Propellor cavatation damage

[pietervrooyen]

Hello

I recently fitted 4 blade props (Solas) on my motors (for better performance)
now about 40 hours using it, there appears cavitation damage (pit marks) on all the blades.
There are 2 zinc anode's (zincs) fitted on each transom mount of the motors. (heard that the zincs have something to do with it??)
The original 3 blade Suzuki props did not appear to have the same problem. However I did not use the 3 blade's as long as the 4 blade's

If there is anyone out there that can help me with the cavitation damage problem? How to stop it or what the cause is?
Thanks::jdski

 

[Rory]

were the props new when you bought them?

 

[pietervrooyen]

Yes , I bought them new..
Imported them from the USA

 

[Aqua Azul]

I get this in my Clymer Yamaha workshop manual. It could be wrong props.

 

[Aqua Azul]

p2

 

[Aqua Azul]

p3

 

[Aqua Azul]

p4

 

[Aqua Azul]

p5

 

[pietervrooyen]

Hi, thanks for the reply.
If the 4 blade may be the problem and that it is the wrong propellor for the motors.. Do you think that a anti ventalation plate will stop the problem... or should I run different props?
Also can stainless steel propellors get cavatation damage?
((s((peed)

 

[Aqua Azul]

I suggest you go with the following steps:
1) Estimate the correct prop size and important the correct pitch (3 or 4 blade) for your motors from a Suzuki expert.
2)Also look at this interesting article.
http://www.answers.com/Q/How_do_you_measure_transom_height_for_an_outboard_motor
Good luck

 

[Rory]

if the props are working then just leave it as is and use them till they worn out the paint will come off all props at some time normally in a couple off hours the pitting you get is not great but not going to cause any proplems