Today while my Atomic-4 was happily cruising along I saw the engine batt S-W voltmeter in the yellow, near 10V or so... (A 2 battery sytem: the alternator output goes to house deep-cycle positive, a West Marine combiner 50 connects charging to the engine starter battery. (No 1-2-both switch, I use a separate switch for each: 1, 2, both.) Also there is in place a 2-lead A/C charger on these batteries.) So I switch on the house circuit that illuminates a house batt digital voltmeter -- the numbers going all over the place wild, then starting to drift down, finally 14.2V. Look back up at SW engine batt voltmeter and it is going through green and right into red overcharging near 16V.
For a bit, the engine surges like it is getting throttle, then back down. A few more short surges, and finally engine and electrical settled down, with the 14.2 green volts showing as batteries being charged, engine happy without surges.
Is this alternator, instruments, coil, (five year old) batteries, charging, tune-up,??? Too many thoughts to get a troubleshooting plan, especially since I haven't gotten this to happen again at the dock. I hate to think all of these systems are bad!
For a bit, the engine surges like it is getting throttle, then back down. A few more short surges, and finally engine and electrical settled down, with the 14.2 green volts showing as batteries being charged, engine happy without surges.
Is this alternator, instruments, coil, (five year old) batteries, charging, tune-up,??? Too many thoughts to get a troubleshooting plan, especially since I haven't gotten this to happen again at the dock. I hate to think all of these systems are bad!
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