Re: 200 hp Yamaha Charging
Hi,<br />Are You sure your battery is healthy? All cells OK? Fully charged? (charge it to make sure it is fully charged)<br />Battery connections OK?<br /><br />Battery charging components: <br />Flywheel permanent magnets, stator, voltage regulator/ rectifier and battery. <br />Rotating flywheel magnets induce an alternating current (AC) in the stator coils. <br />AC current is rectified to direct current (DC) by the voltage regulator. DC output from the voltage regulator is used to charge the battery. The voltage regulators sense the battery voltage as a measure of the batterys state of charge and regulate the DC current flow to the battery. The voltage regulator(s) usually protected by fuse(s).<br /><br />General Troubleshooting:<br />A fault in the battery charging system will usually cause the battery to become UNDERCHARGED.<br />A defective voltage regulator or a stator winding shorted to ground may also allow the system to OVERCHARGE the battery.<br />If a problem exists in the charging system, visually check the following:<br />Check for loose or corroded battery terminals.<br />Check condition of the battery.<br />Visually inspect all wiring between stator and battery for cuts, chafing and disconnected,loose or corroded connections.<br />Excessive electrical load (from too many accessories) will cause battery to run down,<br />even if the system is operating correctly.<br />If the battery is undercharged, proceed with regulator, stator, and rectifier tests.<br /><br />Above from a Mercury Service Manual, but since it is general info if will apply to a Yamaha also.<br /><br />Here I hope somone else will help You since I do not have a Service manual for the Yamaha outboard You have and can not tell You how to test the regulator, stator, and rectifier (that I assume is described in the Service Manual like it is for Mercury).<br /><br />You may get valuable info also if you search this Yamaha & Suzuki forum with the word charging<br /><br /><br />Good luck.