Here’s some different methods of finding the cause of air in your fuel lines on your outboard motor!

Plumb in a clear piece of hose into the fuel system, as close as you can to the VST tank. Somewhere after the primary fuel filter. Monitor the hose for the presence of bubbles while the motor is being run at high power. Or, have someone pump the primer ball continuously while the motor is being run at high power.

Air bubbles are caused by any air leak on the vacuum (suc‑ tion) side of the fuel system from the fuel tank pick‑up to, and including the lift pump. If there is an air leak in the fuel system, air bubbles will be present in the clear cover of the Fuel Pro.

Insert the clear hose into the fuel line, prime up the engine, and start it up! Let it run for a little while and carefully watch the fuel passing through the clear hose. If you see a ton of air bubbles coming from the boat fuel tank side of the hose, then we are hot on the trail to solving this issue!

I hope this helps you

Follow Me On Tik Tok - Fwithaustin

Follow Me On Instagram - Fishing_with_austin1