Operation25amount and try to start the engine again. Ifthe engine still fails to start, see page 48.EMU27670Warming up engineEMU27680Choke start models1. After starting the engine, allow it to idlefor 3 minutes to warm up. Failure to doso will shorten engine life. Gradually re-turn the choke knob to its home positionas the engine warms up.2. Check for a steady flow of water from thecooling water pilot hole.CAUTION:ECM00510A flow of water from the hole on the ex-haust cover shows that the water pump ispumping water through the cooling pas-sages. If water is not flowing out of thehole at all times while the engine is run-ning, overheating and serious damagecould occur. Stop the engine and checkwhether the cooling water inlet on thelower case or the cooling water pilot holeis blocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.EMU27740ShiftingWARNINGEWM00180Before shifting, make sure there are noswimmers or obstacles in the water nearyou.CAUTION:ECM00220To change the boat direction or shiftingposition from forward to reverse or vice-versa, first close the throttle so that theengine idles (or runs at low speeds).EMU27763Forward (tiller handle and remotecontrol models)Tiller control models1. Place the throttle grip in the fully closedposition.2. Move the gear shift lever quickly andfirmly from neutral to forward.ZMU02856ZMU02030