I just spent the day ripping up the lake with Traviss on "Problem Child" so I feel a little better than this morning. Thanks Traviss!!!
Last night I went out to test a prop on Lake Michigan. all was going well. Motor ran right up to WOT no problem (the prop was no faster than the one I currently run). Was running about 3700 rpm to see where cruising speed was with this prop. The motor suddenly seemed to be running on less than all 8 cylinders and just quit. No metal on metal noises, no bangs or knocks. Just quit. I'm now a mile from the Holland pier head. Got a guy to tow me to the ramp though (there is an embarrassing story to go along with the tow, but we won't go into that now). Motor will not start, but will turn over (or did till the batteries went pretty much dead). I am thinking ignition or something electrical because my voltage gauge never went above 12.5 volts the entire time I was out and I just put one BRAND NEW battery in the day before. All other gauges read normal. The 75 amp alternator was new this spring. I knew I had one bad battery but turns out I took out the wrong one. I may have cooked the alternator trying to charge that bad battery. When I put the hatch up the alternator was smoking hot (litteraly). Way too hot to touch. When I turned the key I only got 10.5 volts from the GOOD battery with the motor not running (remember, brand new battery). This seems wrong to me. Indicator light on the Crane box still turns on with the key on. Crane boxes will flash the light if they sense an issue. No blinking.
This morning, after Wette Vette woke me up at 7:15 (I was out till 1:00 that night, thanks a LOT Craig ) I took the bad battery out and put a meter on it. 8.5 volts. Definitely BAD. The good battery showed 12 volts. I put my other battery back in (it also showed 12 vlots after about 45 minutes on the charger). The motor turns right over and did start....but something is making a BAD noise. I'm hoping it's just the alternator bearings. Tomorrow I might (depends on whether I feel like messing with the POS) take the belt off and turn the motor over to see if the noise goes away. Spin the alternator by hand, and possibly take it to Autozone and have it tested.
Question: If an alternator simply fries and supplies NO juice to the motor, will the motor quit? Or will the motor run till it runs the batteries down?? As I understand it, Crane boxes will run down to 10.5 volts and then simply shut off. True??
Any other suggestions??