Ive done the tranny fluid down the carb. It make LOTS of smoke and you have to be careful cause if fed to much and engine dies durring you can hydrolock the motor. Its easy though. just ramp the rpms up with your hand and pour it down the carb but conservatively Its possible it could be a lifter aswell. Your battery can still die. The motor needs a load for it to actually give a good charge. Ive had a few die from starting and revving every week or so. Find a engine locally on CL or the jy to rebuild together