Yamaha F150D Owner's Manual

Also see for F150D: Owner's manual

Contents

Maintenance49spark plug because heat and deposits willcause the spark plug to slowly break downand erode. If electrode erosion becomes ex-cessive, or if carbon and other deposits areexcessive, you should replace the spark plugwith another of the correct type.Before fitting the spark plug, measure theelectrode gap with a wire thickness gauge;adjust the gap to specification if necessary.When fitting the plug, always clean the gasketsurface and use a new gasket. Wipe off anydirt from the threads and screw in the sparkplug to the correct torque.NOTE:If a torque-wrench is not available when youare fitting a spark plug, a good estimate of thecorrect torque is 1/4 to 1/2 a turn past finger-tight. Have the spark plug adjusted to the cor-rect torque as soon as possible with a torque-wrench.EMU28962Checking fuel systemWARNINGEWM00060Gasoline and its vapors are highly flam-mable and explosive. Keep away fromsparks, cigarettes, flames, or other sourc-es of ignition.WARNINGEWM00910Leaking fuel can result in fire or explosion. Check for fuel leakage regularly. If any fuel leakage is found, the fuel sys-tem must be repaired by a qualified me-chanic. Improper repairs can make theoutboard unsafe to operate.Check the fuel lines for leaks, crack, or mal-function. If a problem is found, your Yamahadealer or other qualified mechanic should re-pair it immediately.Standard spark plug:LFR5A-111. Spark plug gap2. Spark plug I.D. mark (NGK)Spark plug gap:1.0–1.1 mm (0.039–0.043 in)Spark plug torque:25.0 Nm (18.4 ft-lb) (2.55 kgf-m)