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I'm going to be replacing the metal prop on my Hatz with a wood prop with a different hub thickness, so I'll need new bolts. Is there any way to determine the required length short of pulling and measuring one of the existing bolts? Engine is O-290-D, with flywheel. I've found a drawing of the (#2) flange (.27" thick) and bushing length (1.02" from underside of bushing flange) but I don't know the flywheel thickness or the unthreaded counterbore depth in the front of the bushing. The new prop will be 3.5" thick, the old was 2.75, and the crush washer is 1/4" thick.
Are they standard AN6 bolts or do they need to be special prop bolts?
Are they standard AN6 bolts or do they need to be special prop bolts?
