Thomthom

[Thomthom]

I have a 2003 20hp 2 stroke OB that will not maintain Prime. Motor runs great for awhile then dies if I do not continue to squeeze primer ball. New hose and ball and vent is open on gas tank. Filters are all clean. Fuel pump?

[WRB]

The prime bulb line connectors may be sucking air even though it’s new.

Tom

[airshot]

Time to run some tests to find out.  Could be either fuel pump or new hose or fittings

[Bird]

Yes time to run some tests.

 

When I had issues years ago with older boats I'd hookup a 3 gallon auxiliary tank directly to the fuel supply line close to engine.

If the engine ran fine then I knew the issue was upstream.

Replace filter, hoses , tank pickup and anti- siphon valve.

If the engine was still starving for fuel I replaced the fuel pump.