• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.
  • ALL iboats Forum Members and Guests:
    To show our appreciation for your participation in the Forums, we're offering an exclusive Forums-only discount good for an additional 5% off your iboats.com order for a limited time.
    To redeem, simply call our Customer Service Team at 800-914-1123 (Open M-F, 9am - 8pm Eastern Time) and mention the Forums 5% off discount. Offer excludes engines, trolling motors, and electronics.

Announcement

Announcement Module
Collapse
1 of 2 < >

Looking for Genuine Volvo Penta parts? Visit the volvopentastore.com - powered by iboats.com to receive FREE SHIPPING on orders over $99!

Looking for Genuine Volvo Penta parts? Visit volvopentastore.com - powered by iboats.com to receive FREE SHIPPING on orders over $99! UPS Ground only. Not available on Alaska, Hawaii, or international orders.
2 of 2 < >

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old threads or hijack existing threads. Old threads of a technical nature are like a library book, Please do not write in them.

2. Old threads should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís thread (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new thread of your own.

4. If you have a question for the original poster (OP) and the thread is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old thread.

5. By starting your own thread, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís thread. And those answers will be specific to your particular issue.

6. Please do not post to threads that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any thread that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old thread.

7. Posting at the end of any thread is considered to be hijacking the original posters thread which in turn subjects the thread to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive thread asking you not to reply to old threads. The Red banner will read: Please note this thread has been inactive for 90 days. For the best results, please start a new thread.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

Volvo Penta 5.0GL fuel system

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • Volvo Penta 5.0GL fuel system

    Hello,

    I have a Volvo Penta 5.0GL. It quit all of a sudden one day, ran a little the next and had to be towed back to slip. No fuel was getting to the carburator. I looked at a few previous posts regarding fuel pump relay.

    Terminal 30 is getting power, but when I jumpered 30 and 87, the pump did not work. Thinking it was the pump, I replaced it. It still does not work when 30 and 87 are jumped.

    Any help you can provide would be appreciated....thanks in advance.


  • #2
    Re: Volvo Penta 5.0GL fuel system

    I cant recall the terminal numbers, are those direct power to pump (outside side of relay)?
    If so then the pump is bad. Don S posted links to the factory manual here I think. If not let me know, I have OEM fuel system manual and can look with diagram for you.

    Comment



    • #3
      Re: Volvo Penta 5.0GL fuel system

      Thanks for the reply. I now have successfully got the pump working.

      The problem now is that the pump works, but it still doesn't pull and gas from the tank. The filter is new. I removed the gas line going into the filter/pump and blew into the line. It seems like the other end of the line is plugged since I couldn't get any air to move through it.

      Should I be able to blow air through it? I tried to take the fittings off the gas tank, but can't seem to move them at all. Any tricks? Am I on the right track?

      Thanks again.

      Comment



      • #4
        Re: Volvo Penta 5.0GL fuel system

        I removed the gas line going into the filter/pump and blew into the line. It seems like the other end of the line is plugged since I couldn't get any air to move through it.
        That is because of the antisiphon valve in the top of the gas tank fitting (Looks like a hose barb). It's a spring loaded check valve that prevents a siphon should a line break below the fuel level.
        You could have an air leak between the engine filter and the tank, or the pickup in the tank could be plugged. Or the pump could be bad.
        Get a remote fuel tank (outboard tank) and hook it up to the engine fuel filter fitting. Then prime the system and see if the engine will start and run. DO NOT pump the outboard primer bulb while the engine is running. The pump will overpressureize the carb if it's working correctly.
        Don S.

        sigpic

        Please, no PM's (Private Messages) regarding boat/engine problems.
        That is what the forums are for.
        Only forum/moderator issues will be answered in PM's.

        Comment



        • #5
          Re: Volvo Penta 5.0GL fuel system

          Check it for leaks , if there are no leaks then sounds like anti siphon valve is stuck shut. You can remove it altogether I believe, or clean it and re-install.

          Comment



          • #6
            Re: Volvo Penta 5.0GL fuel system

            Originally posted by mikeneal View Post
            Check it for leaks , if there are no leaks then sounds like anti siphon valve is stuck shut. You can remove it altogether I believe, or clean it and re-install.

            Sure, remove it altogether ......... It's like removing the safety from your hand gun, sure you can, but do you really want to ???????
            Don S.

            sigpic

            Please, no PM's (Private Messages) regarding boat/engine problems.
            That is what the forums are for.
            Only forum/moderator issues will be answered in PM's.

            Comment



            • #7
              Re: Volvo Penta 5.0GL fuel system

              IMO hand gun safety is slightly different then a anti siphon valve. When did they start to add anti siphon valves to boat tanks tanks? Not exactly same risk mitigation. I didn't tell him to use automotive ignition part.
              Originally posted by Don S View Post
              Sure, remove it altogether ......... It's like removing the safety from your hand gun, sure you can, but do you really want to ???????

              Comment



              • #8
                Re: Volvo Penta 5.0GL fuel system

                Originally posted by mikeneal View Post
                I didn't tell him to use automotive ignition part.
                but you may as well have

                the anti-siphon valve is a safety device, to prevent fuel from siphoning out of the tank due to a fuel line rupture possibly causing a major fuel spill

                they have been installed on boats for a long time, if no anti-siphon valve is in place, there should at least be a shut-off valve somewhere in line before the pump

                clean an anti siphon valve?? no, replace it if it doesn't work - they're cheap
                Sometimes when people try to save a penny, they end up spending a dollar

                It is best to fully understand how to properly operate, inspect, troubleshoot and repair your equipment

                Comment



                • #9
                  Re: Volvo Penta 5.0GL fuel system

                  One of the neat things about forums is the chance for people to post their opinions on any subject, and they don't even have to know anything about what they are talking about. The bad thing, the ones asking the questions, have no idea if the person answering a question is right or wrong. Kind of scary, isn't it.
                  Don S.

                  sigpic

                  Please, no PM's (Private Messages) regarding boat/engine problems.
                  That is what the forums are for.
                  Only forum/moderator issues will be answered in PM's.

                  Comment



                  • #10
                    Re: Volvo Penta 5.0GL fuel system

                    I should have be more clear in my response. I meant remove it and see if it solves issue. Not my intent to leave it out altogether for forever. I wouldn't use a auto starter (or ignition) even for a second to "troubleshoot" a problem but I would take the A-S valve out and test boat. I admit, I should have be clearer and it was a bad idea to suggest he break USCG rules, I honestly didn't realize the A-S was USCG reg. Guess that's why the personal attack about "not knowing what I am talking about". I was a auto tech for a while when younger then went back to school to get a mechanical engineering degree. I have built everything from 11 second street driven NA Volkswagens to automatic transmissions and designed stuff that lives is on the International Space Station, I am not a complete doof. (part doof maybe.... :-) ) I enjoy this site and have learned a ton about boating in my time here and I try to contribute back when I can. I assure you, was not my intent to spread mis information. Don, I suppose it is winter there? You seem to be grumpy (er) these days, or maybe I caught you on a bad day.

                    Comment



                    • #11
                      Re: Volvo Penta 5.0GL fuel system

                      Thanks for everyone's help. I replaced the anti siphon valve and now it works fine. I had no idea there was such a valve....

                      Thanks again,
                      Barry

                      Comment

                      Working...
                      X