Honda Marine - Technical Talk

The setup of an outboard on your boat is crucial to the performance and handling of your craft. An improperly installed outboard motor can result in the motor being dropped into the water, the boat being unable to cruise straight ahead, limited engine speed and higher fuel consumption.

Always match the engine to the recommendations as established by the boat manufacturer. Every new boat will have a manufacturers power recommendation, the maximum rated power is usually stamped on the manufacturers plate on the hull. Do not exceed this stated maximum horsepower.

Matching the correct shaft length for your outboard is crucial. Click here for further details.

Install the outboard at the stern on the centre line of the transom. See the diagram below. Ensure that the boat is well balanced.

As a general rule the outboard should be installed so the anti-cavitation plate is parallel to the bottom of the boat. The water level must be at least 100mm (3.9 inches) above the anti-cavitation plate with the motor not running, otherwise the water pump may not receive sufficient cooling water, and the engine will overheat. If the height is too low, the idle port could go underwater, causing engine damage or hard starting.

Motor Attachment

While operating the boat, check the tightness of the clamp screws occasionally. Re-check after first 15 minutes running during each use. Tie a strong rope through the hole on the stern bracket and secure the other end of the rope to the boat. This will prevent accidental loss of your engine.

Attach the stern bracket to the transom and tighten the clamp screws.
If the outboard requires bolts follow the diagram below. Apply a silicon sealant (three bond 1216 or equivalent) to the outboard motor mounting holes.
Set the outboard on the boat and secure with the bolts, washers and lock nuts.

To find your nearest service outlet use the 'Locate a Dealer' button in the store menu, or e-mail marine.help@honda-eu.com .