Outboard Engines by Edwin R. Sherman

Author:Edwin R. Sherman
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2009-04-14T16:00:00+00:00

Fuel Pump Strainer

The next stop in the fuel line to your engine's carburetor is either an additional fuel strainer mounted separately under the engine cowl, or in some cases, a strainer built into the fuel pump itself. I prefer the separately mounted units as they often provide an additional visual clue to fuel quality.

Some pumps have a plastic cover that can be unscrewed, exposing a screen mesh designed as the final phase in your fuel filtration system. Whenever fuel delivery problems occur, this screen or remotely mounted strainer should be one of the first items checked. Figure 7-3 shows a strainer and water separator assembly on a newer Honda engine. Note the wiring that exits from the bowl on the water separator element. This wiring is attached to a sensor that warns the operator of water in the fuel. Check your owner's manual to see if your fuel pump has this feature.

Once fuel has passed through this final filter, it enters the fuel pump for delivery to the carburetor(s). But you don't need to bother about checking your carburetor(s) before you've done a thorough job of troubleshooting the fuel-supply system. More often than not, fuel-related problems crop up in the supply system rather than the carburetor(s). At the very least, the problems are always generated in the supply system, and sometimes affect the carburetor(s).

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