Specifications and requirements13If oil grades listed under Recommended en-gine oil grade 1 are not available, select an al-ternative oil grade listed underRecommended engine oil grade 2.Recommended engine oil grade 1Recommended engine oil grade 2EMU36360Fuel requirementsEMU36811GasolineUse a good quality gasoline that meets theminimum octane rating. If knocking or pingingoccurs, use a different brand of gasoline orpremium unleaded fuel. Yamaha recomendsthat you use alcohol-free (see Gasohol) gas-oline whenever possible.NOTICEECM01981 Do not use leaded gasoline. Leaded gas-oline can seriously damage the engine. Avoid getting water and contaminants inthe fuel tank. Contaminated fuel cancause poor performance or engine dam-age. Use only fresh gasoline that hasbeen stored in clean containers.GasoholThere are two types of gasohol: gasohol con-taining ethanol (E10) and that containingmethanol. Ethanol can be used if the ethanolcontent does not exceed 10% and the fuelmeets the minimum octane ratings. All etha-nol blends containing more than 10% ethanolcan cause fuel system damage or cause en-gine starting and running problems. Yamahadoes not recommend gasohol containingmethanol because it can cause fuel systemdamage or engine performance problems.EMU36880Muddy or acidic waterYamaha strongly recommends that you haveyour dealer install the optional chromium-plat-ed water pump kit if you use the outboard mo-tor in muddy or acidic water conditions.However, depending on the model it might notbe required.EMU36330Anti-fouling paintA clean hull improves boat performance. Theboat bottom should be kept as clean of marinegrowth as possible. If necessary, the boat bot-tom can be coated with an anti-fouling paintapproved for your area to inhibit marinegrowth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.Recommended gasoline:Regular unleaded gasoline with aminimum octane rating of 90 (Re-search Octane Number).ZMU06854122˚F50˚C10440863068SAE APISESFSGSHSJSL20501032014-10-4-2010W–3010W–405W–30ZMU06855122˚F50˚C10440863068SAE APISHSJSL20501032014-10-4-2015W–4020W–4020W–50