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706 timing

A

Anonymous-0

Well-known Member
book says run engine fast idle noload 2200 rpms set at 22 degrees. think this is a misprint as I have never set timing only at low idle slower the better to see mark .what is your takes on this thanks bob
 
You are setting the "running advanced" timing, so it has to be at the spec'd RPM's for the centrifugal advance to be advanced.

NORMAL instructions for an ag/industrial engine.
 
The book and answer to your timing question are correct. The early 706 tractors had a 25 degree advance, was changed to a 22 degree advance, HOWEVER you are to set either one of them to 22 degrees at rated load speed. This is where the amount of advance is important, not at low idle. It could be very possible that the springs and weights are not advancing the spark at the correct rate at lower speed and then if you time it at that speed it can very well be way off at full speed. The maximum advance is controlled by a hole in plate and pin on cam so it will only go to that maximum set point. Also, as pointed out by Tractor Vet many times, this advance was determined to be correct for full power usage with 93 octane gasoline. Ideally one may have to back off just a tad with the lower octane fuel we use now days if you intend to use her hard or buy the higher octane gasoline.
 
First off that timing is for a C263 and if it has a C291 then it sets at 18 degrees So best be sure what engine you have First off and also some C263's were bored out and updated to the C291 and they also set at 18 degrees . Set a C291 to 22 degrees and you will end up with a melt down . Also on any 706 you MUST run the 93 octane gas or melt down will happen .
 
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