Electric fuel pump on PSC 31 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Boat Builders Row > Pacific Seacraft
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 01-05-2011
Member
 
Join Date: Aug 2010
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
AlLorman is on a distinguished road
Electric fuel pump on PSC 31

The electric fuel pump used to bleed the engine on my newly acquired PSC 31 was dead, but a new one came with the boat. My son and I installed it yesterday but it doesn't seem to be functioning properly. I cracked the bleed screw on the on-engine fuel filter and when we turned the pump on, there was a splash of fuel emitted, but thereafter nothing. We ran the pump for what seemed like a reasonable time and no further fuel emerged. Is the pump not self-priming? If not, how does one prime it? Can anyone who has done this job offer guidance?

Many thanks.

Al
s/v Ann West, PSC31 No. 55
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 01-05-2011
Senior Member
 
Join Date: Jan 2008
Posts: 409
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 7
noelex77 is on a distinguished road
Electric fuel pumps don’t seem good at self priming. I used the vacuum oil extraction pump on mine to get it to prime. Once they are primed they seem to run fine with a reasonable lift height.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 01-05-2011
orientalnc2010's Avatar
Senior Member
 
Join Date: Oct 2007
Location: oriental NC
Posts: 145
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
orientalnc2010 is on a distinguished road
Hi Al,
You must have a different set up than what I have. What engine do you have? My 3ym30 is not designed to run the electric fuel pump unless key is turned to start. There is a manual priming pump on the starb side of the engine that is used to bleed the system. My racor filter also has a manual pump for priming the filter. This is how I have been bleeding my system after filter replacement.
A previous boat I had was equipped with a westerbeke and the electric fuel pump was activated when the key was turned to on, it was kinda nice because the system was self bleeding. Not so with the yanmar.
__________________
Regards,
Steve
PSC 31 #125
Ryoko
Oriental, NC
One of the two happiest days in a sailors life
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 01-05-2011
RainDog's Avatar
Not Finished Yet
 
Join Date: Jun 2009
Location: Kemah, TX
Posts: 612
Thanks: 20
Thanked 28 Times in 25 Posts
Rep Power: 6
RainDog is on a distinguished road
Sounds like I have the same setup as Steve: Racor, then electric fuel pump, then manual pump on the engine itself, then fuel filter. When I turn the key, the pump kicks in. I can use it to bleed the system. I cannot tell any difference between using the manual or electric pump to bleed the system (except electric makes a mess). On a recent trip my Engine stopped running. I was in big waves so thought it was a clogged filter. After changing both filters, still no love. I realized it was a bad electric fuel pump. I replaced it with a new (much bigger, hope that is OK!) one.

What is the purpose of this pump? I thought it was required, but I noticed many other installs do not have a similar pump.
__________________
Pacific Seacraft 34 #142
Kemah, Texas

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 01-05-2011
Member
 
Join Date: Aug 2010
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
AlLorman is on a distinguished road
My 3GM30F fuel supply is set up like this: fuel tank to an electric fuel pump, then a Racor turbine filter, then the on-engine mechanical fuel pump, then the on-engine fuel filter. The electric fuel pump seems intended solely for bleeding the engine. It is switched (the switch is right next to the pump) to a three-way switch with the engine compartment blower. Either requires that the engine key be engaged, but the switch only lets you select either the blower, the electric fuel pump, or off. When the system is properly bled and the engine is running, the electric pump is off and the mechanical pump supplies the engine with fuel (although I guess one could use the electric pump in an emergency if the mechanical pump dies).


Having spent hours bleeding prior Yanmar engines with the ridiculous little mechanical pump lever, I liked this set, at least until I found that I couldn't prime it. I'm going to try noelex77's suggestion to use an oil extractor to prime the electric pump, but I'm open to other suggestions.

Al
s/v Ann West PSC 31 No. 55
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 01-06-2011
Senior Member
 
Join Date: Feb 2007
Posts: 176
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
stevemac00 is on a distinguished road
If the pickup tube is not clogged it must be the pump since you just replaced it. Mine easily self-primes. Last year I replaced the fuel tank, reconnected the empty lines and started the engine.
__________________
Steve
PSC 31 #84
Talisman
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 01-06-2011
Senior Member
 
Join Date: Oct 2006
Location: Virginia
Posts: 724
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
badsanta is on a distinguished road
the electric fuel pump can be used to prime up to the engine. It will NOT push fuel through the high pressure pump to the injectors. You must crank the 3gm30 to get fuel to the injectors. crack the nut at each injector to release air then tighten. I know this is not what you asked for about the electric fuel pump working, but it is a common misconception. I use the raycor 500 and racor states that fuel filter should have the electric pump between the filter and the engine. as you should pull the fuel and put the filter under a vacuum and not pressurize it by pumping the fuel pump into the filter. Your filter may be different,
__________________
That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 01-06-2011
Member
 
Join Date: Aug 2010
Posts: 98
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 5
AlLorman is on a distinguished road
I have found the fuel hose diagram from my meager owner's manual and it shows the pump in its present position: before the Racor turbine filter. I know that you sometimes need to crack the injector bleed screws, but so far I haven't been able to get fuel to the engine filter. I'm going to try today with the manual pump.

Al
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 01-06-2011
Podjo's Avatar
Member
 
Join Date: Jan 2010
Location: New Bern North Carolina
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Podjo is on a distinguished road
If it is a Walbro fuel pump, then it should be self priming. The Walbro is rated to run dry for at least one hour. You may want to check that there is no restrictions in fuel prior to the pump. I have recently read where Nigel Caulder has this same issue, and forgot to check if there was a blockage at the bottom of the fuel pick line in his tank. He checked that by blowing into the line and listening for bubbles. I supposed if you have ever blown bubbles in your milk as a kid, you get the idea. The Walbro has an input side and an output side. If it is not marked, then you should be able to do another blow test, as it only works one way,and not the other. Good luck. Let us know what fixes it?
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 01-13-2011
Junior Member
 
Join Date: Feb 2001
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
wiley586 is on a distinguished road
Al - On my 31 (#44) the diagram in the owner's book shows the pump before the Racor, but this is not correct. The actual flow is from the tank to the Racor, then the line doubles back to the pump. I've always heard that this is the proper arrangement. You may want to double check the layout. I mention this because the symptoms you describe would occur if you had a vacuum leak between the tank and the pump. The most likely spot would be at the Racor. Even without a leak, you could also see this with some air in the Racor. I always found it good to manually fill the Racor to the brim.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which electric fuel pump to add in series on a M5411 crofrog Diesel 13 10-16-2009 12:05 PM
what does an electric fuel pump on a 2QM15 Do? 30Irwin Diesel 4 10-01-2009 01:36 AM
Installing electric fuel pump okapi3 Gear & Maintenance 9 03-31-2008 12:52 PM
electric fuel pump Philip Littman Pacific Seacraft 4 01-20-2007 01:28 PM
Manual to Electric Fuel Pump flintda Gear & Maintenance 2 02-20-2006 01:39 PM


All times are GMT -4. The time now is 07:22 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.