I bought a michigan stainless apollo 15.5 x 17 prop from a craigslist seller. The prop is in nearly new condition. From the Michigan web site info, the prop is SUPPOSED to fit my 1984 Johnson 175. When installed, the prop just barely misses the cavitation plate. If I press up on the prop I can make it hit the plate, and I expect the force of pushing the boat will deflect the blades slightly and it will hit.
I could try to resell it or have it resized.
What is the minimum clearance needed for proper operation? 1/8"? 1/4"?
--Kevin