Gas tank vent whistles

Discussion in 'General Discussion' started by The NY Dad, Sep 23, 2018.

  1. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    When we fill the tank on our 185 sport. It always splashes back out of the filler. I am considering a vent line whistle. I found 2 Green Marine Fuel Whistle, and Whisalert. From what i have read the Fuel Whistle works well but the whistle is annoyingly loud and piercing. I cant find much on the Whisalert, the one review I did find said it restricted the vent line so badly they could hardly fill the tank and they removed it. Anyone familiar with these whistles. Is the Whisalert loud and annoying also? Thanks
     
  2. CNYBoater

    CNYBoater Member

    129
    Aug 14, 2017
    1994 200 Overnighter, Single Axle Easy Load'r Galvanized Trailer, 2009 Chevy Trailblazer
    Single 1994 Mercury Black Max V135 O/B
  3. Third Edition

    Third Edition Active Member

    153
    Apr 9, 2017
    NE Florida
    360 Sundancer 2002
    T-8.1L V-drives
  4. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    If you listen closely, you can hear a "gurgle" sound coming from the fill. When you hear that, stop - it is full. This is absolutely normal and is common to pretty much all small (and some large) boats.

    The previous owner of my Grady installed a whistle - while I don't know what brand it is, it is definitely noticeable - which certainly makes things easier.
     
  5. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Chattanooga TN/Dickson TN
    1998 SeaRay 290 Sundancer
    Twin EFI 5.0L w/Alpha 1 drives
    It's to bad my fuel vent is on the opposite side of the boat.

    I can't hear it and when I eventually hear the gurgle from the fill it's to late. :(
     
  6. Third Edition

    Third Edition Active Member

    153
    Apr 9, 2017
    NE Florida
    360 Sundancer 2002
    T-8.1L V-drives
    My ears & the other noises at gas docks makes gurgle-listening unworkable for me.
     
  7. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    The gurgle comes from the deck fill plate, not the vent.

    I put Ocean Accessories vent whistles on my 390EC. The fill hose was almost horizontal so you got very little warning when the tank was full. The whistles drove the dogs crazy and the fuel dock guys hated them, but if you stop pumping fuel when you got tired of the noise or when the whistle stopped, you don't spill a drop.
     
    Third Edition likes this.
  8. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    I did see the Ocean Accessories whistle, it looks to be the same as the Green Marine whistle, and I believe there is another brand with a whistle that looks the same, I figured Green Marine made them all and just allowed the others to put their own name on them. As far as listening at the filler for the gurgle, most of the time I fill at the gas station down the street and the noise of other vehicles going by drowns out hearing anything at the filler.
     
  9. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    Yeah, you do have to get your ear pretty close to the filler to hear it with ambient noises around. I've never once gotten spit up on, though. Still doable (depending on age of your ears, I suppose!), but there's no doubt the whistler makes things easier.
     
  10. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    Thanks for the info, I may go a different direction. I have seen alot of good things said about the Racor LG100 fuel air seperator. It costs about 3 times as much, but, no annoying whistle and pump nozzle shuts off automatically just like filling your car from what I have read on line.
     
  11. Third Edition

    Third Edition Active Member

    153
    Apr 9, 2017
    NE Florida
    360 Sundancer 2002
    T-8.1L V-drives
    If you're filling up at a gas station the auto-shutoff may work just fine. Gas docks not so much IMO.
     
  12. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    Third addition, are you saying even with the LG100 separator installed the pumps at the docks won't shut off in time to stop full spitting back. Just asking because I don't want to waste the money if it doesn't work.

    Anybody on here with experience with these air fuel separators?

    One test I saw from Boat US Foundation said it was the only device in the test that stopped fuel spitting back on each and every test they did. They also said in the test the fuel nozzle they used was a marine fuel nozzle like they use at the docks,purchased from a marine product distributor and it shut the flow off automatically.
     
    Last edited: Sep 24, 2018
  13. Third Edition

    Third Edition Active Member

    153
    Apr 9, 2017
    NE Florida
    360 Sundancer 2002
    T-8.1L V-drives
    Hi NY Dad. I have no experience with LG100 separators. I do have significant experience with pumps at the docks not shutting off when gasoline hits the nozzle. That is why I went with the whistles. No spills anymore.

    My assumption has always been that fuel docks may not have top notch fuel nozzles, and that the shut-off mechanism isn't to be trusted. With LG100 separators that may not matter.
     

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