CharlieWaffles
Well Known Member
So I've read the lycoming manual for verifying the magneto timing and watch several videos that other threads recommended. There is only one part that isn't clear to me.
I have found the TDC for the compression stroke for #1, and backed off to the 25 degree mark (per my data plate). I hook up my buzz box and found that my right mag (both are slick magnetos, left is a retard). is firing at 28 degrees - so definitely a little early.
I loosen the magneto hold down nuts enough to be able to rotate the magneto a little to adjust the timing. Here is where my question comes in:
Does it matter which direction I rotate the magneto?
I know there are left and right turning magnetos and they are referred to from the drive end. I forgot to look to see what my magneto was placarded. Assuming the right side magneto is right turning, then I should rotate the magneto housing clockwise when viewed from the distributor end of the magneto correct (counter-clockwise when viewed from the drive end/propeller side)? Or does it not matter when adjusting the timing like this? I haven't been able to figure out if the right/left turning only matters when installing a timing pin for installation into the engine or if it matters when adjusting the timing too.
I have found the TDC for the compression stroke for #1, and backed off to the 25 degree mark (per my data plate). I hook up my buzz box and found that my right mag (both are slick magnetos, left is a retard). is firing at 28 degrees - so definitely a little early.
I loosen the magneto hold down nuts enough to be able to rotate the magneto a little to adjust the timing. Here is where my question comes in:
Does it matter which direction I rotate the magneto?
I know there are left and right turning magnetos and they are referred to from the drive end. I forgot to look to see what my magneto was placarded. Assuming the right side magneto is right turning, then I should rotate the magneto housing clockwise when viewed from the distributor end of the magneto correct (counter-clockwise when viewed from the drive end/propeller side)? Or does it not matter when adjusting the timing like this? I haven't been able to figure out if the right/left turning only matters when installing a timing pin for installation into the engine or if it matters when adjusting the timing too.