Operation306. After the engine starts, slowly return themanual starter handle to its original po-sition before releasing it.7. Slowly return the throttle grip to the fullyclosed position.TIP: When the engine is cold, it needs to bewarmed up. For further information, seepage 30. If the engine does not start on the first try,repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asmall amount (between 1/8 and 1/4) andtry again. Also if the engine is warm andfails to start, open the throttle a sameamount and try to start the engine again. Ifthe engine still fails to start, see page 53.EMU36510Checks after starting engineEMU36520Cooling waterCheck for a steady flow of water from thecooling water pilot hole. A continuous flow ofwater from the pilot hole shows that the wa-ter pump is pumping water through the cool-ing passages. If the cooling passages arefrozen, it may take a while for water to startflowing out of the pilot hole.NOTICEECM01810If water is not flowing out of the pilot holeat all times while the engine is running,overheating and serious damage couldoccur. Stop the engine and check wheth-er the cooling water inlet on the lowercase or the cooling water pilot hole isblocked. Consult your Yamaha dealer ifthe problem cannot be located and cor-rected.Check that no water leaks from the joints be-tween the exhaust cover, cylinder head, andbody cylinder.EMU27670Warming up engineEMU27683Choke start modelsAfter starting the engine, allow it to idle for 3minutes to warm up. Failure to do so willZMU02030ZMU02856