I have a 73 or 74 model 115 evinrude with manual shift. When am in the yard flushing the engine out motor starts good every time. When I'm in the water riding for about 15 minute and stop to shut it off its hard to start and it will run my battery down. I have a hapa marine battery in it and I use the same battery for my inboard boat and it does not die.I don't know if the battery has enough amps for that motor or do I have another problem.<br />Dofunny needs some help.