What locking nut to use!

[Dazzler44]

I have a colvic Watson 23.5 with a 1500 BMC engine, and I have no propeller currently as it fell off. After some time and being finally lifted the measurements for prop shaft are 25mm with a 1:10 taper. The keyway is 6mm. And I’ve got a 14”x13” prop to fit but I seem to get confused with the locking nut size. Can anyone help please. Many thanks.

 

[scottie]

If you take notice of and do what you are advised then it will save a lot of repetition

 

[Dazzler44]

If you take notice of and do what you are advised then it will save a lot of repetition

Thanks

 

[Dazzler44]

If you take notice of and do what you are advised then it will save a lot of repetition

My point with this thread is that the measurements I provided last time were vague and incorrect. The measurements I have just provided are accurate and I have provided more information! I’m not trying to be repetitive in all fairness, I just want to get my boat running properly and thought that a boating forum MAY be able to help me. But thank you for your speedy reply.

 

[john_morris_uk]

Welcome to the forums and I’m sure someone will be along shortly who will give you accurate advice. There are some very knowledgable here who are usually only too happy to help.

 

[ChromeDome]

Isn't this thread a rewrite of
Propeller nut set sizes

by the same OP?

Anyhow: The type of prop normally takes a specific lock nut, locking washer or pin. The prop supplier will know.


If not you can choose. E.g. nylock.

 

[Dazzler44]

Welcome to the forums and I’m sure someone will be along shortly who will give you accurate advice. There are some very knowledgable here who are usually only too happy to help.

Thank you very much.

 

[colhel]

The best way forward is to measure the thread diameter with calipers. Post the results here and we can tell you half of what you need. We then have to decipher the pitch, we can possibly do this with a rule or tape measure and counting the threads along a given length. Where is the boat?

 

[Dazzler44]

Worked it out myself. Was m16 metric fine. Thanks. It’s in goole Colhel

 

[Dazzler44]

The best way forward is to measure the thread diameter with calipers. Post the results here and we can tell you half of what you need. We then have to decipher the pitch, we can possibly do this with a rule or tape measure and counting the threads along a given length. Where is the boat?

Thanks mate. Think I’ve sorted it. Boats in goole mate.