High voltage reading (16V) on yahmaha 90

[justafluke]

By 96 90tlru outboard normaly has a voltage reading of 12.5 when not running and 14.2 at idle. The last time out it got to 16.2 (at 3400RPM) and the display started to flash. When I got back to the harbor running around 1200RPM it want back to 15.5 I assume this presents a problem.<br />Does any one have an idea as to the cause of this, can I keep using it?<br />By the way, it has been running rough at idle

 

[sirlespat]

Re: High voltage reading (16V) on yahmaha 90

I think that because the system was running well you would do well to look to the battery and wiring. My last battery showed a higher charging voltage as it deteriorated a high resistance wire would probably cause trouble starting.<br />Best regards

 

[rodbolt]

Re: High voltage reading (16V) on yahmaha 90

hello<br /> test your battery water level. clean all connections. then test the regulator as per the service manual.<br /> good luck and keep posting