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Author Topic: Prop sizing  (Read 409 times)
Ted
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« on: August 16, 2011, 10:19:54 AM »
Had posted earlier for any help to see what other boaters were using for prop size on a Rinker close to ours, do have some more info which may help out? 1993 Rinker 260 - 5.7 v8 350 CID (thunderbolt ign) boat rating 4200 - 4600 RPM, propshaft HP 250 ( only getting up to 4000RPM) seems to work hard to get on plane? presently have a aluminum blade and the only markings I can find are: A 40 21P. to give me some idea was wondering what others with the same vessel are running? also 3 blade vs.4 blade?? any suggestions appreciated.
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Gerp
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« Reply #1 on: August 20, 2011, 04:04:00 PM »
I have a 1996 FV266 I currently run a four blade 17 pitch prop. The  boat gets on plane easy but my top speed is 25MPH. I have to have the bottom cleaned to improve top speed. What is your top speed?
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Sherminator
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Location: Lebanon, Ohio
Boat: Rinker 192 Captiva
Boat name: "R" Sanity
Posts: 114
« Reply #2 on: September 03, 2011, 10:36:08 AM »
Quote from: Ted on August 16, 2011, 10:19:54 AM
Had posted earlier for any help to see what other boaters were using for prop size on a Rinker close to ours, do have some more info which may help out? 1993 Rinker 260 - 5.7 v8 350 CID (thunderbolt ign) boat rating 4200 - 4600 RPM, propshaft HP 250 ( only getting up to 4000RPM) seems to work hard to get on plane? presently have a aluminum blade and the only markings I can find are: A 40 21P. to give me some idea was wondering what others with the same vessel are running? also 3 blade vs.4 blade?? any suggestions appreciated.
It sounds like you are over propped.  thats a big boat for a 21p..  id try a 17 or a 19 pitch.  this will help with acceleration and out of the hole and should get you into your WOT rpm's of 4200-4600
good luck!
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98 Captiva 192 BR 5.0 Alpha
floater180
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Location: manhattan, il.
Boat: 2005 rinker captiva 212 xr1 w/ 5.7 mpi
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« Reply #3 on: September 04, 2011, 08:37:48 AM »
as for the blades, a 4 blade will grab better than a 3 blade plus it will pull better. when you go from a 3 blade to a 4 blade they say one inch smaller on the pitch if you found a 3 blade that works for you. say you have a 19" pitch and it works great go to a 18" pitch 4 blade. there's also a prop calulator online that will give you somewhat of a respectable size prop for your application, search boat prop calculator.
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AlexisandChad
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Location: Grosse Ile, MI
Boat: Rinker FV 260
Boat name: Bella Blu
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« Reply #4 on: September 06, 2011, 05:25:10 PM »
 watching watching watching
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1993 Rinker 260 Fiesta Vee "Bella Blu"
5.7 Merc. Bravo 2
Ted
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« Reply #5 on: September 07, 2011, 07:56:34 AM »
Thanks to all for your suggestions you have given me a good starting point, will experiment !
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