[cagrove]

Originally Posted by Putershark

Dave your issue though could also be a simple loose ground or connections that are loose behind the battery switch if you have one... Loose connections on the back of the A-B switch has burned me more than once! Well, at least till I got smart put some lock washers on them

I had the same thing...voltmeter showed a full charge but fishfinder wouldn't power up and engine wouldn't start...cranked once and then nothing. Found a loose negative terminal connection, wing nut had backed off about 1/4 turn. Tightened it up and everything worked fine. Now it's part of my pre-launch routine to check the wing nuts. I hope this helps.