Depending on the motor the leak may be from the oil pressure switch or oil pressure sender. Feel below the distributor and see it there is a sending unit there
I see what you added but not sure it will help with the single engine steering wander, it's just the nature of the beast. The larger chins may cause issues on plane
I do look forward to the results
Moved the thread so you can get more views
The 2 on/off switches should be easy enough. Put 12V to one side of each switch thru a fuse. Other side of switch goes to light and pump
Welcome
Battery volts is low, showing 12V and 13.75V
Measure at starter post while running, should see 14.5V
Shut motor OFF and let set for a couple hours then test Bat it should be close to 12.6V
When I buy Lifeline or CAT Bats they don't take a core. One of these days I plan to take them to a junk yard which last time I checked (2 years ago) they were paying 25cents a Lb
Agree to find, might cause issues with others if it's in parallel with others
You sure about that, I have a pallet or old Bats (3 years or so now) and some have 3 to 4V and they haven't froze
Always best to get a damaged prop fixed or replaced. The damage will cause vibration which can cause problems with the drive. A prop shop can fix the one you have easy enough
ok, someone connected a wire in the wrong place.
Look for purple wires on the motor harness and pink wires on the EFI harness. Somehow the power is being applied
If the Main Power Relay (MPR) has a ground being applied from ECM side, then when Bat is connected it will send power through out...
This is a V6 but same for V8 motors after 1989 and uses TB4 ignition
Being your rewiring everything you could go with newer ignition like Delco EST
The rest of the wiring
