Fuel lines carry fuel from the tank to the outboard, the primer bulb pumps it up by hand before starting, and a filter catches dirt and water before it gets to the engine. Old fuel lines break up inside and block the flow, and a clear filter bowl is the best way to see it happening.
PHOTO Dangar Marine Outboard Guide
Installing a water separating fuel filter
Open ›A large external fuel filter with a clear bowl protects the engine from dirt and water in the fuel.
The fuel lines have perished inside
Open ›Ethanol and UV break fuel lines down from the inside, and the pieces block the fuel flow.
The fuel primer bulb
Open ›The primer bulb is a manual hand pump to fill the carburettor bowl before attempting to start the engine.