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860 Timing

M

MikeyK

Member
Hello,
I think the timing is off on my 1955 Ford 860 so I plan to check it tomorrow. I've ready many posts about static timing so I understand the process just fine. However, the original Ford shop manual and the I&T shop manual give different degree settings so I just wanted some clarification.

The Ford manual says the index mark should line up with 4 degrees on the flywheel. I&T says it should line up with 26 degrees. I&T calls this the "fully advanced timing" but the Ford manual says it would be 24 degrees at 2200RPM, not 26. Which is correct?

My main question is: If I'm static timing my 860 with the engine off, should the index mark line up with 4 or 26 on the flywheel?

Thank you for your time.

-Mike
 
Static time at 4 degrees BTDC. Alternatively, time with timing light at 4 degrees BTDC at 450 RPM or below.

Verify proper operation of the centrifugal advance mechanism before timing, either statically or with a timing light.

Dean
 
Dean,
Thanks for the reply. Does the I&T manual say 26 because it assumes you'll be setting the timing with a light while the tractor is running at 2200RPM? If so, do you know why the Ford manual says 24 degrees at 2200RPM while I&T says 26?

4 degrees is all I really need to know but I'm also trying to understand the differences in the manuals. Thanks again.

-Mike
 
What you are seeing is the difference in a x00 and a x01
If you have the Ford manual most of us have it is dated 1961.
That is the x01 era so it is quoting the more modern setting.
The IT manual gives you both the x00 and x01 reading.

So....If you set the timing at 4&#176 btdc the x00 will be 26&#176 and the x01 will be 24&#176 at 2200 rpm.
The reason for this is the 2 distributors use different weights.
The only reason for you to even check it at 2200 rpm is to make sure the weights are working properly.
And the only way to correct the reading at 2200 rpm is to rebuild the distributor with new weights.
 
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