Boat Gas Tank Not Venting

On one occasion my engine quit running as the pump could not overcome the vacuum.

Boat gas tank not venting.

When installing a vent hose avoid sags aka traps anywhere in the vent. Some boats will have explosion proof exhaust fans to vent the area prior to starting the engines and others will have will have proper ventilation built into the locker design. My gas tank is not venting this is not a filling problem it is not venting as it is taking gas from the tank. I m sure it has to do with the enviro system.

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. No fuel tanks can be made with a free flowing vent. A boat fuel tank overflow can be caused by a clog in the vent. Close the manual vent after you have finished filling the tank.

Many fuel vents have fine wire screens that keep out minute debris as well as. They have to hold back vapor pressure until 5 5 psi. Don t trap fuel in your boat s vent line. Thanks for your question.

Clean the screen on your fuel vent. I run about 5 gallons of gas from a full tank and end up with a vacuum in the tank when i remove the gas cap. Keep your through hull vent. Open the manual vent valve if the tank does not have an automatic vent or a one way air check valve installed before you remove the cap to fill the tank.

Open the vent after you connect the fuel hose and tank to your motor. Complete instructions on how to fix a fuel tank that has been clogged by insects. I fully expect them to start with an expiration date just like any other gas bottles like oxygen or acetylene. If in doubt take the tank off the boat to open the vent and make sure that there are no fuel fumes on the boat prior to starting the motor.

Taking a look on the outside of the hull and seeing if the vent is even there if it is corroded broken or upside down.