I have a 1969 Johnson 40 HP, electric start.<br />There is no charging system on this engine.<br />Which type of battery should I use, starting or deep cycle?<br />Thanks,<br />Gordon
Hello,<br /><br />Get yourself a good deep cycle marine battery. You don't want to be stranded out in the middle of the lake. I went to Wal-Mart this year and bought a champion I beleive for $60.00 has a 12 month free replacement warranty. I have went out in my boat a few times so far and hasn't let me down.
Because it will not be immediately getting charged back up you should go deep cycle regardless of day or night. Get a bigger deep cycle if going at night. Almost any deep cycle can handle starting a 40. The more expensive AGM deep cycle batteries can handle starting high compression V8 motors, and even the ordinary flooded cell version can handle many outboards easily. I have only used deep cycle on my 55 horse motors and would have it no other way.
I have a 1974 25HP Johnson with electric start and no charging system. I also run a trolling motor and I have always used a deep cell marine battery with no problems. I would suggest getting a small 5 to 10 amp charger for a overnight charge, so you will be ready for the next trip.
