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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...
Thanks! Everything numbers wise is pretty good right now not necessarily unsatisfied with any performance, but since it have to be replaced any ways if there is any room for improvement might as well make it now. Definitely not set on stainless just know they are generally considered “better”.
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...