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January 7, 2023 at 10:21 am
#270823
IMHO – if it runs well @ full throttle and half decent at idle, then leave it. Once you open up the crankcase, you’ll want to change bushings, then you’re in for a head gasket. There may be crankcase leakage through the top and bottom crankshaft seals. As you replace those you’ll see how bad the driveshaft receiver is and you’ll want to replace the crankshaft, then you’ll find a bit of play in the rod ends.
And…. and …. and .
PS – that’s all generic op-ed, not necessarily your situation.