i bought a used Pro Boat Recoil 26-inch
had a problem with one of 2 batteries. batt shows 12.30 volts but kept stopping after a very short run.
tried 3 times after checking if something showed wrong.

2nd batt started at 12.39 ended at 9.69 that run was good. any thoughts why 1st batt would shut down

will the cooling system pump leak. i had a small amount of water on both runs