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Old 30-01-2010, 18:30   #1
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Posts: 19
Question CDI Perfect Pitch Urethane Propellers

I have a Lagoon 42 ft TPI catamaran which I have repowered with Yanmar 3Ym30 engines. I need to reprop ar my 15x9 Campbell sailor 2 blade props are under propped.

I am interested in the CDI perfect pitch props made of urethane as the flex to a different pitch with different loading conditions.

Does anyone have any experience with these props?

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Old 08-03-2011, 17:59   #2
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Re: CDI Perfect Pitch Urethane Propellers

i have a 15 X 11 perfect pitch propeller from performance propellers . yanmar 2GM20F diesel. kanzaki 2.62 tranmission. nimble 30 express monohull . works very well. 6.9 kn @ 3600rpm cruises 5.4 kn @ 2250 rpm.
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Old 11-12-2012, 06:48   #3

Join Date: Aug 2011
Location: Tampa Bay area
Boat: Hunter 31'
Posts: 5,731
Re: CDI Perfect Pitch Urethane Propellers

Not spending much time here any more, but I wanted to report my experience with my Perfect Pitch propeller. I put it on my boat a year ago August when I replaced my engine.

Yesterday I had to move my boat for 3 1/2 hours in a narrow window between fog and storms. The fog lifted early and the storms came late but I couldn't count on that. It was a good test of the prop because the hull and prop had just been cleaned the day before. I have a Hunter '31 (1983) with fin keel. It is a fast boat.

In calm waters with no current, wind or significant waves, at redline the boat moved up to 6.8 knots. At 3000 rpm, the boat moved at a steady 6.0 - 6.1. This dropped off as the weather started to build (wind only) and the water in the mouth of Tampa Bay got choppier, but a lot of my travel was in sheltered waters. It allowed me to get my boat home quickly and efficiently.

I can -- literally -- parallel park that boat at a one-sided dock (of course, again in low winds and no current). I had to do exactly that the other night, and ... she did it. It took more maneuvers than a car would, but nevertheless ... (I got a 2-blade, not a 3-blade).

Perfect Pitch propellers are considerably cheaper than other props. They are not manufactured by CDI -- they are their own company -- but CDI stocks them. The sizing/pitch chart was apparently very accurate, since that prop performs so well.
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cdi, perfect pitch, urethane, propeller

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