Good catch! And no apology needed. You read it right. I remembered to double the advance numbers but not the rpms from the chart.
Brian, those should read
0-400 rpms -- TDC (that's about as low as you can hope for it to idle) 1200 rpms -- 34 BTDC 1600 rpms -- 40 BTDC (which is pretty much the wide open running James referred to when setting timing)
And D Slater's note about modification over the years might explain any variance you find from those numbers, too, when you get it running right, as well as the slop from wear that James cited.
Sorry, Brian, for the confusion. But we're all still on the same page.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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