Before pulling anything apart, check the fuel itself. Make sure there's enough of it, that it's fresh, that there's no water in it, that the tank breather is open, and on a two-stroke that it has oil mixed in.
There is no fuel left in the tank
Open ›It's always important to start with the basics. Sometimes boats use fuel faster than you expect and you may just be out of fuel. It is also possible to have fuel leaks or even have fuel stolen so be sure to check this first.
The fuel in the tank is old and has gone stale
Open ›Petrol doesn't last forever. It is generally considered to be too old by the time it is about 6-12 months old, unless treated with an additive.
There is water in the fuel
Open ›Water in the fuel tank makes an engine stall or refuse to start, and has to be cleaned out of the tank, lines and carburettor.
The fuel tank breather vent is closed
Open ›Fuel tanks need a way to let air in and out of them as the fuel level changes. This is the job of the fuel tank breather.
No two-stroke oil in the fuel
Open ›If a two-stroke outboard is run on pure unleaded petrol instead of petrol mixed with oil, the engine will overheat and seize causing it to stall.
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