Need help fuel line

Discussion in 'Boating & Boat Maintenance' started by BassHound, Jun 21, 2020.

  1. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    Mercury 30hp efi.
    Bought this boat late 2019. Have had it out about a dozen times with no issues until recently.
    Shortly after boat gets on plane the motor will stall.
    I did spot a leak at the gas tank connector and replaced it, but still same results.
    Replaced the primer bulb but still same results.
    I have a filter on order and will replace when it arrives.
    But I have been viewing YouTube vids and disconnected the fuel just before the carb and started the motor to see how much fuel is pumping. The fuel does pump but in small spirts.
    Is this normal? Or should there be a steady flow?
    I can pump fuel to the motor via primer bulb. No issues starting the motor as it fires up right away.
    Any advise is appreciated
     
  2. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    Pulsing is normal, not a steady flow. Is it a portable tank? Make sure the vent is open.

    Replaced the bulb- is it the correct direction? There Is a check valve in there

    On the Efi, there is no carb, I am assuming the throttle body. Only experience with efi is Suzuki and there is a float bowl that gives you issues. Don’t know if mercury has similar

    put a zip tie in the end of the fuel line connection to hold the ball open and hand pump the fuel into a mason jar or clear container. Let the fuel settle and see if you have water in the fuel

    Is this tiller or hard wired/plumed? Is there an efi/check engine light? Possible shut down

    I have seen the intake in the cowling get clogged from wasp nests etc if it has been sitting. You can try running with the cowling off to see if problem duplicates.

    is the problem intermittent or constant?
     
  3. toolbox

    SDFish VIP

    Joined:
    May 23, 2010
    Messages:
    2,263
    Trophy Points:
    315
    Ratings:
    +2,801
    If the bulb stays firm it’s not in the lines.
     
    • Like Like x 1
    • Agree Agree x 1
    • List
  4. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    Yes portable tank and vent is open.
    Bulb is in correct direction.
    Waiting for part to replace filter.
    The rest of your input is foreign to me and will need to look into this further. Much appreciation for the advise.
     
  5. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    The bulb went flat before I changed it out.
    But over a short period of time it did re-inflat.
     
  6. toolbox

    SDFish VIP

    Joined:
    May 23, 2010
    Messages:
    2,263
    Trophy Points:
    315
    Ratings:
    +2,801
     
  7. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    so true. at el cap i would need to do this 3 or 4 times from canjos to the ramp.
     
  8. toolbox

    SDFish VIP

    Joined:
    May 23, 2010
    Messages:
    2,263
    Trophy Points:
    315
    Ratings:
    +2,801
    Pump the crap out of the bulb then put some soap bubbles on each fitting between the tank and the engine and look for leaks.
     
  9. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    Check your portable tank pickup tube inside the tank
     
  10. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    Also a flat bulb can be caused by a restriction between the bulb and pick up tube OR a faulty gas tank vent
     
  11. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    How old is your fuel and did you completely empty the portable tank? Water in the fuel either moisture or sitting with vent open can definitely cause a similar issue.
    When you store your tank best to keep it topped off, mixed and with a stabilizer. Any space in tank can give problems to moisture. Also make sure vents are closed and out of the weather.

    it’s also possible to get water from gas stations.
    I come from a line of mechanics and have grown up being told only standard oil, (shell,chevron and Texaco) .
    super unleaded For the outboard too. Don’t do Arco or any off brand station
     
  12. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    All this is great info.
    I did leave the vent open after a session for a few days.
    After the filter change I will top off with good fuel and give her a go and report back.
    Thanks everyone.
     
  13. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    I would empty old fuel and start with fresh. You can always pour it into your car. It won’t hurt
     
    • Like Like x 1
    • Agree Agree x 1
    • List
  14. BassHound

    SDFish VIP

    Joined:
    Mar 5, 2008
    Messages:
    691
    Trophy Points:
    115
    Ratings:
    +240
    Good idea. I think I’ll try that
     
  15. sherpa

    SDFish VIP

    Joined:
    Mar 15, 2010
    Messages:
    994
    Trophy Points:
    185
    Ratings:
    +1,336
    I had a 2000 F150 I bought new and had 190000 miles on it and 90% of the time I used Arco gas, with no problems with it
     
  16. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    I’ve had issues with arco especially diesel. Mainly fuel mileage. They put additives that displace fuel. That’s why it’s cheaper. To each their own. It all comes from the same place but additives and refineries make the difference. I personally wouldn’t run arco regardless if there weren’t issues. You can tell the difference with detonation in a single cylinder two stroke.
     
  17. fisheromen

    SDFish VIP

    Joined:
    Mar 16, 2008
    Messages:
    14,210
    Trophy Points:
    330
    Location:
    Ramona
    Ratings:
    +22,399
    Boat:
    1986 Glastron
    BassHound , you need a new power pack! Mine did that for years. Finally got a mechanic to diagnose the problem. I would take off across the bay and then it would drop off of plane, sputter and die. I would sit there a few minutes, start it up and be good for the day. Very frustrating! Yep power packs! Mine has two.
     
  18. sherpa

    SDFish VIP

    Joined:
    Mar 15, 2010
    Messages:
    994
    Trophy Points:
    185
    Ratings:
    +1,336
    My 200 Mercury was doing that started at the least expensive and worked up to the brain, had it rebuilt, solved the problem. Hopefully they still make one for your motor, or can find one used
     
  19. fisheromen

    SDFish VIP

    Joined:
    Mar 16, 2008
    Messages:
    14,210
    Trophy Points:
    330
    Location:
    Ramona
    Ratings:
    +22,399
    Boat:
    1986 Glastron
    Not sure if that is the same. These are little black boxes that sit on each side of the engine. They are pricey!
     
  20. camobass

    SDFish VIP

    Joined:
    Nov 28, 2016
    Messages:
    1,213
    Trophy Points:
    165
    Location:
    Alpine
    Ratings:
    +2,877
    Boat:
    It floats
    It definitely could be a stator heating up and grounding too or power pack. CDI electronics has a trouble shooting manual pdf for nearly every make and model and supplies almost all aftermarket electrical related components
     
Loading...
Similar Threads - Need help fuel Forum Date
New to fly fishing: need some help Fly Fishing Jul 5, 2020
Need my faith restored in braided line.. Please help! General Fishing Jun 28, 2020
Need Help w San Diego Bay Fishing Jan 28, 2020
Need help bait fishing Bay Fishing Jan 4, 2020
Fish ID help needed Bay Fishing Dec 11, 2019

Share This Page