Joined Mar 22 2017 Messages 2.

Pontoon gas tank vent. When you open the vent on an expanded tank fuel vapors will escape. Each pontoon is designed to provide a self contained floating facility for the storage and dispensing of Petrol and Diesel fuel for coastal sheltered marina environments. Listen as you loosen the gas cap to check whether air rushes into the tank.

This indicates a problem with the vent. There is the filler tube the pickup tube and the sending unit. Put your ear close to the tank before you fill it.

SHENGHUISS Boat Gas Fuel Tank Vent for 58 Hose Stainless Steel 316 Marine 90 Degree Flush Mount Thru-Hull Fuel Gas Tank Vent with Mounting Gasket Hardware. Some outboard gas tanks have a vent that opens as pressure inside the fuel tank drops some have a simple check valve and others have a manual vent you open yourself. The fuel tank vent is located on the outside of the boat normally relatively close to the fill port on the gunwale of the boat.

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Installs easily into existing built-in 58 vent lines. Yes the tank is in the motor pod but there is no vent hose attached to the tank. Your tank has to breathe.

If the tank is sucked in opening the vent will allow air into the tank to equalize the pressure. The fuel level of your tank changes throughout the day even if you are not driving it. Most new pontoon boats will have a fuel capacity between 20 and 35 gallons.