johnneilson
Well-known member
You are correct, lawnmowers and such have no filter, but, more expensive generators do. In fact, lawnmowers have air filters too, go figure.
I would venture to say that the Model A, as originally designed/built could reduce the internal wear by filtering the oil and removing the dirt or other solid contaminates. Any oil lubricated machine will respond in the same manner.
The article(s) I am referring to were written in the 60's, mainly in discussion with "modern" pressure fed bearing designs. At the time the manufacturers were starting to offer 100,000 mile warranties. They still had to improve the technology and tolerances but were well on the way.
The original Model A was a compromise of design/technology and economics for that period of time. Within four years, the block, crank and rods changed to larger more robust design. It would be interesting to read about when the "B" design started, a guess is in 1930.
To me, it is a choice, my choice is to add the filter. But I also pressure feed the insert bearings, again, my choice.
Oh, and back to your original statement about Engine shops that specialize in Model A's never recommending one. That is how they stay in business, volume. Personally, I have found that if I see a rebuilders tag, or rivet holes where one was removed, I pass on working on it.
Best of luck, John
