Thank you for double checking, I found the engine. It shows that two different rods were used on that model. Part numbers 692419 and 692420. The 692420 rod is no longer available, but if I did my research correctly, that is a .020 undersized rod which you shouldn't need. With that being said, I don't understand why you would have two different rods for the same engine. To see if you have the undersized rod, measure the crankpin diameter on each crankshaft and compare with the specs in the manual. If one of them has been ground, you may have to swap crankshafts also.