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Correct advance timing mark

H

helm_55

New User
Oil pump broke a couple weeks ago, twisted and
sheared the hex drive, and the distributor was
teamed out. Previous owner most likely never liked
it anyways so I went ahead and ordered a new
distributor. Got the new oil pump in yesterday, and
started the distributor replacement this evening.
According to my I & T manual, the advance timing
mark should be 26 degrees (tractor serial number
indicates it is a early to mid 1955). It states that
1958 and newer tractors should be set at 24
degrees.

Upon turning the flywheel to the compression stroke
and identifying the timing marks, there is a yellow
mark at 24 degrees. Has anyone else ran into this
before?

Just FYI this tractor was recently purchased by my
father in law and I have no idea the history of this
machine.

Thanks!
 
What tractor are you working on?

Typically, you would set base timing to "spec", probably 6? or 8?, then total advance "at speed" is determined by how the distributor's centrifugal advance is set up. Of course, this is checked with a timing light.

Do you have the base timing/static timing "spec" and can you see that timing mark?
 
That manual speaking of the 24/26 numbers , if you read very carefully, tells you to use you hands to force the centrifugal advance into its full advance position. To most of us, that is just plain weird, but that is in essence what that manual is saying. It will work, when done as said, but still a strange way to do it as far as I'm concerned.
 
Hey Bob,

Hate to admit it, but I?m very new to all of this and I?ll have to read up a little bit more to understand your questions. I?ll have to purchase a timing light, no big deal. But I did read in the owners manual a mention of what you stated about the 8 and 5 degrees.
 
Upon turning the flywheel to the compression stroke
and identifying the timing marks, there is a yellow
mark at 24 degrees. Has anyone else ran into this
before?
Click to expand...

The yellow mark was probably put there by a previous owner. I don't think that the factory would have done that.
 
Some old Deere manuals tell you to do it the same way. Weird and kind of difficult to hold the advance, turn the distributer, and tighten it down all at the same time.
 
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