Great discussion on the 169 production dates/balance gears!
I've been wanting to throw in some thoughts, but have been REALLY busy with work. Thank goodness for weekends!
As most of you know, I've been collecting serial/engine-data of the 169/1650 models from willing forum members. The purpose of the data-base is to see if there was a trend behind which tractors were assembled with 12 fin or 13 fin tractors. I'd heard it said (many times) on this forum that only 13-fin engines are considered original engines to the 169 models, but after buying a 169 with what looked like an original engine that only had 12 fins, I began to suspect the 13-fin theory was a myth.
I've removed the owners-names from my database and posted a screen shot below.
If you look at the limited data I have thus far, you can see that there is no definate "trend" to which 169's came with a 12-fin engine and which came with a 13-fin engine. Obviously more data will get us closer to a perfect answer, so get out to your garages and storage sheds and collect more info if you have one of these tractors!
As you can see, the production dates of these tractors as listed on the database does not line up to the info Paul relayed to us about Harold's comments. I honestly don't know what to make of that. After looking at the production dates collected thus far, I have a hard time believing 169 production was somehow "crammed" into a few short months toward the end of 1974, but that is pure speculation on my part. Unless we hear something more definative from someone who was on the production-line at the time, I suspect we may never know.
While I certainly don't doubt the 13-fin's desirability among pullers to be bored out to 4" as Denny mentioned earlier, there is no question in my mind that these tractors were built with both 12 and 13 fin engines. Why that was, I don't know, but I think the comments saying
"13-fin-is-the-only-original-engine-in-a-169" are without a doubt a myth after seeing the data thus far. As you can see, there appears to be no rhyme or reason to which tractors came with 12 or 13 fin engines.
What does all this mean? I don't know, but I can tell ya my 169 is a GREAT little-yellow-tractor!!