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07 June 2005, 22:20
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#1
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Member
Country: UK - England
Town: Carterton, Oxon
Boat name: Bobb!
Make: Valiant
Length: 4m +
Engine: Suzuki 55hp
Join Date: Jul 2003
Posts: 241
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Propellor Question
I am in dire need of a new propellor for my Mercury 60hp.
Julie from Steele Dev have advised on a 13" pitch.
On ebay at the moment the same chap is advertising a "Propulse variable pitch Prop" and a "Black Max" 12" pitch prop in VGC. With any luck I can buy both for the price of one new one. As one who points his boat and goes, I know little about propellor pitch etc. Please advise?
Martyn
__________________
Live every day as if its your last and one day you will be spot on!!
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08 June 2005, 07:10
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#2
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Trade member
Country: UK - England
Town: St. Austell,Cornwall
Boat name: Essa
Make: Ribtec 5.85
Length: 5m +
Engine: 150 optimax
Join Date: Oct 2004
Posts: 1,319
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Martyn,
Whats on the boat now ( pitch & diameter?) and what speed and at what rpm are you getting that speed?
Kernow
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08 June 2005, 10:18
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#3
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Member
Country: UK - England
Town: Carterton, Oxon
Boat name: Bobb!
Make: Valiant
Length: 4m +
Engine: Suzuki 55hp
Join Date: Jul 2003
Posts: 241
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Hi Kernow
I am getting approx 30mph max on GPS. Sorry dont remember the Revs at that speed but it certainly wasnt high.
I have just taken the old Prop off the only thing I can find stamped on it is 19 and A. It measures approx 5.5" from the tip of the blade to the centre.
It has certainly taken a battering in its time and has obviously been refurbished in the past.
Martyn
__________________
Live every day as if its your last and one day you will be spot on!!
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08 June 2005, 13:38
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#4
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Trade member
Country: UK - England
Town: St. Austell,Cornwall
Boat name: Essa
Make: Ribtec 5.85
Length: 5m +
Engine: 150 optimax
Join Date: Oct 2004
Posts: 1,319
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Hi Noddy
As I understand it (probably about to get 'orribly shot down!) The pitch is the distance a prop will move forward on one rotation, the higher the pitch the greater the distance covered, its a bit like gearing on a car. That 19 on your prop may indicate its a 19" pitch which I think would be too big for your 60hp, this would also account for your relative lack of top speed and failure to achieve maximum rev's, ( my 90hp came with a 17") There are many threads on here about prop choice the best advice is to try some and see.
regards,
Kernow
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08 June 2005, 14:37
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#5
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Member
Country: UK - England
Town: Carterton, Oxon
Boat name: Bobb!
Make: Valiant
Length: 4m +
Engine: Suzuki 55hp
Join Date: Jul 2003
Posts: 241
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Many thanks Kernow
I have gone for the safe option and bought a 13" Prop from Steele Developments who have never let me down in the past.
Does anyone anything about these propulse variable pitch propellors?
Martyn
__________________
Live every day as if its your last and one day you will be spot on!!
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09 June 2005, 21:35
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#6
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RIBnet supporter
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 5,760
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Quote:
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Originally Posted by Noddy
Many thanks Kernow
Does anyone anything about these propulse variable pitch propellors?
Martyn
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WJ does
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
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09 June 2005, 22:05
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#7
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,627
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Na, I daint. It's Torqueshift, Wave.
__________________
JW.
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09 June 2005, 22:23
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#8
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RIBnet supporter
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 5,760
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that will be fifteen all then! 
__________________
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
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09 June 2005, 23:01
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#9
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,627
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Feck, when was it love 15?
__________________
JW.
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10 June 2005, 08:36
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#10
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Member
Country: UK - England
Town: Farnborough
Boat name: Eleven
Make: Arrow
Length: 8m +
Engine: 557cu, 700hp
Join Date: Jul 2003
Posts: 1,252
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Just before it became 15 all.
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