Yamaha Grease Points - 100-Hour Service

Paying the proper attention to Yamaha grease points is the final 100-hour service step. It is advisable to grease your engines’ grease fittings more frequently than your 100-hour or annual service, but if you haven’t, now is certainly the time.

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Make sure you have plenty of Yamalube marine grease loaded in your grease gun and start hitting those Zerk fittings. Note that fittings can be contaminated by salt – especially the ones near the steering tube – so replace them if they are too corroded to accept grease. Watch as you pump fresh grease into the fitting and see if old, dirty grease or water or both push out from the corresponding space. Ideally, these cavities are filled with clean grease all the time. A light coating of grease on the tip of the trim rams will reduce friction there as well.

Next, remove the cotter pin from the propeller and loosen the prop nut. Exercise extreme caution as the prop blades can be very sharp. With the nut loosened, remove the propeller and associated prop hardware to inspect the propeller shaft. Look for fishing line that may be behind the prop and near the prop shaft oil seals. Remove any that is sighted and if the seals are intact, apply a fresh coating of grease to the propeller shaft before reinstalling the prop. Tighten and use a new cotter pin to complete the installation. This is also a great time to inspect your external engine anodes. If they are worn beyond 50%, they are spent and should be replaced.

On the powerhead itself, Yamashield Rust & Corrosion Protectant can be liberally applied to the metal surfaces – taking some care to avoid the air intake itself. If any salt residue exists in the engine pan, rinse with a light stream of freshwater prior to applying Yamashield. This product also works well on battery connections, fuel/water separator bases, and trailer parts.

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