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-   -   Banging, clunking and thumping. Driveline problem 496/Bravo (https://www.offshoreonly.com/forums/general-boating-discussion/350905-banging-clunking-thumping-driveline-problem-496-bravo.html)

minxguy 11-24-2017 09:03 AM

Johnson rods on a Mercury, who would of thought...

Ken

Powerquest230 11-24-2017 11:22 AM

I’m in awe of the Cajones to power thru the clunking /thumping noise that started at low rpm. 😀

class6 11-24-2017 11:39 AM

Sometimes it makes it easier to find in the end

hotrodford 11-24-2017 03:46 PM

must be a hell of a swimmer / no great white sharks

rak rua 11-24-2017 07:04 PM


Originally Posted by minxguy (Post 4595638)
Johnson rods on a Mercury, who would of thought...

Ken

Damn auto spell, it should have read 'jonsson'........... :)

rak rua 11-24-2017 07:20 PM


Originally Posted by Powerquest230 (Post 4595659)
I’m in awe of the Cajones to power thru the clunking /thumping noise that started at low rpm. 😀

I did confess it was either a brave or stupid move!
When I first got her up on the plane, there was only a slight noise which disappeared completely once on the plane. I actually ran it all the way to wot 4,900 rpm's, for a couple of minutes and it sounded sweet. Backed her off and then getting back on the plane, I could hear the noise again, perhaps a little worse, so I headed home. She ran beautifully at 3500-4000. Just cruising, so I was on level trim and a straight line to the marina.

Approaching the marina, I slowed down and the noise was getting worse so I tied her up, scratched my head and called it a day. Aussies are good swimmers anyway but I my wallet may have needed a life jacket.

RR

rak rua 12-03-2017 09:14 PM

2 Attachment(s)
Service guys arrived on time, checked oil.....OK, so it's off with the drive.......

rak rua 12-03-2017 09:24 PM

4 Attachment(s)
Uni-joint and yoke appears OK but even I knew something was wrong when I saw these little round things lying on their backs inside, in a puddle of water......

Gimbal bearing has died due to a small split in the bellows. They're coming back later today with more tools to remove the gimbal bearing. Meanwhile, the drive is going back to their workshop to give it a thorough checking.

Im not overly impressed 'cos when they serviced everything a few months ago, I asked them to check anything that could be worn/damaged and that should include the bellows. Oh well, could be worse...... ;)

RR

Wobble 12-03-2017 09:37 PM

Your coupler could be the worse for wear after that failure, make sure they check it carefully.

rak rua 12-04-2017 03:40 AM

4 Attachment(s)
Dropped back this avo' and they have removed the remains of the old bearing. I haven't spoken to the technicians yet but it all looks pretty normal to me............ Thais tend to fix the immediate problem and not always investigate further and I don't know enough to argue about it. They said they doubt there's any further damage so I pretty much have to go with what they say. :silenced:

I felt like a marine proctologist taking graphic photos here.........

RR

P.S. Top right of the 2nd photo, is that a rusted bolt head or just some rusty water and grease?


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