Sierra 18-7802 Fuel Filter Element
- Brand:
- Sierra
- Part no:
- 18-7802
Image: Fisheries Supply
Where to buy
Specifications
- Micron rating
- 149 micron
The Sierra 18-7802 is a replacement fuel filter element for Mercury and Mariner outboards. It has a compact shape made for the filter housings that sit under the cowl. It filters to 149 micron, and an O-ring is included so you can renew the seal on the filter housing when you change the element.
Our take
The included O-ring on this Sierra 18-7802 element means the housing seal can be renewed with the element. Its compact shape is made for under cowl housings on Mercury and Mariner outboards, and it filters to 149 micron.
From our buying guide
Parker lists Racor's marine Turbine Series for diesel and biodiesel engines, and Racor says gasoline filters in an enclosed location should use a metal bowl. A micron rating means little without its efficiency.
Check before you buy:
- The efficiency is stated with the micron size. Racor labels its finest element 2 micron and rates it at 98% at 4 microns.
- You know your engine's change interval, since intervals are per model.
- You can fit it on the suction side of the fuel transfer pump, where Racor says to install its 900MA and 1000MA, since pumps emulsify water.

