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You misunderstood me -- Not everybody in the universe works two-cylinder engines on a daily basis. They may have all the latest devices and know-how but lack a page in a book that tells then the valve face angle or valve stem clearance values, on piston skirt clearance, or on running clearances associated with the crank -- assuming any of these parts are involved. These values are unique to each engine and can be found in a service manual peculiar to the tractor. We are responding here to a man who isn't full privy to the finer details of engine rebuilding and probably not much interested in making full knowledge of his engine a new vocation. And so we provide some clues as to how he can discern the difference between a vendor who will take on any job because he is hungry and one who is "asking the right questions"! We aren't talking about finding a race car engine-rebuilder here either -- but rather, one who has a full appreciation for the job at hand. And I (perhaps much like the original poster) for one do not get into the detail between aluminum and cast iron pistons and the like. That's part of what I pay a rebuilder for. Besides, that data somehow keeps slipping from my memory because of infrequent use; and I believe this is the same with the person asking the question. And so we seek out a person we can trust and depend upon, and then see to it that he has all the peculiar technical data for my John Deere engine! This is where we expect the services vendor to ask -- and we should be able to supply it! And if he don't ask, pick up your stuff and scram! I do not see where you can disagree with this approach from a (perhaps) one-time need for engine parts overhaul or rework. But the choice is (of course) yours! (PatB)
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