I worked on the motor for a little while last night. I put some air through the rear drain plug and I could hear it gurgling, but there's definitely an obstruction. After working it for a while I got a more consistent trickle, but it's still a trickle. I was unable to get the freeze plug out because the throttle linkage was in the way. I left about a half gallon of vinegar mixed with a half gallon of water in there and I'll drain it tonight and rinse with water with sodium bicarbonate to neutralize. Lastly, I will try to get the linkages off and rinse through the freeze plug opening on Monday.
