The oil drain hose will be attached somewhere right in front from underneath the engine; It will have some brass fittings attaching it to whatever it is attached to.. If you are looking at the engine from inside the boat; take down the left wall, look or reach your hand underneath the engine, and you will find a hose coming out of the bottom of the oil pan; just follow it to where ever it is attached.
I always run my boat to heat up the oil before draining... I also let the oil drain overnight..
Thanks,
Ken Land
Bullet Lines
www.bulletlines.com