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 - A Tinker�s Guide to Manifold Repairs - by Curtis Von Fange. A common characteristic of keeping older equipment is that some parts to make repairs can be extremely difficult to locate. For example, finding a replacement for a cracked intake or exhaust manifold on a unique tractor or odd brand can be a frustrating and downright impossible mission. So, what is an alternative solution to scraping out that �one of a kind� piece of history? First, decide if you are one to try a repair yourself or have someone else do it. If you are uncomfortable about
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