Hi, I recently ran my motor over opener...ran great. just went back up north over mem. holiday, the boat does not start. it started, sputterd then died. i tested for spark...good spark...when i put alternative fuel down cylinders, it runs until it burns it up...it turns over great...but just will not start. could it be my battery not having enough voltage...fuses for fuel pump...let me know what you think! thnaks