Re: Jumpstarting my evinrude???
You most certainly can, its just like jump starting a car, except that you cannot ground easily on something other than the dead batteries ground (like you can on the cars body) So you must put both cables directly on the battery.
Be certain to disconnect them the moment the outboard fires up.
If you ever have the opportunity to jump start a boat with twins, outboard or I/o. when the second engine fires up it can fry your cars alternator, I would know I melted all the connections on my trucks alternator jumping a chris craft with twin 350's