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Barking Dog
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237 Posts
Are they Datamarine Instruments? Do an Internet search for them and you will get a phone number and email address for service. All I have ever seen on non-upgraded Catalina 30's are these. If they are Datamarine, they will give you the best answer.
 

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Senior Member
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19,485 Posts
Anybody know the size of the knotmeter and depth sounder transducer thru-hulls on a mid-80s Catalina 30? Thanks.
Wouldn't that depend more on the instrument provider than the boat design itself???

I'd check the literature of the instrument manufacturer.
 

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Detachable member
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377 Posts
i just replaced mine last year. i installed a garmin 010-10194-01. i just tried to look it up but it doesn't give the size. i'm almost positive it is 1.5". i have a '78
 
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