Prop cavitation
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Re: Prop cavitation
is this the same boat that you bought new that had ride, planing & porpoising issues?
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Re: Prop cavitation
Reducing the pitch will increase the rpm I would have thought your rpm should be closer to the recommended. I have read that reducing the pitch will reduce cavitation. I can’t help you with a good mechanic I do most of mine myself if I have needed specialist help I have gone to port Phillip boating centre in hoppers having only had yamaha’s They have done a few jobs for me and have been ok they also have given me good advicesturgeon wrote:Yes, aluminium is pitted where the paint has come off. Initially I thought that was due to electrolysis due to the exposed aluminium but after rading about it, I realized that it is actually cavitation.
The max RPM is supp to be 6000. I am getting 5300 rpm. I am OK with the RPM. The issue from what I read is that overtime, cavitation would destroy the prop through the pitting. I have not gone to the back to look at the plate when I am at max speed. Still not that brave. Haha. But its definitely not ventilating. I know the difference between cavitation and ventilation. Ventilation occurs during tight turns when the prop comes out of the water. It is a distinctive sound. But anyway, I do not want to focus on terminology here as there is a great deal of controversy on the definition of cavitation and ventilation.
Who can I go to around Werribee for professional help?
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Re: Prop cavitation
sturgeon wrote:Yes, aluminium is pitted where the paint has come off. Initially I thought that was due to electrolysis due to the exposed aluminium but after rading about it, I realized that it is actually cavitation.
The max RPM is supp to be 6000. I am getting 5300 rpm. I am OK with the RPM. The issue from what I read is that overtime, cavitation would destroy the prop through the pitting. I have not gone to the back to look at the plate when I am at max speed. Still not that brave. Haha. But its definitely not ventilating. I know the difference between cavitation and ventilation. Ventilation occurs during tight turns when the prop comes out of the water. It is a distinctive sound. But anyway, I do not want to focus on terminology here as there is a great deal of controversy on the definition of cavitation and ventilation.
Who can I go to around Werribee for professional help?
Not Corey Gauci.............
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Re: Prop cavitation
If you are only reaching 5300rpm you are either massively over propped or something else is a miss. You will need to resolve this as this will overload and can damage your engine.sturgeon wrote: The max RPM is supp to be 6000. I am getting 5300 rpm. I am OK with the RPM. The issue from what I read is that overtime, cavitation would destroy the prop through the pitting.
Who can I go to around Werribee for professional help?
No idea about who to talk to in Werribee but I would talk to Solas.
My gut feel is there is something on the hull in front of the prop causing a disturbance bubbles ect that is causing cavitation.
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- Rank: Kingfish
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Re: Prop cavitation
Solas is who I bought my prop from. The first prop I got to 6000 revs with only half throttle on the plane in a flash the second prop dropped the rpm to 5700 at wot really happy with it. It only cost me postage to swap it over.