Broken Knotmeter

[Brad]

Hi, I have done a search and can't find any info on determining why my knotmeter is not working on my Catalina 27. I know there is power going to the unit and as my boat is moored I can't find out if it is a problem with the transducer. Where does the problem usually lie and should I chance just replacing the knotmeter and try it out with the transducer that is already there or could that just be throwing away money? Any advice would be appreciated. Thanks.

 

[Eric1803]

Got a snorkle and mask?

Paddle wheel knot meters often have to be cleaned of critters and other growth that prevents the wheel from turning. Eric

 

[Jack]

Manufacturer

Brad, My knotmeter broke on my 27. I found the manufacturer on the meter and looked then up online. I sent both peices to them by mail {the meter and the sender} they repair it for 100 bucks and everything looks and works like new. I like to keep things oringal and in working order on my boat and hope it will help with the resale value.  You should be able to disconnect the meter and {the hard part} unscrew the paddlewheel from inside the boat, pull it out and quickly put a plug in place, make sure you have the correct plug. After you do it a few times it's no big deal. Contact the oringal manufacturer for service. hope this helps, Jack

 

[David H]

What brand?

If it is a datamarine knotmeter, you can remove the sending unit from inside the boat. Be fast and have a plug ready as a 1 1/2" hole lets in a lot of water fast.

 

[Jim on Whiskey Girl, 1973 C-27]

Underwater critters

Here is a picture of the worms that I found 2 months after spraying Interlux Transducer anitfouling paint (at $19 a can *grr ) on the plug for my speed transducer. They will get into the corners and stop the little paddle wheel unless cleaned on a regular basis.

 

[Jim on Whiskey Girl, 1973 C-27]

Opps, no picture!

Sorry, picture didn't come through, will try again