Long story, took the boat out last weekend no problems, went to take the boat out yesterday and batt. 1 was dead, figured I left something on during the week, no problem switch to batt. 2 starts right up, turn to ALL and charge up batt. 1 while running. stop a few times here and there starts everytime. switch back over to batt. 1 and sit for a few hours to watch the fireworks with some accy's on, start and stop a few time to move the raft up no problem, sit another 1/2 hour since the last time I started it and when we went to leave no start. figure it's a bit strange it just started, anyway switch to batt. 2 starts right up, swith to all and have about a 6 mile or so slow wake zone till we get to the ramp, half way back to the ramp I get a BEEP check all gauges and everything seems fine except the voltage is very low 10-11 volts, figure slow speed not charging, bump up the rpms and nothing, usually runs 12-13 volts, kill everything except for nav. lights no beeps but still not charging, another couple of miles and i'm getting a beep and another and just as we get back to the ramp a solid beep while the wife is getting the trailer, get worried and shut her down, wife backs in and no start, on batt 1 or on 2 totally dead. Without a scan tool i'm going to guess the beeping was low voltage warning, I'm also going to guess there is a charging system problem. Today I checked all my connections between batts, and motor,,, everythign was tight,,,, Anybody know of ANYTHING I can check on my own before I bring it to the dealer,, how do I test the alternator ???? TIA. Chris...

Put a battery charger on it overnight and get both batteries up to normal. Fire it up and check your voltage at the battery. It should be around 13.5-14 with the engine at a fast idle. If it's not, you either have a dead alternator or a wire problem. I got rid of the mando alternator and went with a delco 1 wire because it's cheaper.

Thanks for the reply, It is the Alt. getting it rebuilt today. cant believe how much rebuilding an Alt. costs these days... used to be able to get one done for about 40-60, this one is 140.00

you are getting ripped off I have had mine rebuilt for $65.

Don't put the switch on "ALL". Self-inflicted wound.

All is for a jump start only. Once running put it on one or the other.

Thanks for the tip Rick, didn't know that... I always start and run on 1, when I take a long cruise, I usually went to ALL to charge up #2, from now on I'll charge #1 on 1 and #2 on 2..