Quote:
Originally Posted by Gompers
I don't doubt your friend has had 3 onans poop their pants on him, but there isn't anything inherently wrong with their design that would cause it to fail more than any other twin in that class. He's either unlucky, abusing them, or not really properly servicing them.
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Well they all did sit for a while, as every tractor around here does, so it's not really a surprise they blew up. His 982 blew up while mowing as a crank bearing exploded, and the crankshaft spinning at 3600 RPMs broke a huge chunk out from around the rear hole, which caused a massive oil leak, and the keyway for the flywheel was destroyed, both on the flywheel and the crankshaft, his 318 overheated and dieseled full throttle until it threw a rod, and his 316 had scoring all up and down the cylinder walls and three or so massive cracks (1 in one side, 2 in the other) were causing the engine to completely lose compression, and at that point he couldn't really rebuild as the the whole tractor was also seriously abused and damaged.
He threw the 316 and 318 out because it was more trouble than it was worth to fix them, and he had other projects, and the 982 was probably repairable but he had a rebuilt kubota diesel from a recently rolled 782D that was totalled to put in, so he wanted the liquid cooling. It seems like every twin cylinder he's owned has been damaged or destroyed.
He also has had an original break in half on him. I guess he's just unlucky.
Edit: He rebuilds most of the engines in tractors he gets, but he didn't rebuild the onans and a few other engines.