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Old 21 September 2003, 15:07   #1
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Country: UK - Wales
Town: s.wales
Boat name: cowabunga
Make: ribcraft
Length: 5.85
Engine: 2x60 2 stroke Mariners
Join Date: Aug 2003
Posts: 29
Which Propellers

considering fitting polycarvbonate props with adjustable pitch and relaceable blades.i.e manufactured by Propulse/Pirannah, onto my 585 ribcraft powered by 2 x 60 hp Mariner 2 strokes has anyone any experience of these and are they to be recommended. I'm also considering going over to four blades as opposed to three to gain better thrust and mid range cruising/lower planing speeds. any feedback/experiences would be appreciated
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Old 21 September 2003, 18:19   #2
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Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
I used the Piranha for a while. It held the water well but it gave a reduced top speed. I tried various pitches but I felt the extra drag of the thick section blades plus the 4th blade limited its performance. It was fitted to an OMC 150hp. Also, they were not very accurately made and I had to remachine the taper.
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