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Forum: Propellers & Drive Systems

30-12-2018, 15:19

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks again PeterS
This TMC60A gearbox has a male parallel spline on the output shaft.
The coupling slides on to this, it's OD being the sealing surface to the output shaft oil seal. The coupling...

Forum: Propellers & Drive Systems

30-12-2018, 12:49

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks PeterS,
Your reply very succinctly confirms reservations I had about fitting a bearing so close to the engine.
I have removed the coupling and all is back as before.
I think I will replace...

Forum: Propellers & Drive Systems

15-12-2018, 00:26

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Hi Capt Ben
The engine feet are only about 1/3 up the mount studs.

And Hi to NYsail; yes I think I've seen a pic of your installation on another thread.

Thanks

Forum: Propellers & Drive Systems

13-12-2018, 14:24

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

When I bought this boat 5 yrs ago it had a Volvo Penta MD11D in it.
When I retired and was going cruising full-time I thought it wise to replace the old seawater cooled Volvo, which was still...

Forum: Propellers & Drive Systems

13-12-2018, 00:36

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Hi,
The reason IS buried back there!
I hoped it would stop the recurring oil leak through the output shaft spline.
Oil in the bilge is a PIA.

Rgds

Forum: Propellers & Drive Systems

12-12-2018, 21:07

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks Coastalexplorer

I will look at fitting a cutlass brg in the front end of the stern tube (i've been calling this a shaft log; it is just a bronze tube; about 2 or 3mm wall thickness: I...

Forum: Propellers & Drive Systems

12-12-2018, 15:00

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks DougR,
I think you have hit the nail on the head probably.
The flex coupling was supplied new with the engine/gearbox.
Beta say a flexible coupling "is strongly recommended in almost every...

Forum: Propellers & Drive Systems

12-12-2018, 05:42

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks Uncle Bob; a bit out of left field!
BUT I asked an "engineer" a couple of years ago "how is it that I've never had to change the cutlass bearing in all this time yet I hear often of people...

Forum: Propellers & Drive Systems

11-12-2018, 12:35

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

And thanks JPA Cate

Yes the cutlass must be considered and indeed I have had this boat 15 years and never changed it; I haul out every year and it is checked, usually by an expert, sometimes by...

Forum: Propellers & Drive Systems

11-12-2018, 12:28

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Re: Prop rattle after fitting flexible coupling.

Thanks Misfit; I suppose there are people out there who would do this sort of work without checking the alignment but in this case, measuring between the cone headed bolt supplied with the coupling...

Forum: Propellers & Drive Systems

11-12-2018, 11:30

Replies: 23

Prop rattle after fitting flexible coupling.

Views: 3,996

Posted By Draughty

Prop rattle after fitting flexible coupling.

Hi all,

I recently fitted an R&D flexible coupling which has reduced NVH up to about 1900rpm but above that quite a nasty rattle/knock sets in from the prop/cutlass area when under way. With the...

Showing results 1 to 11 of 11

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