Re: [Amel Yacht Owners] Re: Modified SM Bow Thruster

James Alton

From a maintenance point of view the sealed bearings and replacing the gear oil with grease sounds interesting.  Given that both the seals and the more viscous grease will increase the friction I am curious if there is a noticeable drop in RPM during use?   Has anyone measured the amperage increase after making this change?  If significant one might need to reduce slightly the max run time due to heating.  

James Alton
 SV Sueno, Maramu #220
Arbatax,  Italy

Sent from Samsung tablet.

-------- Original message --------
From: "Ian Shepherd sv_freespirit@... [amelyachtowners]" <amelyachtowners@...>
Date: 8/12/17 09:37 (GMT+01:00)
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Re: Modified SM Bow Thruster


Hello Paul,

you could but as you will be taking the thruster out, why not do the simple job of replacing the bearings with new sealed ones? They are not expensive. All you need is a puller to get them off and a tube to tap them back on if you don't have access to a press. You will find that the thruster will sound smother afterwards. Amel now use sealed bearings or so I have heard.

Regarding the play in your hub, please note that the stainless sleeve does not extend much beyond the lip seal. (See my photo in the photo's section), so the pin does not go through the sleeve. Sounds like you need to replace the hub. They do get sloppy after much use.

Good luck

Ian Shepherd SM2K 414 Crusader About to depart for Cyprus

On 11/08/2017 16:52, osterberg.paul.l@... [amelyachtowners] wrote:

Ian, very interesting 

Would it be possible and a good idea to use lithium grease even with opened ball bearings?
I changed my bearings last year, but will haul out soon, so to opens the gear boat and put in lithium grease would be a small and quick job

I have some play between the propeller  hub and the shaft so a steel bushing would solve that

Paul on SY Kerpa SM259 currently cruising Rhode Island 

Join { to automatically receive all group messages.