The rhythmic hum of your outboard motor resonates against the water as you navigate your boat. Beneath the surface of your boating serenity lies a world of important maintenance and care. Regularly servicing your outboard motor is essential for its performance and longevity, and the 100-hour service can help. Learn about the intricacies of this full-service routine on an outboard motor so you can keep yours in top-notch condition.

Visual Inspection

A thorough visual inspection is the first step in a full outboard motor service. This involves scrutinizing the entire thing for wear, damage, or corrosion. Technicians will carefully examine the hoses, clamps, and connections to identify issues before they escalate.

Change the Motor Oil

Changing the oil is a fundamental aspect of any motor service. Over time, motor oil can break down and lose its effectiveness. The 100-hour service typically includes draining the old oil and replacing it with fresh, high-quality oil for marine motors.

Replace the Oil Filter

The service also involves replacing the oil filter. This part traps contaminants that could harm the motor. Regular replacement ensures filtration and preserves the motor’s efficiency.

Replace Fuel Filters

Fuel filters prevent debris from reaching the motor. During the 100-hour service, technicians replace fuel filters to ensure a clean and uninterrupted fuel supply to the outboard motor.

Inspect Spark Plugs

Spark plugs are vital for igniting the fuel-air mixture in the combustion chamber. The 100-hour service involves inspecting, cleaning, or replacing spark plugs to maintain optimal performance.

Change the Lower Unit Gear Oil

The lower unit of an outboard motor houses the gears that propel the boat. Changing the lower unit gear oil is essential for lubrication and preventing gear damage. Technicians will drain the old gear oil and replace it with a fresh supply.

Replace Lower Unit Seal

Inspecting and replacing the lower unit seal is an important part of preventative maintenance. Damaged seals can lead to water intrusion and cause serious issues within the motor. The 100-hour service includes a careful examination and, if necessary, replacement of lower unit seals.

Grease Propeller

The propeller influences the boat’s performance. During the service, technicians inspect the propeller for damage. Additionally, they apply grease to the propeller shaft to prevent corrosion and ensure smooth rotation.

Replace Anodes

Anodes are often made of zinc. These parts protect the outboard motor from corrosion by sacrificially corroding. The 100-hour service involves inspecting and replacing anodes if they are worn out.

Replace Thermostats

Thermostats regulate the motor’s temperature, and a malfunctioning thermostat can lead to overheating. During the 100-hour service, technicians inspect and replace thermostats as needed, ensuring the motor operates within the optimal temperature range.

Refill Grease Points

Many outboard motors have grease points that require regular attention. Technicians will replenish the grease points to ensure the lubrication of moving parts and prevent premature wear and tear.

Yamaha outboard maintenance addresses key components to keep your motor running smoothly. Now that you’ve learned what a full service on an outboard motor consists of, you can schedule this service and enjoy cruising on your watercraft!