Specifications and requirements15make. The type, size, and design of your pro-peller have a direct impact on acceleration,top speed, fuel economy, and even enginelife. Yamaha designs and manufactures pro-pellers for every Yamaha outboard motorand every application.Your Yamaha dealer can help you select theright propeller for your boating needs. Selecta propeller that will allow the engine to reachthe middle or upper half of the operatingrange at full throttle with the maximum boat-load. Generally, select a larger pitch propel-ler for a smaller operating load and a smallerpitch propeller for a heavier load. If you carryloads that vary widely, select the propellerthat lets the engine run in the proper rangefor your maximum load but remember thatyou may need to reduce your throttle settingto stay within the recommended enginespeed range when carrying lighter loads.Yamaha recommends to use a propeller suit-able for the “Shift Dampener System (SDS)”.For further information, consult your Yamahadealer.To check the propeller, see page 81.Propeller exampleEMU25771Start-in-gear protectionYamaha outboard motors or Yamaha-ap-proved remote control units are equippedwith start-in-gear protection device(s). Thisfeature permits the engine to be started onlywhen it is in neutral. Always select neutralbefore starting the engine.EMU41953Engine oil requirementsSelect an oil grade according to the averagetemperatures in the area where the outboard1. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)ZMU04606-x1 2 31. Propeller diameter in inches2. Propeller pitch in inches3. Type of propeller (propeller mark)1. Propeller pitch in inches2. Type of propeller (propeller mark)3. Propeller diameter in inchesZMU04607-x1 2 3ZMU05937-31 2