Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Fuel System

Reply
 
Thread Tools Display Modes
  #1   IP: 192.186.122.174
Old 11-22-2017, 08:56 AM
GregH's Avatar
GregH GregH is offline
Senior Member
 
Join Date: Jun 2015
Location: Kingston, ON
Posts: 183
Thanks: 73
Thanked 5 Times in 4 Posts
Mechanical Fuel Pump

I've read on posts and searches about how to tell when fuel pump is leaking or not pushing/pulling its weight , ... otherwise, do people use a time frame or some other criteria besides failure for a general replacement kit job?

On the engine I have, the pump works fine, but I have no idea the age of gaskets, etc. Is it a case of "what works don't fix" or replace for peace of mind?
Reply With Quote
  #2   IP: 71.178.88.90
Old 11-25-2017, 08:32 PM
sastanley's Avatar
sastanley sastanley is offline
Afourian MVP
 
Join Date: Sep 2008
Location: Solomons, MD
Posts: 6,309
Thanks: 388
Thanked 240 Times in 185 Posts
Since I had no idea, I rebuilt mine over the winter a couple seasons after I got the boat...but it was low on the priority list.

The way you tell is that if the diaphragm is compromised, it leaks fuel into the crankcase, so if your oil smells like fuel, it might be a failing pump. This is by design so fuel doesn't otherwise get into the bilge and become an explosion hazard.

The way I'd tell if it is pulling its weight is to put a $15 pressure gauge in line, just before the carb.
__________________
-Shawn
"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold.
Great fall sailing!!

http://www.moyermarine.com/forums/signaturepics/sigpic3231_6.gif
Reply With Quote
The Following User Says Thank You to sastanley For This Useful Post:
Dave Neptune (11-25-2017)
  #3   IP: 98.209.31.214
Old 11-26-2017, 07:22 PM
marthur's Avatar
marthur marthur is offline
Afourian MVP
 
Join Date: Dec 2004
Location: Grand Rapids, Michigan
Posts: 818
Thanks: 24
Thanked 19 Times in 18 Posts
I would also watch out for small black specs showing up downstream in the fuel / carb. On my boat that was the fuel pump diaphram beginning to slowly disintegrate.
__________________
Mike
Reply With Quote
The Following User Says Thank You to marthur For This Useful Post:
sastanley (11-26-2017)
  #4   IP: 32.211.28.40
Old 11-30-2017, 07:39 PM
Al Schober's Avatar
Al Schober Al Schober is offline
Afourian MVP
 
Join Date: Jul 2009
Location: Uncasville, CT
Posts: 1,233
Thanks: 4
Thanked 110 Times in 99 Posts
I'll throw in another voice for the pressure gauge at the carb inlet. If it indicates pressure, you have fuel. If not, continue diagnostics elsewhere.
Reply With Quote
  #5   IP: 192.186.122.174
Old 12-01-2017, 08:50 AM
GregH's Avatar
GregH GregH is offline
Senior Member
 
Join Date: Jun 2015
Location: Kingston, ON
Posts: 183
Thanks: 73
Thanked 5 Times in 4 Posts
In hindsight it was kind of a silly question, I have all the pressure gauge/polishing filter parts ready to go for the spring. And if the diaphragm isn't working, the gauge will tell me .. D'oh!

Thanks for the reminder !
Reply With Quote
  #6   IP: 70.24.12.74
Old 12-01-2017, 09:45 PM
gregsails's Avatar
gregsails gregsails is offline
Senior Member
 
Join Date: Sep 2013
Location: Sarnia, Ontario
Posts: 79
Thanks: 2
Thanked 1 Time in 1 Post
It is so simple to rebuild, I don't know why you wouldn't just do it. Better now, than on a sunny afternoon when your enjoying yourself
Reply With Quote
  #7   IP: 66.102.86.61
Old 12-02-2017, 05:05 PM
GregH's Avatar
GregH GregH is offline
Senior Member
 
Join Date: Jun 2015
Location: Kingston, ON
Posts: 183
Thanks: 73
Thanked 5 Times in 4 Posts
It's been added to my list for spring and my ever growing Moyer order list.
Reply With Quote
  #8   IP: 12.155.149.218
Old 12-05-2017, 06:04 PM
HOTFLASH HOTFLASH is offline
Senior Member
 
Join Date: Oct 2004
Location: Chicago
Posts: 197
Thanks: 23
Thanked 19 Times in 14 Posts
Fuel pump rebuild

Even I (am no mechanic) could successfully do the rebuild. The instructions were great.

Mary
Reply With Quote
The Following 2 Users Say Thank You to HOTFLASH For This Useful Post:
GregH (12-05-2017), sastanley (12-05-2017)
Reply

Thread Tools
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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Polishing Filter GregH Fuel System 25 11-17-2017 12:19 PM
helping a Tartan 27 owner with an A4 Fishguy Troubleshooting 60 08-11-2017 11:51 PM
Help!...Mechanical Fuel pump only pumps by hand... rshearley Fuel System 10 05-22-2016 04:54 PM
Mechanical fuel pump rebuild services Don Moyer Fuel System 40 01-14-2013 11:17 AM
mechanical fuel pump fitting stripped skhorleb Fuel System 1 01-27-2007 12:41 PM


All times are GMT -5. The time now is 04:04 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2017 Moyer Marine Inc.

All Rights Reserved