As it states i am trying to figure out if my alternator/battery gauge are working correctly. Recently i replaced my battery on my boat as the one that had been sitting in it throughout the winter died. Originally i just recharged it after it was winterized but it always seemed like after it sat for a few days that it had a hard time starting. And when i would get into the boat after it sat a few days and would turn the key the battery gauge would read just above 8 volts until it turned on and i raised the rpms the gauge would rise up to about 13(center point on the gauge) volts and after it ran a little it would start up fine. Well i finally replaced the battery because i went to start it the other day and it barely turned over.
After putting the new battery in i noticed the gauge would only rise up to about the 13 volt mark once the rpms were raised? With my experience with cars that have had battery gauges as well as general charging knowledge, they would immediately jump to 13-14 volt mark once started and my understanding that an alternator is regulated at 14 volts running, and that the battery would be 12 volts stagnant and not running. Why does my battery gauge only go up to the 13 volt mark after the rpms are raised and not while its just idling
NOTE: this is only upon start up, once the boat has had the rpms raised it will stay at the 13 volt mark idling or not until turned off and restarted)?
Is this normal or does it sound like there could be a low rpm charging problem? Could my belt being too loose cause this i can just about flip the belt totally upside down, however it doesnt squeak or seem to slip? I havent had a chance to attach a voltmeter, but i was wondering if these gauges are pretty accurate or if i should be looking into testing it?
ALSO: what weight gear lube should i put in the reservoir, and what type of power steering fluid should be used?