ORIGINAL: Super08

After you find TDC and have the chart mounted on the engine make sure you are turning the engine the direction the prop turns to get the correct reading. After thinking about it I think you would get a lower reading if you are going backwards anyway.


The instructions you found on Bob's site are the correct ones. When setting the chart you have to have something in the cylinder that will not move or it will make it hard to fid TDC. I made myself a tool out of an old spark plug. The piston touches it at about 40 degrees before TDC. I rotate the crankshaft all the way around backwards and forwards until I get the exact same reading on my pointer on the chart on both sides of TDC. Once you have this you will get an accurate reading when you hook up the ignition.
Doug