Electric and mechanical fuel pumps
+ Reply to Thread
Results 1 to 8 of 8

Thread:
Electric and mechanical fuel pumps

  1. #1

    Join Date
    Dec 2007
    Posts
    347

    Default Electric and mechanical fuel pumps

    Last year running the original package in the 21 Hallett, after it'd sat for the week I'd have to crank it over for a fairly long time before it got fuel to fire. Bad on the engine, bad on the starter. Bad on me with the MILF's looks.

    Can I mount an electrical pump after the tank selector to use as a "lift" pump and help get fuel to the mechanical pump on the block? Would I need to regulate the pressure to the mechanical pump?

    Thanks in advance.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Dec 2007
    Location
    Fresyes
    Posts
    1,705

    Default

    Buddies boat has same exact problem you have. Kind of annoying waiting for the mech- pump to get gas to the carb to start.
    I'll let the experts tell you the best way to add the electric pump, but we found a great work around on his boat. And it's free!!
    We put an air chuck on the compressor, then jam the chuck (rubber tip) into the vent outlet from the gas tank. Blip the air chuck a couple of times and it (the air pressure ) forces gas from the tank all the way to the carb. Then it fires on the first crank. very slick.
    If you don't have a vent fitting, Just open the fuel fill, stick the air chuck in and seal the top w/ your hand or a towel. Works the same. We've done it on a few boats.
    Hope it helps.
    Is it just me or are toilet seats getting smaller?

  4. #3

    Join Date
    Dec 2007
    Posts
    347

    Default

    Thanks, righty, that is TRULY Fresneck! Just kiddin... That'd be the way to do it, but I found it an issue on a overnight basis while up at Trinity this last Summer and lumping a compressor seems a bit much.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Distinguished Member David 519's Avatar
    Join Date
    Jan 2008
    Location
    NorCal
    Posts
    5,754

    Default

    Our ski boat does the same thing first time out each season. Before I go, I start the boat hooked up to a water hose in the driveway. I pull the air cleaner and prime the carb with a squirt of gas like you would a blown/injected deal. It usually starts immediately, then die after a few seconds. Do it one more time and it's usually enough to fill the carb and keep running on it's own. Quick and easy. Don't pour to much down the carb, you don't want to wash the cylinders down. Also, don't squirt it while your cranking the engine in case it back fires. Done properly, works everytime.

  7. #5
    Senior Member HighVoltage329's Avatar
    Join Date
    Dec 2007
    Location
    San Jose, Ca.
    Posts
    1,293

    Default

    Quote Originally Posted by Hallettbutt View Post
    Thanks, righty, that is TRULY Fresneck! Just kiddin... That'd be the way to do it, but I found it an issue on a overnight basis while up at Trinity this last Summer and lumping a compressor seems a bit much.
    Sounds like your carbs aren't holding gas in the bowls. It could be leaking into the motor. Check (replace) your metering block gaskets. Gas shouldn't evaporate overnight.

  8. #6
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

    Default

    IMO a little cranking after the boat has set a little while
    might do it some good, it will prime the oil system before it fires up.
    (as long as you don't crank for long periods of time).
    if this is something you have to do after it sits overnight,
    you have problems like HighVoltage329 suggested

  9. #7

    Join Date
    Dec 2007
    Posts
    347

    Default

    Thanks. Yeah, after more than a night, it was seeming to take more than I fingered it should to get fuel up to the bowl(s). That was on the POS Olds that was in it. With the new motor and the carb taken care of, I'm trying to keep the cranking down to a minimum.

    The idea that cranking it will develop oil pressure is sound. Building any pressure soon enough with the simple minute of cranking though, I wonder the worth of it.

  10. #8
    Senior Member Brendellajet's Avatar
    Join Date
    Dec 2007
    Location
    Ladera Ranch
    Posts
    2,135

    Default

    Pull the sight plug & filler up.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95