Home › Forum › Ask A Member › Evinrude 7516 7.5 hp Fleetwin Flywheel nut size? › Re: Evinrude 7516 7.5 hp Fleetwin Flywheel nut size?
Something’s not right. Would you have a pitch gauge in your box to check the threads? The threads could be tight from previous pounding on the crank, the opposite of how a bolt will stretch before breaking. 0.501" is way too large for a 1/2" thread so I’ll bet the threads are not only tight, but the shaft has expanded in size from pounding on the end of it. Probably best to find the proper size die and chase them.
About your 1/2" bolt measuring 0.593, wouldn’t that be 0.493 which is closer to what your crank should measure? A thread will always measure several thou under its nominal size for clearance purposes.