I just bought a 61 johnson 10 hp. I finally got it out on the water last night and had lots of problems with it. once i got it running it would idle fine in nuetral, it even trolled down nice! but the minute i opened it up it would bogg down then get back up and bogg down again.. it didnt sputter like if i was running it to rich or lean. It almost seemed like it was getting fuel cause a few times at full throttle it would just shut off! any suggestions would be great! thanks in advance!