Lycoming O-320 E2D on a Thorp T-18. I hope I can post here in the engine forum since I am a T-18 guy (although I did start an RV-3 back in the early 80"s ).
I removed them to change out gaskets, I "thought" I understood the process but am having an issue timing the left mag. Here is the process...
a-I removed the mag without using the timing pin thinking I could time it before reintallatiion.
b-I removed the mag, cleaned the mating surface and replaced the gasket.
c-I then used the Lycoming timing pin as directed turing the shaft till the pin seated.
d-I then located TDC on #1 cylinder (right front as viewed from the cockpit).
e-I then backed up to 25 degrees BTDC (mark on starter bracket and ring gear aligned).
f-I then re-installed the left mag with the pin in place, wiggling it about to get the teeth to mesh.
The marks I put on the mag and case before disassembly are pretty close indicating I should be "in the neighborhood".
g-I then hooked up the buzz box and note the right mag is timed properly but the left mag is waaaaay off!
Where did I go wrong?
Thanks
Tim
I removed them to change out gaskets, I "thought" I understood the process but am having an issue timing the left mag. Here is the process...
a-I removed the mag without using the timing pin thinking I could time it before reintallatiion.
b-I removed the mag, cleaned the mating surface and replaced the gasket.
c-I then used the Lycoming timing pin as directed turing the shaft till the pin seated.
d-I then located TDC on #1 cylinder (right front as viewed from the cockpit).
e-I then backed up to 25 degrees BTDC (mark on starter bracket and ring gear aligned).
f-I then re-installed the left mag with the pin in place, wiggling it about to get the teeth to mesh.
The marks I put on the mag and case before disassembly are pretty close indicating I should be "in the neighborhood".
g-I then hooked up the buzz box and note the right mag is timed properly but the left mag is waaaaay off!
Where did I go wrong?
Thanks
Tim