is offline   Reply With Quote
Old 10-20-2017, 01:04 PM   #13
TF Site Team
 
FlyWright's Avatar
 
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...

__________________
My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al FJB

@DeltaBridges - 25 Delta Bridges in 25 Days
FlyWright is offline   Reply With Quote
Old 10-20-2017, 02:05 PM   #14
TF Site Team
 
Pack Mule's Avatar
 
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 View Post
Jabsco 9990-41, sorry it didn't show up very well in the photo.
Thank You.Ouch that's a pricey one.
__________________
Marty
Pack Mule is offline   Reply With Quote
Old 10-20-2017, 03:13 PM   #15
Guru
 
Simi 60's Avatar
 
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
Quote:
Originally Posted by Pack Mule View Post
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
Simi 60 is offline   Reply With Quote
Old 10-21-2017, 02:48 AM   #16
Veteran Member
 
DC36Monk's Avatar
 
City: Seattle
Vessel Name: Dream Catcher
Vessel Model: Monk 36
Join Date: Jul 2015
Posts: 97
Speedseal - http://www.speedseal.com/SpeedsealLi...howitworks.htm
DC36Monk is offline   Reply With Quote
Old 10-21-2017, 02:50 AM   #17
Veteran Member
 
DC36Monk's Avatar
 
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.
DC36Monk is offline   Reply With Quote
Old 10-21-2017, 05:24 AM   #18
FF
Guru
 
FF's Avatar
 
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.
FF is offline   Reply With Quote
Old 01-11-2019, 03:15 PM   #19
Senior Member
 
Salish Nomad's Avatar
 
City: Anacortes
Vessel Name: Salish Nomad
Vessel Model: American Tug 34
Join Date: Jan 2017
Posts: 317
Quote:
Originally Posted by Max Simmons View Post
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
Salish Nomad is offline   Reply With Quote
Reply

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 06:50 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012