Raymarine wind speed slowing down

I was told that the ST60 masthead unit would fit BUT it produces a different voltage signal or something along those lines and the ST50 instrument cannot be calibrated to read the ST60 masthead properly - ie the windspeed over or under reads, sorry cant remember which!!
 
I was told that the ST60 masthead unit would fit BUT it produces a different voltage signal or something along those lines and the ST50 instrument cannot be calibrated to read the ST60 masthead properly - ie the windspeed over or under reads, sorry cant remember which!!

Interesting. Who said that?

Raymarine service FAQ at http://www.raymarine.com/knowledgebase/index.cfm?view=4315
says:


Also, is the ST-60 Masthead Unit interchangeable with the ST-50 (I'm having some difficulty locating a ST-50 Masthead Unit)?


The part number for a replacement masthead unit is: D168.

The ST60 masthead unit is the same as the ST50 one.
 
Interesting. Who said that?

Raymarine service FAQ at http://www.raymarine.com/knowledgebase/index.cfm?view=4315
says:


Also, is the ST-60 Masthead Unit interchangeable with the ST-50 (I'm having some difficulty locating a ST-50 Masthead Unit)?


The part number for a replacement masthead unit is: D168.

The ST60 masthead unit is the same as the ST50 one.

The ST60 and the ST50 MHU's certainly look different, the 60 is egg shaped and the 50 is cylindrical.
I was told a few years ago by a Raymarine dealer that new ST50 pods were no longer obtainable.
I've also seen somewhere that the design of the ST60 cups result in faster rotation. The ST60 system user manual in fact specifies a default calibration factor of 0.7 to allow for this. If the MHU was coupled to an ST50 display, it would over-read AFAIK.
The ST50 display cannot be calibrated.
 
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Look on the bright side, if you leave it, it will seem your boat is sailing faster in lighter airs!

Kidding , this is a great post, all I would add is that we bought our bearings (replacements) from simplybearings.co.uk very good selection of metric and imperial bearings...
 
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