Fuel Pump Kit for Mercury 21-42909A3, 21-42909A4
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SIERRAFuel Pump Kit for Mercury 21-42909A3, 21-42909A4


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Model # 8919243 | Mfg # 18-7818-1UPC # 808282196400


Fuel Pump Kit for Mercury 21-42909A3, 21-42909A4

Name Value
Application Gasoline
Dimensions 6" x 7 1/4" x 1/2"
Type Fuel Pumps

Product Overview

Restore function to a tired Mercury fuel pump

Sierra offers parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of the marine industry. To save the time of researching and sourcing individual parts, Sierra packages all the required parts to rebuild a fuel pump used on many 70hp—115hp outboards. Each fuel pump kits include gaskets, springs and diaphragms to rebuild a mechanical fuel pump. Use caution, small spring loaded components in these pumps can be lost during the rebuilding process. Boaters and technicians can be assured a Sierra part will fit the first time and restore function to OEM standards

Key Features

  • Sierra rebuild kits meet or exceed manufacturers’ specifications
  • Complete kits are designed to restore function to Mercury fuel pumps
  • Compatible with fuel pumps used on many 70hp—115hp ouboards from 1987-1993
  • Backed by SeaStar Solutions Limited Two-Year Warranty

18-7818-1 Application Guide

ApplicationOEM Part Number
Mercury Marine42909A4, 42909A3, 42909A2, 42909A1

The Sierra Engine Parts Selector

In addition to fuel pump rebuild kits, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, model and year of manufacture.


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