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Props not as stated


I bought a set of props from a seller that he stated were 22 x 21 for my 390CPMY. The shafts were 1.5” so I would need the brass adapter to step down to 1 3/8” no issue here. My WOT range is 4000 to 4400. I am able to , on a GOOD day hit 4000, usually I am in the 3900 range. We run HEAVY all the time. Full fuel and water, LOTS of provisions. ANYWAY, prop shop called and said after a scan the props measure 21.2 and 20.7 and 21 pitch respectively. They originally wanted to pitch at 22 x 20 for the 4400 number, by his calculations.

I am waiting to speak to him today, as he is one of the most respected prop shops around. He is suggesting we make both 21.2 x 21 pitch. I respect his suggestion, but looking for opinions on running a 3/4” smaller prop than the 22 spec’d. I guess I should have bought new, as these were a great price at $340.00 each with shipping. However, tune is $516.00 each Nd adaptive $1.15.00. SO I am at $950.00/prop. However a new one is $1760.00 from him. What are your opinions. I am still at 1/2 price of new, so I guess I am still in good shape.

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