Yamaha F2.5A Owner's Manual

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Contents

Specifications and requirements16Recommended engine oil grade 1Recommended engine oil grade 2EMU36361Fuel requirementsEMU40202GasolineUse a good quality gasoline that meets theminimum octane rating. If knocking or ping-ing occurs, use a different brand of gasolineor premium unleaded fuel.NOTICEECM01982 Do not use leaded gasoline. Leadedgasoline can seriously damage the en-gine. 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. E85 is afuel containing 85% ethanol and must not beused in your outboard motor. All ethanolblends 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.It is recommended that you install a water-separating marine fuel filter assembly (10 mi-cron minimum) between your boat’s fuel tankand outboard motor when using ethanol. Eth-anol is known to allow moisture to be ab-sorbed into boat fuel tanks and systems.Moisture in the fuel can cause corrosion ofmetallic fuel system components, startingand running complaints and require addition-al fuel system maintenance.EMU36331Anti-fouling paintA clean hull improves boat performance. Theboat bottom should be kept as clean of ma-rine growth as possible. If necessary, theboat bottom can be coated with an anti-foul-ing paint approved for your area to inhibit ma-rine growth.Do not use anti-fouling paint which includescopper or graphite. These paints can causemore rapid engine corrosion.Recommended fuel:Regular unleaded gasolineMin. research octane number (RON):90ZMU06854122˚F50˚C10440863068SAE APISESFSGSHSJSL20501032014-10-4-2010W–3010W–405W–30ZMU06855122˚F50˚C10440863068SAE APISHSJSL20501032014-10-4-2015W–4020W–4020W–50