Nobody's stated a brand or model of engine, but I've seen KOHLER advertising charts for the old cast iron flat head K-series engines that show cooling air flow is DIRECTLY PROPORTIONAL to RPM. Means at 2700 rpm they make 75% of the cooling air flow that they would make at 3600 rpm.
If an antiquated engine like that can perform to that level, a newer more modern engine should too.
The manual says run wide open because they are not buying the gas, and they can sell more rebuild parts when you run them that hard. And if the cheap diecast conn rods fail, they for sure window the block! More money from parts sales!
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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