Brief Description: More engine work for the week - 01
Lots of engine sub-system work over the last few days. The constant-speed propeller works off on engine oil. That oil is pumped under higher pressure from the propeller governor to the propeller. The forward eight inches or so of the crankshaft is milled out to work as a passage to the propeller. Most of the oil stays near the propeller with a little moving back to the engine sump. That causes a lot of sediment to settle in the crankcase passageway. The prop is off so I went ahead and scraped out all the "coke" that was stuck to the sides.
The gasket for the fuel pump arrived so I got that installed. There is a small cam in the accessory case that moves up and down and works the arm of the fuel pump. You have to make sure the pump arm is under that cam. I installed hardward bolts on the prop flange so I could move the crank and rotated the engine until that cam was retracted as far as it would go; then installed the pump. Torqued the bolts with a borrowed electronic SnapOn torque wrench...man they are nice!
To ensure the pump was on correctly I had a friend hold is finger over the outlet as I turned the engine until he felt a little pressure on the outlet port of the pump. Now I can start to fabricating the fuel line mock-ups.