My Buddy has a Monterey 2006 with Volvo SX-M outdrive 1.60 gear ratio I believe. 5.0 engine 2bbl carb. It has a michigan wheel prop. He bought a solas Prop. When we went to install it the Thrust washer from the old prop was way too small and doesnt fit the outer diameter of the new prop. Solas says to use the original washer with their props. So we bought a Sierra 18-4223 washer. It fit the prop fine but does not slide all the way down the shaft to the tapered area. The inside hole is smaller than the inside hole of the old washer. I have found several places online that says sierra 18-4223 is same as OMC 333592 and other places that say OMC 333592 is comparable to Volvo 3852020. Does anyone know did all the single prop SX Volvo drives have the same propshaft? Was the old Cobra SX propshaft the same as a 2006 SX-M