I was wondering if anyone else has experienced the following failure on a Onan B43G engine.
While mowing (tractor did not hit anything) the engine destroyed a number of teeth on the crankshaft and camshaft gears. The oil pump looks alright with no damage. After engine disassembly I cannot find a cause of the failure. The crankshaft, rods, pistons, valves, springs and valve guides are all in great shape. The only failures were the gears. I hate to spend a lot of money fixing this and not know the cause. I have also included a picture of the case and assume the hole next to the crankshaft should be there it looks machined but I have nothing to compare it to.
Also will gears from an Onan P218 fit a B43G?
Any help would be appreciated