What starter are you using?
I use my right hand - and now with help from my left since breaking both arms about seven years ago. I gave up on electric starters about twelve years ago, even since moving to Giant scale - and have not looked back. That is the way we started everything we flew U/C forty years ago. Carrying a starter around with a battery that never really did its job was too much. The guys I fly with do the same. If it don't start after several flips, there is something wrong anyway. Figure it out, fix it, and away it goes. This last weekend I started a new 3W-70 for the first time. Once I had everthing set correctly, is started on the fourth or fifth flip.
Dan