Tis the difference between light duty and heavy duty applications.
My truck in round numbers has 160,000 miles and 4,600hrs. Doesn't burn oil and no discernible power loss when towing. It has spent most of it's life making an average of 45HP out of it's potential 300HP.
150hrs sounds awful short even at redline and full throttle. Those engines must have been souped up and maybe even ran on regular gas when they should have had premium.
You can take a GM marine crate engine and wail the tar out of them at full throttle racing around and towing. As long as they don't knock, have clean air and some oil in them. They will run for thousands of hours.
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Today's Featured Article - The Collection of a Lifetime - by Sherry Schaefer. The larest gathering of orphan tractors ever assembled by one collector will be auctioned off on May 15 in Rock Island, IL. Ed Spiess was a well known tractor buff who spent most of his time dreaming of rare and unknown tractors. His background as an agricultural engineer sparked his interest in the unique attributes of the models built from 1939-1959.
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