Prop size suggestions - '84 20SF with '01 200 HPDI

mbo_1971 · #1 07-11-2008, 05:31 PM

84's were pretty heavy boats - 2100lbs dry. believe the tank is 50 or 70 gallons. Mostly a Chesapeake Bay boat. What sayeth the prop gurus? Thanks in advance.

eggsuckindog · #2 07-12-2008, 03:22 AM

19 I say, trading my T Top for your more weight, wonder where the 500+ lbs are? Mine turns 5600 to 5800 with a 19

mbo_1971 · #3 07-12-2008, 10:25 AM

Ahhh - i should add I also have a T-Top on her. Not sure that makes a difference. Evidently the early 80's non-tracker and non-potter (think those were the SIC era boats IIRC) were heavy fuggers. Lots o glass.

thanks for the suggestion.

Fr. Frank · #4 07-16-2008, 09:06 AM

Tell me gear ratio, and whether you have bottom paint.

I think Dixon is close, though. 19P cupped 3-blade stern-lifter, with some level of progressive rake if you are mounted high. Or maybe go to 16P or 17P cupped 4-blade if you're looking for maneuverability, mid-range performance and hole shot over top end.

Tell us what yo have now, and how it performs - in detail.

mbo_1971 · #5 07-16-2008, 12:31 PM

Thanks Fr. Frank - was hoping you would chime in here. I will try and tick off your questions below...

Tell me gear ratio, and whether you have bottom paint.
- not sure, will have to check specs on motor.

...if you're looking for maneuverability, mid-range performance and hole shot over top end.
- I am more interested in midrange and hole-shot - this is a chesapeake bay boat and I get a little wary with lots of floating debris on a 20'er that would do 50+knts - just does not sound safe. If i can get a better cruise that is a bit more smooth (think in general 4's are more smooth that 3's), then that is a good thing.

Tell us what yo have now, and how it performs - in detail.
- the motor has never been mounted to this boat hence why I was looking to the group for their experience.

thanks again for any suggestions....

Blue197320 · #6 07-19-2008, 03:26 PM

ESD what diamater 19p are u running on ur boat?

eggsuckindog · #7 07-20-2008, 05:12 PM

Quote:

ESD what diamater 19p are u running on ur boat?

Not sure its just a Merc prop, I could the number if need be

Bigshrimpin · #8 07-18-2008, 11:11 PM

Revolution 4 is my new favorite seacraft prop. Rev4 gets on a plane at lower rpms than the Mirage Plus, it's better balanced (less vibration), and has the same top end. Sternlift is even better than Mirage Plus.

76Red18 · #9 07-19-2008, 06:57 PM

Quote:

Revolution 4 is my new favorite seacraft prop. Rev4 gets on a plane at lower rpms than the Mirage Plus, it's better balanced (less vibration), and has the same top end. Sternlift is even better than Mirage Plus.

And I had decided that a 17 Mirage Plus was gonna be the one! Now you got me second guessing myself.