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  1. K

    Engine coupler or dog clutch or something else

    Few weeks ago went boating to break in a new sei upper unit. Everything went well until the end of day when at about 4000 rpm lost power and rpms increased.. I figured it was a spun prop. Changed the prop put back in water today… ran great for 45 minutes then at about 4000 rpm same thing except...
  2. K

    Changing to stainless steel prop

    Prop started slipping this weekend. Gonna change it out in the next few days. Currently have an aluminum 3 blade 15x17p. Want to switch to stainless steel. Any recommendations on size and 3vs4 blade? With current prop 35mph top speed, 4600 rpms at WOT range is 4400-4800 Boat info 1993 Monterey...
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