Often, other fuel system components are easier to troubleshoot and eliminate. ItвЂ™s vital that you work through a process of elimination when diagnosing your outboard fuel problems. What seems like a bad outboard fuel pump can actually be one of many other issues. How Do You Know When You Got a Bad Outboard Fuel Pump? The in-line filter further separates smaller contaminants from the fuel before getting to the VST. With this filter found within the vapor separator tank, all of the fuel is filtered before it gets to the fuel pump. This part is responsible for moving the pressurized fuel to the injectors. The VST pump pressurizes fuel before it gets to the rail.

This unit holds the fuel pump and filter. This component draws fuel out of the tank and directs it to the engine. This cup filter is found on the side of the boatвЂ™s motor, sitting between the low-pressure fuel pump and the tank. To understand what you are looking at, you must first know the components of the outboard fuel system. Typically, what you think is a fuel pump issue is generally another component failing, such as a fuel pump diaphragm or bad check valve. Thankfully, outboard fuel pumps donвЂ™t fail often. When the cylinder leaks, the pump pulse signal isnвЂ™t strong enough to get the right amount of fuel to the cylinder. The fuel pump on an outboard motor works differently than the one found in your car or truck. This setup allows the pump to deliver the fuel.

This pump has a sensitive diaphragm in charge or receiving the suction signal from the piston cylinder.

Mercury 150 efi outboard problems