it's an application issue. really depends on what you wanna start...

the sullivan i have experience with.. dependable; robust and able to spin the big gassers at 24v.

mine's got a 15 cell nicad pack built right around the case so it's all a self contained unit. very handy. starts up to a g-45 with no problem at all.

of course, if you have a dependable engine that flip starts easy you don't need a starter. but thats a diffrent subject.

good luck and happy starts!