Danny and Yvonne SIMMS
Hi Colin, yes I had the same problem, identified before the boat went back in the water three years ago. I applied a fix I used with some agricultural machinery with great success over many years. Mix the oil 50/50 with a compatable grease, end of problem. It is lubricating the bevel gears at the bottom so they are well coated and when it is in use warmth from the action softens the grease/oil mixture and ensures good lubrication. I just changed the oil a month ago, all there and no water in it.
While I am on the topic of grease. Some time ago I posted about fitting grease nipples to the outhaul and furler gearboxes. Just openned one up to see how it was. Full of wonderfully clean grease in good condition.
SM299 Ocean Pearl
From: Colin Streeter <email@example.com>
Sent: Friday, 4 May 2012 8:18 PM
Subject: Re: [Amel] Re: Bowthruster oil - how to oil top up? - quick question
Many thanks for all the advice. Yes, Island Pearl II is on the hard stand
having her anti-foul painting done so we used this opportunity to service
the bowthruster. We dropped the thruster unit out after the recent advice
as we discovered that this is a relatively easy process to do on the hard.
Unfortunately after changing the oil seal behind the bowthruster propeller
we found oil oozing out of the centre edge of new Amel supplied rubber seal
where it spins around the little plastic bearing shaft. We changed the
bearing rubber seal twice today, (a new one each time) and re-filled the
oil each time but unfortunately the leak remained. On the first attempt we
put the rubber seal in with the opening side with small stainless steel
spring facing outwards. Since this did not work we cleaned it all down
again and put the rubber seal in the other way around with the spring and
opening side facing inwards. Unfortunately the SAE90 gear oil continued to
ooze out the area in the centre where the rubber seals turn around the
plastic propeller shaft.
I now suspect that the problem could be that the little plastic shaft which
turns the prop could have a small amount of pitting in it, or scratches,
which results in small amounts of oil coming out as the shaft turns?
My 3 questions therefore are:
1) Has anyone else had such a problem, ie. oil leaks from the bottom
bearing after renewing the rubber seal? If so, how did you fix it?
2) Is it normal for a small amount of oil to ooze out of this bottom
bearing? - and if so does it stop leaking when underwater due to a
balancing force on it from the water?
3) Should the rubber seal go on with opening and spring facing inwards or
Island Pearl II - SM2k #332
On Fri, May 4, 2012 at 4:03 AM, Ian & Judy Jenkins <
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