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1984 Catalina 281 prop

A

astro1993

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Can someone help me. I have a

Can someone help me. I have a 1984 Catalina 281 with twin 230hp. WOT rpms are around 3500. The manual says WOT should be around 4000-4400 rpms. I have 12" props with the number 3217 on them. What size props are best for this boat? Do you think they were changed?
 
"If you go with Michigan Prope

"If you go with Michigan Propellers, the correct ones would be:Left-#310593, Right-#310592. These would be Michigan Dyna-Jet Cup Nibral. The size is 13x11. I have a 1985 281 and that is what the boat calls for."
 
I replaced the 305's with

I replaced the 305's with 350's but left the original props on the boat. WOT is 4600. I cruise @ 3000rpm and go 21 mph.
 
"I have 305's and cruise @

"I have 305's and cruise @2800rpm and go 28 mph, does that sound right"
 
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