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Thread: Gas tank vent help

  1. #1

    Gas tank vent help

    Good evening,

    My 2000 21v gas tank is not venting when the cap is closed. Can anyone walk me through cleaning/replacing the vent on this tank? I assume it's towards the rear of the tank on top.

    Has anyone else had this issue?

  2. #2
    Join Date
    Feb 2016
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    Boise, ID
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    1,316
    Quote Originally Posted by Samuelp63 View Post
    Good evening,

    My 2000 21v gas tank is not venting when the cap is closed. Can anyone walk me through cleaning/replacing the vent on this tank? I assume it's towards the rear of the tank on top.

    Has anyone else had this issue?
    I could be wrong but I believe the vent is at the front if the tank and comes out and up thru your spotters locker to a vent that is above the rub rail, port side, near or in front of the windshield.
    Believe your boat is in the vintage that had it like that. Regardless vent will be a little round fitting above the rub rail.

  3. #3
    You will need to pull the center pedestal (center section of the back seat), then you will need to find the screws that hold in the center floor. They will be hard to find since they were drilled through the carpet into the stringer. You may get lucky and the vent tube is accessible from the pedestal opening. Remove the hose from the vent tube elbow. Remove the elbow from the tank. The barbed portion most likely will be a check valve. Test, replace or clean as needed. Verify your vent lines are clear and not kinked. Reinstall and rock on.
    It's dangerous to go alone! Take this.

  4. #4
    Quote Originally Posted by freeheel4life View Post
    I could be wrong but I believe the vent is at the front if the tank and comes out and up thru your spotters locker to a vent that is above the rub rail, port side, near or in front of the windshield.
    Believe your boat is in the vintage that had it like that. Regardless vent will be a little round fitting above the rub rail.
    It could be. So much changed during that time. If this is one of the tanks where the vent is up front, be prepared for a long ride. You will need to pull the center floor for sure, remove anything in the way from the tank to v-drive, pull the screws out of the tanks' flanges, remove bolts on vdrive mount, lift vdrive side of engine, slide tank back. Do this in this order just in case you find you don't have to lift the vdrive side of the engine.
    It's dangerous to go alone! Take this.

  5. #5
    Join Date
    Feb 2016
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    Boise, ID
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    Quote Originally Posted by KoolAid View Post
    It could be. So much changed during that time. If this is one of the tanks where the vent is up front, be prepared for a long ride. You will need to pull the center floor for sure, remove anything in the way from the tank to v-drive, pull the screws out of the tanks' flanges, remove bolts on vdrive mount, lift vdrive side of engine, slide tank back. Do this in this order just in case you find you don't have to lift the vdrive side of the engine.
    UGH!! You are telling me. We had a boat in this configuration last year that had terribly bent tracking fins(somehow one was bent to starboard and other was to port, wish I had a picture). Owner really wanted them replaced though. So I just said forget it and pulled motor, trans and v drive, as I came to the saddening conclusion that the no matter how you looked at it the tank was only going to slide a half foot and it was game over. Hopefully this isn't one of those. Not a job I am itching to do again. As I remember it though you can empty tank, undo its L-bracket mounts and slide it towards v drive as far as it would go, and it was enough to access vent hose while laying oh so comfortably in the spotters locker, at least on the one I did.

  6. #6
    Just remember the fins are held by screws. No need to pull the tank when you replace them :-)
    It's dangerous to go alone! Take this.

  7. #7
    Join Date
    Feb 2016
    Location
    Boise, ID
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    1,316
    Quote Originally Posted by KoolAid View Post
    Just remember the fins are held by screws. No need to pull the tank when you replace them :-)
    Those darn 3/8" - 16 "screws" are a pain. Especially with nuts on em. Even more frustrating when you start to turn em and they just continually turn left and never come out. I'm wondering if rudder hardware got used on fins that day and I had a bad rash of luck.
    Just don't tell me Tige used left hand screws on underwater gear in these years.
    All joking aside I'm curious how the OP came to a plugged vent diagnosis?? Can you just not get fuel into the fill?? How'd this happen??
    Last edited by freeheel4life; 02-10-2018 at 01:10 AM.

  8. #8
    Thanks gentlemen. Fortunately when they redid the carpet in my boat they didn’t screw the pedestal down. Easy to pull.

    I’m going to get it done today.

    Thank you again.

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