Just got a 18/42 hydro Powr Kraft from 1994 (MTD, perhaps a 690 series). I feel that it cranks a bit weak. It does start in 2-3 secs, but my previous motor had a much livelier crank. The battery is reading 12.4v sitting in the tractor and I fully charged it yesterday. Is 12.4v good enough? I have heard that the battery wiring needs to be upsized on these, it is pretty substantial, but it is a gage or two smaller than my previous motor. Can this be it?