Yamaha Marine High Pressure Fuel Pumps

A high-pressure fuel pump compressed the fuel that is supplied to the combustion chamber. High pressure is needed when injecting fuel directly into the combustion chamber so as to ensure that the engine runs efficiently.

A fuel pump works to supply a definite amount of fuel to all cylinders irrespective of the load at a correct time interval based on the firing order. The fuel pump providing a high-pressure fuel to the injector; which then opens the valve against the spring tension to inject atomized fuel to the cylinder. A fuel pump works to supply a definite amount of fuel to all cylinders irrespective of the load at a correct time interval based on the firing order. The fuel pump providing a high-pressure fuel to the injector; which then opens the valve against the spring tension to inject atomized fuel into the cylinder. The fuel pump of marine engines is complex machinery fitted with several mechanical parts which ensure that the engine cylinders get the necessary fuel at high pressure with the required atomization. Repairing a high-pressure pump is very challenging. If the control unit has already indicated an error, a repair is usually no longer possible without special tools. Your outboard's fuel pump should last at least 100,000 miles or more. Sputtering or misfiring is a sign that the fuel pump may be on its way out. When the pump is not providing fuel consistently you will experience sputtering and may even find that the engine dies while the machine is still in motion. It's similar to running out of a tank of gas. High-pressure fuel pumps are mechanical and are typically driven by a camshaft.