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[Amel] Re: Volvo Penta TMD22 Low RPM

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  • islandbwoy4434
    While replacing the turbo on Libby (as noted lees than 2 hours on it) the exhaust elbow was removed, inspected and cleaned. Light Carbon deposits were removed
    Message 1 of 59 , Jul 1 5:18 AM
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      While replacing the turbo on Libby (as noted lees than 2 hours on it) the exhaust elbow was removed, inspected and cleaned. Light Carbon deposits were removed with a dremel tool. It was in fair condition and I chose to re-use as a replacement part was $850.00US (in San Diego) I may at some point see if a SS one can be fabricated locally.
      Terry&Dena
      SV Libby SM196
      San Diego

      --- In amelyachtowners@yahoogroups.com, "Anne and John Hollamby " <annejohnholl@...> wrote:
      >
      > Hi Danny, For what it is worth my last boat had a Volvo engine and needed a new mixing elbow when we were in Queensland. The cost of importing one was very high and a local welding business made a new one out of stainless for much less and much quicker.
      > Regards, Anne and John, Bali Hai, SM 319 Malta
      >
      > From: Danny and Yvonne SIMMS
      > Sent: Saturday, June 29, 2013 10:37 PM
      > To: amel owners
      > Subject: Fw: [Amel] Re: Volvo Penta TMD22 Low RPM
      >
      >
      > Sorry guys (and Gals)
      > error in last message. Correction is: The mixing elbow is beside the turbo that is covered with the heat protector, (the elbow itself is not covered)
      > Regards
      > Danny
      > SM299 Ocean Pearl
      >
      > ----- Forwarded Message -----
      > From: Danny and Yvonne SIMMS <mailto:simms%40xtra.co.nz>
      > To: "mailto:amelyachtowners%40yahoogroups.com" <mailto:amelyachtowners%40yahoogroups.com>
      > Sent: Sunday, 30 June 2013 8:24 AM
      > Subject: Re: [Amel] Re: Volvo Penta TMD22 Low RPM
      >
      >
      > Hi Again.
      > I do commend to the group to check the exhaust mixing elbow I mentioned for carbon build up. It is relatively easy to remove but take it off the boat to clean the carbon out. You may well find as I did that the casting has eroded to the extent of needing to be replaced. If you are wondering where and what the "mixing elbow" is, it is beside the turbo and is covered with the heat protector. Its purpose in life is to be the entry point to the exhaust system of the cooling water. As I said before this mixing of hot gas and much cooler water causes carbon deposit that can eventually block the exhuast completely, however even any reduction in the volume of this can reduce engine performance significantly so periodic cleaning is beneficial.
      > Regards
      > Danny
      > SM 299
      > Ocean Pearl
      >
      > ________________________________
      > From: Joel F Potter <mailto:jfpottercys%40att.net>
      > To: mailto:amelyachtowners%40yahoogroups.com
      > Sent: Friday, 28 June 2013 10:51 AM
      > Subject: RE: [Amel] Re: Volvo Penta TMD22 Low RPM
      >
      >
      > Hello Danny and the propeller problems with fouling and wear and RPM reductions are not exclusive to the Volvo engine installation (and the Perkins Prima which is virtually the same engine). I had a Volvo equipped boat as my first demonstration boat, and then two Yanmar boats that I purchased in succession for use as demonstrators. The Yanmar boats did exactly the same thing with even one gooseneck barnacle on the Autoprop. That, and the fact that I have sold at least 70 used SM 53’s over the years and prepared for every sea trial with a prop inspection and/or cleaning to make sure that proper performance could be demonstrated. The Autoprop is a fine device if it is clean but they have a real Jekell-Hyde character change when dirty.
      >
      > Your comments on usage and carbon and so forth are right on the money. I have sold boats with 700 hours on the diesel where the motor was never run past about 60% of maximum output. Of course these were smoky and well down on power to the 7000 hour example that was run flat stick frequently and always attempted to be kept in the 75%-90% power range and with otherwise exemplary maintenance. Diesels like to work and protest if they are made to loaf…
      >
      > I always smile when I see that you are out and about enjoying your Amel the way God and Henri intended. You are a fortunate guy!
      >
      > All the best,
      >
      > Joel
      >
      > Joel F. Potter - Cruising Yacht Specialist, LLC
      >
      > Amel's Sole Associate for the Americas
      >
      > Mailing Address: 401 East Las Olas Boulevard #130-126
      >
      > Fort Lauderdale, Florida 33301
      >
      > Phone: (954) 462-5869 Cell: (954) 812-2485
      >
      > Email: mailto:jfpottercys%40att.net
      >
      > From: mailto:amelyachtowners%40yahoogroups.com [mailto:mailto:amelyachtowners%40yahoogroups.com] On Behalf Of Danny and Yvonne SIMMS
      > Sent: Wednesday, June 26, 2013 7:16 AM
      > To: mailto:amelyachtowners%40yahoogroups.com
      > Subject: Re: [Amel] Re: Volvo Penta TMD22 Low RPM
      >
      > Hi All,
      > It is of note that the problem is exclusive to the TMD 22. If it is a prop problem it beggars belief that no Yanmar equipped boats have trouble with their props. Surely all Yanmar owners do not do a so much better job of keeping any fouling off their propellers?
      >
      > Also, as I understand the auto prop it automatically adjusts pitch to match power, and torque applied, the load, and boat speed. So the pitch would be different in a fully laden boat with all cruising gear on board, and 600l diesel and 1000 l of water and six persons and luggage aboard, pushing into 20 knots of wind and a chop, compared to an empty boat in flat water with no opposing wind. I would expect the fully laden boat to operate with a lesser pitch to allow revs to be attained, like changing down gears in a car going up a steep hill.
      >
      > Likewise, if two identical boats, identically laden in identical circumstances, had different diameter propellers, would not the auto prop automatically compensate for this by applying a lesser pitch to the larger prop? It would do this on the boats with the 100hp engines running at less than full power would they not?.
      >
      > I believe we may find different owners (or past owners) habitual usage of their motors over long periods may well be a factor.. Diesel engines like to work, and work for long periods of time, to get good and hot and burn off accumulated carbon deposits.
      >
      > Speaking of Carbon deposits. There is a cast iron casting at the end of the exhaust manifold.. This is where the cooling water enters the exhaust system. It is a common problem across all engine types for large amounts of carbon the build up here, to the extent it can completely clog the exhaust. It is caused by the change in temperature as the water meets the VERY HOT exhaust gases. Twice recently I have heard of engines actually being stopped by this, one was a Kubota diving a gen set on an Amel, the other was a small Yanmar in a 30 footer. The owner of the Yanmar, a quite skilled home mechanic, had gone to the extent of removing the motor and completely disasembling it before he found the inaccessible exhaust almost completely clogged where the water and hot gasses met.
      > Food for thought,
      > Regards
      > Danny
      > SM 299 Ocean Pearl
      > Currently Cruising Fiji
      >
      > ________________________________
      > From: Miles Bidwell <mailto:mbidwell%40attglobal.net>
      > To: mailto:amelyachtowners%40yahoogroups.com <mailto:amelyachtowners%40yahoogroups.com>
      > Sent: Monday, 24 June 2013 8:35 AM
      > Subject: [Amel] Re: Volvo Penta TMD22 Low RPM
      >
      > I have recently been having the same problem with my TMD22. I cannot get
      > more than about 1700 rpms, but if I stop and then flat stick the throttle,
      > the autoprop will spin up into the turbo range and then I have (what seems
      > to be) almost normal power until I let the rpms drop below 2100. The
      > maximum revs are 2700 instead of the normal 2800 as of last summer; however
      > the big problem is new this year. Over the winter, I had the fresh water
      > pump replaced and the injectors checked and adjusted and the turbo replaced.
      > The autoprop is clean and to make sure, the autoprop people just rebuilt it.
      > A fixed prop does not solve the issue. I am about to turn to the high
      > pressure fuel pump. Any suggestions will be most welcome.
      >
      > Miles, S/Y Ladybug (SM 216) in Newport, RI
      >
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    • Anne and John Hollamby
      Hello Miles, A week or two ago I removed the forward cover plate on the fuel tank and inserted a copper pipe two metres long with a short piece of plastic tube
      Message 59 of 59 , Sep 3, 2013
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        Hello Miles,
        A week or two ago I removed the forward cover plate on the fuel tank and inserted a copper pipe two metres long with a short piece of plastic tube on the end. The pipe was straight apart from a gentle bend about 30 cms from the end so that when it passed through the hole in the baffle it could be moved to reach the bottom of the tank near the outlet. I then connected the pipe with a plastic tube to an electric pump and filled 7 litre clear plastic bottles with fuel. The object of this was to remove any condensation that might be present. The polythene tube connecting the pump had a slight kink at the join and this became blocked with what locked and felt like a small bit of soft black sealant. After leaving the bottles to settle for several days there was no sign of water but they all had a bit of fine black stuff at the bottom (fine because it had been through the pump).I poured most of the clean fuel back into the tank.

        Regards, Anne and John, Bali Hai, SM319, Siracusa Sicily

        From: Miles Bidwell
        Sent: Friday, August 30, 2013 3:57 PM
        To: amelyachtowners@yahoogroups.com
        Subject: [Amel] Re: Volvo Penta TMD22 Low RPM


        Thanks to everyone for your concern and advice. Yesterday the mechanic
        replaced the racor and the fuel lines and this fixed the problem. I have my
        boat back after several months of anguish. Now the problem is to find out
        why fuel lines the are sitting under 160 gallons of fuel should have
        negative pressure-maybe a clog in the bottom of the fuel tank or the copper
        line to the racor? This is not difficult to find and fix and in the
        meantime the boat runs up smoothly to 2800 all the time.

        Miles (SM 216, Ladybug, Newport, RI)

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