I have 9.9 4 stroke merc.With a tiller handle it doesn't have any charging abilty.I got the motor for a VERY VERY great price I couldn't pass it up.But if you have the Yamaha T8 that is a great Motor.That will be good for charging your batterys but It still might be to your benafit to get a secound battery and hook it up to a switch like the one I posted for you.You asked me about the trolling motor I LOVE to fish for what ever wants to Play so I enjoy bass fishing for smallies with fly rods and ultra light gear when I'm not trolling.I don't eat fish I'm just like alot of you guys I love to be on the water playing with what ever what to bite.
just saw a chart showing high output alternator standard on the F20 and F15C 4-stroke yamahas. optional on the 6 and 8hp. Nothing indicated for the 9.9hp or 4hp. don't know why.
Floydo,
Yamaha makes a high Thrust 4 Stroke motor called a T8 One of the best motors for kickers out there.Here is the specs.They do have an alternater.Hope this helps.
