Hi guys, I am trying to correctly determine my prop slip on my Merc 150 setup. To date I have been assuming I have a 2:1 ratio but I see from the Merc Manual that there are also 2.3 and 1.85:1 options. Merc tell you the number of teeth on each pinion but to be fair that's not a whole lot of use if you aren't stripping the box now is it?
I suppose I could rotate the flywheel and see how many degrees the prop does but is that the only way of determining?
Unless you know the history of the motor, the sticker don't mean shit! stick a bit of tape, or a tie wrap on the propshaft, and rotate the flywheel with the plugs out and in gear!
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