Replacing Distributor

[pharmerphil3]

I had asked this once before and can not find where I wrote down the information, just too much clutter! My question is; in what position does the distributor have to be in when the #1 cylinder is at top dead. I think I am asking this right? (is it 1 o'clock?)

As always, any help will be appreciated!

[Denny Clayton]

Phil, approximately 1 o'clock is correct. Before replacing the distributor, install the cap and mark the distributor body by using the location of the #1 tower on the cap. Remove the cap and then install using the mark as a reference.

[PoconoCub]

I had asked this once before and can not find where I wrote down the information, just too much clutter! My question is; in what position does the distributor have to be in when the #1 cylinder is at top dead. I think I am asking this right? (is it 1 o'clock?)

As always, any help will be appreciated!

The rotor should be pointing at the number 1 on the cap if you have a cap with the 1 on it if not where the number 1 spark plug wire is approx 1 o'clock.

Check this out GSS-1012 Blue Ribbon Service Manual - Electrical Equipment

Scott

[Eugene]

Phil, approximately 1 o'clock is correct. Before replacing the distributor, install the cap and mark the distributor body by using the location of the #1 tower on the cap. Remove the cap and then install using the mark as a reference.

Static time the distributor. Then double check to see that/if the rotor is pointing directly at your reference mark on the distributor body.

[Matt Kirsch]

The absolute position in the space-time continuum is not critical as long as the rotor is pointing to the tower on the cap that is connected to the #1 spark plug, when the #1 cylinder is at TDC on the compression stroke.

This only works for distributors, though. With magnetos the space-time position is critical because you can't rotate a magneto 360 degrees.

[challenger]

Once you get the rotor correctly aligned to the number one cylinder peg in the distributor cap, replace the cap and with the distributor clamp downs slightly loose to allow you to rotate the distributor, turn the ignition on, pull the coil wire out of the distributor cap, hold it close to the tractor frame and slowly rotate the distributor back and forth until the coil fires. At the exact point where the coil fires, tighten the hold down clamps on the distributor without moving the distributor. This is static top dead center timing on number one.

[Eugene]

Slowly rotate the distributor back and forth until the coil fires. At the exact point where the coil fires, tighten the hold down clamps on the distributor without moving the distributor. This is static top dead center timing on number one.

You need to realize that the ignition system fires when the points open. Initially setting the points rubbing block on the wrong side of the distributor cam lobe and if you simply rotate the distributor back and forth to find the point where the system fires, the spark will be way early in the combustion cycle.

[challenger]

You need to realize that the ignition system fires when the points open. Initially setting the points rubbing block on the wrong side of the distributor cam lobe and if you simply rotate the distributor back and forth to find the point where the system fires, the spark will be way early in the combustion cycle.

You are correct. There are two sides to each lobe of a cam, the leading edge and the trailing edge. When you perform this test, make sure your spark is from the leading edge of the cam. In order to insure that you have the leading edge, move the distributor to the right far enough to make sure you are past the number one cam and the points have closed. Then, slowly rotate the distributor back to the left against the leading edge of the number one cam until you observe the spark. Then lock the distributor down. This method is a practical, real term way to insure you have spark at TDC.

[pharmerphil3]

Thank You Gentlemen! As always, you are here when I need you, thank you again!

[UK-Cub]

https://app.tvpage.com/player/845/189272/189272/3764768 you might find this useful?

Regards, David