How to Install a Fuel Filter on an Evinrude

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Evinrude, a division of Bombardier Recreational Products, makes outboard motors. Evinrude uses spring-loaded clamps to connect the fuel lines on their outboard motors to inline fuel fuel filters, to ensure a more secure connection between the filters and the lines than that offered by the push-in pull-out type of inline filter. The filters are marked with an arrow showing the direction of fuel flow and prevent "backwards" installations. By knowing how to install an inline Evinrude fuel filter correctly, the motor's owner can keep the motor running well, even when faced with trashy fuel.

Items you will need

  • 5/16-inch open-end wrench

  • Pliers

  • Drain pan

Remove the 5/16-inch nut from the negative post, marked with the letters "NEG" or a minus sign, of your boat's battery with a 5/16-inch open end wrench. Remove the cable from the post

Squeeze the tabs of the spring-type hose clamp that holds the fuel hose and filter together. Use a pair of pliers to release the hose. Slide the clamp back on the hose, past the raised portion of the filter inlet/outlet nipples.

Set a drain pan under the filter to catch any escaping fuel and pull the hose from the nipple. Allow any fuel in the filter and the fuel line to drain into the drain pan.

Seat the filter into the hose from the tank so that the arrow on the filter, which shows the direction of fuel flow, points toward the fuel line running to the motor. Seat the filter onto the hose running to the motor. Move the clamps over the raised portion of the nipples on both ends of the filter to secure it.


  • Ensure the hoses are in good condition and not brittle or cracked.
  • Spring clamps will weaken over time, requiring replacement if they've lost their tension.
  • When you're working on your motor, disconnect the battery cable from the negative post of the battery by removing the nut from the battery post and lifting the cable from the post. Removing the negative battery cable isolates the electrical circuit from the boat's common ground, making it "electrically safe" to work on the boat's electrical or mechanical systems. Always use a 5/16-inch open-end wrench when removing the nut from the negative post of a marine battery. The positive post uses a 3/16-inch nut.
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