Many outboard engine problems can be solved by a quick check-up. A boat mechanic can provide expert advice and the right tools to keep your outboard motor in good working order. However, if you’re not a mechanic, some basic preventive maintenance will get your boat back in action quickly.

Whether you own a 2- or 4-stroke outboard, following some basic tips can help you avoid expensive outboard engine repair or replacement. For example, it is important to maintain fuel-tank connections to keep them free of rust or corrosion. You should also regularly inspect the propeller and lubricate its pivot points. In addition, be sure to keep the engine tilt and steering greased and replace sacrificial anodes (often made of zinc) as they corrode to protect your motor from electrolytic corrosion.

The Essentials of Outboard Engine Repair: A Comprehensive Guide

The mid-section of the outboard connects the powerhead to the lower unit and houses the driveshaft that sends rotation and torque to the propeller. The service typically includes draining and replacing this oil. A fresh supply of marine-grade oil will help preserve your motor’s efficiency.

Spark plugs ignite the fuel-air mixture in the combustion chamber and are a key component to an engine’s performance. During the 100-hour service, technicians will clean or replace spark plugs to ensure optimal performance.

The simplest and most effective preventive maintenance procedure is to drain the fuel before storing an outboard motor. Unused fuel degrades over time, forming a lacquerlike substance that blocks small fittings and jets. Fuel stabilizers can be used to slow this process, but the best way to prevent a difficult outboard start is simply to drain the fuel.