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Old 07-11-2011, 11:34 AM   #1
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Default Fuel vent problem

I have a 92 Maxum 2100SC, every time I fuel I have to keep the flow very slow or fuel will burp out the Fill (not the Vent) and sometimes I can only get 2.5 - 3 gals in the tank even though its 1/4 full. I have checked the vent tube and it is clear from the back to the top of the tank. I am not sure how to check inside the tank. Any help would be appreciated.
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Old 07-11-2011, 01:42 PM   #2
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9B,

If possible, remove the vent hose from the hull fuel fill fitting and use compressed air to blow through the vent hose towards the tank. Even easier, ensure the entire vent hose is free of kinks.

Aside from that you'll have to remove the assembly from the top of the tank to inspect the pick up and vent.

Dan
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Old 07-11-2011, 03:15 PM   #3
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Originally Posted by ss3964spd View Post
9B,

If possible, remove the vent hose from the hull fuel fill fitting and use compressed air to blow through the vent hose towards the tank. Even easier, ensure the entire vent hose is free of kinks.

Aside from that you'll have to remove the assembly from the top of the tank to inspect the pick up and vent.

Dan

The line is clear to the tank, and the fitting.... well it is a 90Deg fitting and is against the bulkhead so I am not sure how to get it out without tearing the boat apart.
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Old 07-11-2011, 03:39 PM   #4
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I wonder if the vent line, while clear, is only partially clear. I wonder, too, if the fill hose may have shifted and now has a section the runs horizontally - maybe even up hill for a stretch, before getting to the tank.

Where does the vent line connect to the tank; at the sending unit ot near the same place as the fill hose?
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Old 07-11-2011, 05:15 PM   #5
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Right next to the fill line and the supply line to the Engine fuell pump Oh and the sending unit. all the lines and sending unit are on the the top aft section of the tank. I think I am going to reposition the Fuel line and see if that helps.
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Old 07-18-2011, 03:01 PM   #6
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does anyone know if there is a "Check Valve" in the Vent system?
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Old 07-18-2011, 03:40 PM   #7
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shouldn't be a check valve in the vent.....


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Old 07-21-2011, 01:39 PM   #8
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Check if there is any leakage in tank,if you found any leakage weld it.
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Old 07-21-2011, 04:51 PM   #9
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Johnmartin...check your pm.....


can't weld a fuel tank

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Old 06-04-2012, 01:50 AM   #10
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Cool '92 1800SR Same Problem

9ball-

I have had this problem since I bought my boat "new" in 1992. Seems like the way the fuel tank is made having the vent and fill hoses so close together creates the problem. I know that filling the tank slow has been my life to keep from gas all over the back of the boat. Having the fuel hose high and filling flow on the bottom of the fill hose has had some success. Biggest reason it comes out the fill line is the vent has fuel in it leaving no vent to the tank. Must be backsplash in the tank. Not a lot you can do unless you want to change the tank, not an easy job by no means. Just wait until the ethanol has ruined your tank before you take on that task. Hope you are getting her fueled without too much mess and the price of gas.

Dean (deanries) "Go Big or Go Home"
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