Yeah, Brent You're right about that! That business of balancing the parts all together is a lazy man's way of doing it. Like that's the only engine that part will ever be on, It sounds like a great idea but balancing separately seems better, more reliable. But the 63 Lbs whirling mass is the largest amount of weight of that particular assy and therefore the one most likely to affect the running.
Roy, you might consider taking a few lbs off of it. The engine will rev up faster and there is less weight on the rear bearing (It'll be easier to reinstall ) The plans for taking it down are available here. I lowered mine to about 56 -57 lbs ,
about 10% but it was on the outer dia., where it helps the most. Check your ring gear for wear, it may need replacing.
Terry
Quote:
Originally Posted by BRENT in 10-uh-C
So the bigger issue you have is how do you know what the crankshaft is balanced to? Is it possible the crankshaft & flywheel were balanced as an assembly? While this habit has been frowned upon during recent years, it was normal protocol for engine rebuilders several decades ago to do the two as a package.
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