Sierra 18-7798 Fuel Pump Diaphragm Kit 25-90HP
Sierra 18-7798 Fuel Pump Diaphragm Kit 25-90HP
Contains: 18-7837 and 18-7838. For: 1990 CV25-CV30, 1984-199040-90HP, 1990 55, 85HP
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Sierra 18-7798 Fuel Pump Diaphragm Kit 25-90HP
Bad Gas Destroys This Part
I have a little 9.9 Yamaha. This last year is sat with bad gas in it. This was due to my negligence of not winterizing it. The fuel pump diaphragm's failed. I remove the pump and replaced these two parts. Reinstalled the pump and my engine is working great again. Easy to install about an hour or so. Fast shipping after placing my order and the parts arrived as described. Can only give it a 4 star. They should use material that old gas will not be able to damage these parts over time!