I flew on a puddle jumper about 15 years ago where you walked on the tarmac and they asked you your weight as you got on so they could assign seats. the couple in front of me were pushing 350 each. yet told the steward 200. I said out loud. based on their reported weight vs actual, my weight...
My guess
The US uses 185# (since 12-01-2011). That number used to be 160.
The average person weighs much more
The formula for US capacity still uses 150#/person in its (Length x width) / 15
I believe the rest of the world uses 80kg and does not "round up" with outdated formula
outboards do have fuel coolers and oil coolers. however for the most part short of the Seven Marine 557/627 outboard motors, no, there isnt a heat exchanger.
That is the system we call the block buster. The system does clog, and you can not confirm the point a all drained short of disconnecting all the lines from the block and manifolds and probing with wire.
If your going to pull the boat for a proper winterization, use a 60 watt trouble light in...