I've done it numerous times but I always get a little queasy jumping batteries especially of different sizes if they are totally dead and instead try a charger first. I have visions of the dead battery having a shorted cell or other internal fault and going KA-BOOM! when I hook up the cables. Chargers with the limited current if nothing else give me a more comfortable feeling.
Cool !! Yea I tried charging but didn't get any good results. The started spins or sounds like it is but the motor doesn't even try to crank. So I don't know if that info changes anything or not but trying a jump start seemed like a good next step ?
Thanks guys this is NO WAY an emergency but I will post more when I try it and check back for any other post.