Gone Outdoors

How to Replace an Engine Coupler

by Aram Khayatpour

A faulty engine coupler is a serious problem for any boating enthusiast. Engine couplers that are failing will not be able to turn the outdrive effectively, and thus your boat will not be able to turn the power of your engine into usable force, which will drive your boat forward. To fix this problem, you will need to replace the engine coupler, which will require moving the engine in order to access it.

Remove the bolt on the propeller and push the tab in, then remove the propeller from the outdrive.

Remove the trim cylinders from the sides of the outdrive, making sure to support the outdrive while doing so in order to keep it from damaging itself or other parts.

Remove the bolts and the washers on the outdrive, then remove it. Standard outdrives have six bolts, though some could have more.

Hook the engine into the engine lift and remove the engine mounting bolts. The position of these may differ based on your engine, but they will most likely be underneath or between the exhaust manifold of your engine, on each side. Please refer to your owner's manual for exact positions.

Lift the engine carefully to reveal the old coupler, then remove it by unbolting it from your engine.

Align the new coupler so that it is in the same position that your old one was in, then bolt it into place.

Carefully lower the engine and bolt it firmly into place with the engine mounting bolts.

Reattach the outboard motor by bolting it into place with the washers and bolts that you removed in step three.

Reattach the trim cylinders and the propeller. Tighten and check all the connections before turning on your engine.

Items you will need
  • Engine lift
  • Wrench
  • Wrench extension


  • Make sure to read the instructions on the engine lift properly to avoid any damage to the engine or any injury to yourself or others.