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23 January 2014, 09:26
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#1
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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I am after some advice. What diameter and pitch prop will I need for an Avon SR4, 50hp 4 stroke, will be used mainly 1 up but occasionally with 2 people, 25l fuel under the console, another 25l in the bow + anchor and chain, I weight 15 stone
Which prop should I order with the engine ?
Chris
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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23 January 2014, 10:59
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#2
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Member
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
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Chris - I'll look at mine when I get in about sixish .....not a million miles away on streaker - probably the same sort of weight with consoles / frame/ kit / petrol/ anchor etc .
I think a 13 pitch no ide aon diameter
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23 January 2014, 12:37
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#3
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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It would help if you said what make of motor you're talking about and the gear ratio of the lower unit. 
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23 January 2014, 13:17
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#4
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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14P x 10 3/8.
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23 January 2014, 15:32
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#5
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Honda bf50
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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23 January 2014, 15:45
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#6
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Member
Country: UK - England
Town: Wirral
Boat name: Tigger
Make: Osprey Vipermax
Length: 5m +
Engine: Suzuki DF140
Join Date: Mar 2013
Posts: 320
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11x15HQ
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23 January 2014, 17:18
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#7
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Quote:
Originally Posted by Mollers
14P x 10 3/8.
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How many blades and made of which material?
I believe you have the exact setup I'm looking at (from your profile)
What sort of top end speed do you get one up and what is the holeshot like? What RPM does the engine reach at WOT?
Would you recommend the BF50 on a SR4?
Chris
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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23 January 2014, 18:23
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#8
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Member
Country: UK - England
Town: Wirral & Caernarfon
Boat name: That's Enuff
Make: Revenger & Avon SR4
Length: 7m +
Engine: Honda 150HP & 50HP
Join Date: Jul 2011
Posts: 4,423
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Quote:
Originally Posted by chris.moody
Would you recommend the BF50 on a SR4?
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Yes 
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23 January 2014, 18:28
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#9
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Member
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,872
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Honda 3 blade s/s. 30knots top end (a little more can be achieved, but bottom end would suffer). Hole shot and acceleration are superb. The s/s prop was significantly punchier than the previous alloy of the same pitch. Not tried any other engine options on an sr4, but very happy with the bf.
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23 January 2014, 19:36
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#10
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Member
Country: UK - England
Town: Wirral
Boat name: Tigger
Make: Osprey Vipermax
Length: 5m +
Engine: Suzuki DF140
Join Date: Mar 2013
Posts: 320
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Hi ChrisYes I have 4.8 rib/Honda bf50 3 blade alloy prop.
Mollers has said it all really.
I generally have 2 up. Performance awesome 28 knots.
No regrets.
Mr Caton also has a BF50 with his SR4
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23 January 2014, 20:42
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#11
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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What size and pitch alloy would be best? The engine will come with an alloy prop of my choice. I may buy a stainless as well but want to get the best allow I can.
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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24 January 2014, 12:03
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#12
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Am I correct in thinking alloy and stainless are not interchangeable with the same pitch and diameter, so if you switch between the two you have to change dimensions ? If that's correct and a 14P x 10 3/8 stainless is the right prop, what size alloy should I get ?
Chris
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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24 January 2014, 12:40
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#13
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Member
Country: UK - England
Town: Wirral & Caernarfon
Boat name: That's Enuff
Make: Revenger & Avon SR4
Length: 7m +
Engine: Honda 150HP & 50HP
Join Date: Jul 2011
Posts: 4,423
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Chris, if it helps I've got ally n stainless props for my honda, obviously neither tried yet, you're welcome to borrow both the help you make your decision, I'll check sizes later
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03 February 2014, 17:50
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#14
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Honda dealer has suggested either 12p x 11 3/8 or 13p x 11 1/8 3 blade alloy on a bf50. What are the ribnet thoughts on this, which should I go for?
Chris
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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03 February 2014, 22:06
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#15
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Member
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
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Quote:
Originally Posted by chris.moody
Honda dealer has suggested either 12p x 11 3/8 or 13p x 11 1/8 3 blade alloy on a bf50. What are the ribnet thoughts on this, which should I go for?
Chris
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Ask for both..with the second at a huge discount..then use what suits and have one as a spare :-)
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03 February 2014, 22:31
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#16
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Quote:
Originally Posted by PeterM
Ask for both..with the second at a huge discount..then use what suits and have one as a spare :-)
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The dealer has done me a really good deal on the engine, it would be rude to ask for more discount.
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Chris Moody
Rib Tigga an Avon SR4 Rescue
MMSI 235910073. Callsign T123046
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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03 February 2014, 23:07
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#17
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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Quote:
Originally Posted by chris.moody
The dealer has done me a really good deal on the engine, it would be rude to ask for more discount. -- Chris Moody Rib Tigga an Avon SR4 Rescue MMSI 235910073. Callsign T123046
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if you don't ask you don't get !
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SPRmarine / SPRtraining
RYA Training Courses & Safety Equipment Sales
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04 February 2014, 07:54
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#18
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Member
Country: UK - England
Town: Wirral & Caernarfon
Boat name: That's Enuff
Make: Revenger & Avon SR4
Length: 7m +
Engine: Honda 150HP & 50HP
Join Date: Jul 2011
Posts: 4,423
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Quote:
Originally Posted by chris.moody
Honda dealer has suggested either 12p x 11 3/8 or 13p x 11 1/8 3 blade alloy on a bf50. What are the ribnet thoughts on this, which should I go for?
Chris
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if it helps, my ally prop is a silverline 3 blade 13", part no qa2076x 10 1/2" dia with a Flo-torque reflex hub kit, part no 835257q12, let me know if it's any use to you, sort something out
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04 February 2014, 19:18
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#19
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: snagglepuss
Make: Shetland
Length: 6m +
Engine: 90 hp Outboard
Join Date: Nov 2011
Posts: 562
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Quote:
Originally Posted by SPR
if you don't ask you don't get !
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Oy Scott your next service bill will be going up then pal if you keep making comments like that!. 
Dave
ps I have another RNLI project for you and lost your number so can you call me
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04 February 2014, 19:42
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#20
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Member
Country: UK - England
Town: Daventry & Beaulieu
Boat name: Tigga2
Make: Ribcraft 4.8
Length: 4m +
Engine: Honda BF50
MMSI: 235900806
Join Date: Jun 2011
Posts: 984
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Quote:
Originally Posted by clydeoutboards
Oy Scott your next service bill will be going up then pal if you keep making comments like that!.
Dave |
I'll take that as a no to a second prop cheap then 
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Chris Moody
Rib Tigga an Avon SR4 Rescue
MMSI 235910073. Callsign T123046
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Chris Moody
Rib Tigga2 a Ribcraft 4.8 with a Honda BF50
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