XL-erate
09-11-2007, 10:23 PM
Hi, folks, new around here. Rebuilding an ATC110 and just tried to install cam timing chain. The only instructions I have are from an online manual download so not sure on its accuracy.
Those instructions said to align the crankshaft woodruf key with engine centerline to cam, install cam sprocket with the 'O' at cylinder head top, and cam in correct postion for lobes. Did that on the 5th attempt and everythings looks okay on the cam chain [rollers, tensioner etc.] but I'm confused on ignition timing.
With the engine at TDC according to all of the above the timing marks don't seem to line up with anything. Those timing marks on alternator rotor are to the left of centerline about 3/4". Engine is CCW rotation, so am I just seeing that points would open maybe 10-15 degrees BTDC? Looks like it would be hard to set points without using a light or something as there's no reference point to align marks with.
I thought you used the cutout notch at bottom of alternator case for timing mark alignment, but the way it is that would put points opening about 80* ATDC!
What do you think? Any suggestions are appreciated, thanks for the help!
XL-erate
Those instructions said to align the crankshaft woodruf key with engine centerline to cam, install cam sprocket with the 'O' at cylinder head top, and cam in correct postion for lobes. Did that on the 5th attempt and everythings looks okay on the cam chain [rollers, tensioner etc.] but I'm confused on ignition timing.
With the engine at TDC according to all of the above the timing marks don't seem to line up with anything. Those timing marks on alternator rotor are to the left of centerline about 3/4". Engine is CCW rotation, so am I just seeing that points would open maybe 10-15 degrees BTDC? Looks like it would be hard to set points without using a light or something as there's no reference point to align marks with.
I thought you used the cutout notch at bottom of alternator case for timing mark alignment, but the way it is that would put points opening about 80* ATDC!
What do you think? Any suggestions are appreciated, thanks for the help!
XL-erate