Re: Placement of Beta 60 in an Amel Maramu #replacement
toggle quoted messageShow quoted text
Thank You Danny,
Thank you for the explanation.
I am headed off to St Maarten for a new Yanmar mid January.
It is working perfectly and all the fluid samples are great. However with over 7,000 hours, I thought I would just replace it and never have to worry about something going bang on a passage .
I was concerned about the possibility of breaking the oil pump, a wrist pin, or a connecting rod.
Kimberlite Amel Super Maramu #376
HAPPY New Year
From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Danny and Yvonne SIMMS
Sent: Thursday, December 31, 2020 3:28 PM
Subject: Re: [AmelYachtOwners] Placement of Beta 60 in an Amel Maramu #replacement
Hi Eric, it wasn't an hours issue. What caused its demise was the misunderstanding about rpm. It was maxing at 2800 rpm under load and the consensus on the forum was that there must be something wrong since under no load it would easily do 4000. Many of us tried to resolve what wasn't an issue. So when after about 2 years and 25000 sailing miles suddenly it would rev up to 3500 under load I thought it had resolved whatever was wrong. HOWEVER 2800rpm was the correct max under load and the ability to rev higher was caused by a jammed wastegate on the turbo. This is intended to open progressively to reduce the boost as revs increase. So with it jammed closed the boost pressure was excessive, hence the higher revs achieved. Not that I ran it at high revs a lot, but over several years the excess pressure damaged the rings and pistons and eventually I couldn't get better than 2200 rpm under load. I tried everything without success including quite a lot of Volvo specialist time. So one day, having had the engineer on board yet again I said b....it and ordered a new one. In retrospect it would have made more sense to do a recondition on the TMD22 since I had replaced most of the bolt ons.
So you TMD owners. 2800 load rpm is correct and if you are getting more, check the waste gate.
Happy New Year to you all