Yamaha F2.5 Owner's Manual

Also see for F4: Owner's manual Brochure & specs Service manual Owner's manual Owner's manual

Contents

Specifications and requirements22Gasoline FiltrationYamaha outboard motors are equipped withinternal fuel filters. However, excessive wateror debris entering your engine’s fuel systemcould prematurely clog the internal filters,causing starting and running problems, fuelsystem damage, and internal engine damage.Therefore, it is recommended that an external10-micron water-separating fuel filter be in-stalled on your boat and serviced frequently.Consult your authorized Yamaha dealer for a10-micron filter that meets your engine’s re-quirements.EMU41341Gasoline AdditivesGasoline blends change to meet automobileemission regulations and economic condi-tions. Additives, added by gasoline distribu-tors, necessary for proper automobile engineoperation and durability, may not be sufficientfor typical boat applications. Intake valve andcombustion chamber deposits may accumu-late in boat engines more rapidly than en-countered in automotive use. In addition,gasoline used for boating will typically agelonger between refills than gasoline used inautomobiles, resulting in stale and unusablegasoline that may cause starting and runningproblems, fuel system damage, and internalengine damage.Yamaha recommends the use of two Ya-malube gasoline additives to reduce internaldeposits and extend the storage life of gaso-line. Continuous use of Yamalube Ring FreeFuel Additive Plus reduces harmful internaldeposits. Yamalube Fuel Stabilizer & Condi-tioner Plus added to fresh gasoline will helpprotect the fuel system from varnishing whilehelping to keep the gasoline’s octane levelfrom decreasing excessively during storage.Other additives may also be available on themarket that may have varying degrees of ef-fectiveness. Consult your Yamaha dealerconcerning what may work best for the locallyavailable gasoline and environmental condi-tions.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.EMU41350Anti-fouling paintA clean hull is required to maintain your boat’sperformance. Boats moored in the watershould be protected from marine growth (bar-nacles, mussels, and marine plants). If ap-proved by regulations for your area, thebottom of the hull can be coated with an anti-fouling paint to inhibit marine growth.Anti-fouling paints specifically formulated foruse on aluminum may be applied to the out-board motor. The original Yamaha paint sur-face may be scuffed lightly before applyinganti-fouling paint, but do not remove the origi-nal paint. Removal of the original paint will in-crease the rate of corrosion.NOTICEECM02410Anti-fouling paint for fiberglass and woodmay contain materials, such as copper,graphite, and tin, that can cause corrosionif applied to aluminum boats and outboardmotor components. Never apply thesetypes of paint to your outboard motor be-cause rapid corrosion damage could oc-cur.Sacrificial anodes are attached to the out-board motor to provide corrosion protectionand must never be painted.