I'm thinking the 6 amp alternator may actually be there to charge a small
battery for running lights etc, just guessing.
I haven't seen an electric start
outboard that had the
battery as part of the
engine, but we have speculated on this forum that one of those lightweight LIFE motorcycle
batteries would easily do the trick and they weigh about a lb or two, could mount it on the outside cowling. I have one in a 450 cc Husqvarna and it starts that easily so an outboard would be even easier to start I'm sure.
If the alt. is there to charge a small battery one of those LIFE motorcycle batteries should be able to run a small
bilge pump, otherwise your removing it and
charging it every so often.