E4-16A diagnostic tachometer should be usedfor this procedure.1) Start the engine and allow it to warmup fully in Neutral until it is runningsmoothly. If the outboard is mountedon a boat, be sure the boat is tightlymoored.2) Adjust the throttle stop-screw 1 toset the idling speed to specification(see “SPECIFICATIONS” on page 4-1)by turning the stop-screw clockwiseto increase the idling speed, and turn-ing it counterclockwise to decreasethe idling speed.NOTE:Correct idling-speed adjustment is onlypossible if the engine is fully warmed-up.If not warmed up fully, the speed settingwill tend to be too high. If you have diffi-culty obtaining the specified idle, consulta Yamaha dealer or other qualifiedmechanic.q213021qwEMU00377CHECKING WATER IN ENGINE OILTANKThere is a trap at the bottom of the engineoil tank. If water or foreign matter is visi-ble in this trap, consult a Yamaha dealer.1 Trap2 Engine oil tank
