Finally got my Yanmar 2GM20F running today. She fired right up after I installed a new exhaust riser and mixing elbow. (didn't even have to bleed the fuel system... again... indeed.)

I need to go back and tighten some connections... I foolishly brought big wrenches, of course the space to do the work is tiny... so only small pipe wrenches and monkey wrenches will get in there.

But the engine fired right up, and throttled up fine. Yeah! And now I have some spare parts... for the future.