Muffler Replacement


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We had a long list of projects to complete during our Southampton haulout at Saxon Wharf. One of the bigger jobs was to replace the muffler. Our old one turned out to not be in bad shape, and might have gone a few more years. But we couldn’t really know the state of the muffler until the cladding had been removed and we’ve seen enough Nordhavn 47s with mufflers failing around ten years that we wanted to get it changed just in case. A failed muffler can damage in-stack navigational system wiring and make a real mess.

Below are are highlights from January 9th through 24th, 2018 at Saxon Wharf, Southampton, UK. Click any image for a larger view, or click the position to view the location on a map. And a live map of our current route and most recent log entries always is available at mvdirona.com/maps

1/9/2018
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Nordhavn Europe

Anthony “Biscuit” Bisset striking a pose while Yannick Thompson looks on as the two work on removing our muffler for replacement. Yann does commissioning and after sales for Nordhavn Europe and Biscuit was formerly a commissioning engineer with them who is often contracted for service jobs.
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Accessing Muffler

In order to remove the muffler, the enclosure we installed in Palm Beach first had to be removed.
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Debris Catcher

Biscuit installing bags around the exhaust in the engine room to catch the rust flakes and other debris that will fall out from above as the muffler is removed. Seen below, Proteum is disconnecting the propellor shaft coupling from the transmission.
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Stack

The stack with all the vent grills and hatches removed.
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Looking down

Looking down into the exhaust stack from the boat deck.
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Looking up

Looking up to the top of the stack. The silver cladding visible in the earlier picture has been removed from the exhaust—we’ll have that replaced while we’re here.
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Unbolting Exhaust

Biscuit unbolting the muffler from within the stack at the boat deck.
1/10/2018
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Muffler Removal

Biscuit on the left and Yann on the right of Nordhavn Europe getting ready to remove the muffler.
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Muffler Out

The muffler partially slid out of the stack enclosure.
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Lowering Muffler

Neil Russell, Director of Nordhavn Europe, guiding the old muffler off the boat from the ground with Yann, Biscuit and Jack on deck.
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Spur Cutter

James holding the spur cutter and talking with Roland Mcildowie and Neil Russel. We’ll need to replace part of the Spur line cutters since an overzealous diver stripped the threads on the zinc attachment. Crated in the trailer behind is our prop shaft, with our old muffler beside it.
1/11/2018
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Exhaust Lagging

James discussing the plan for replacing the exhaust lagging from the boat deck to the top of the stack. Before leaving Seattle in 2012, we replaced all of the lagging in the engine room.
1/12/2018
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Muffler

Nordhavn Europe raising our new muffler up to the boat deck. Our old one wasn’t in bad shape, and might have gone a few more years, but we couldn’t really know the state of the muffler until the cladding had been removed and we’ve seen enough Nordhavn 47s with mufflers failing around ten years that we wanted to get it changed just in case. A failed muffler can damage in-stack navigational system wiring and make a real mess.
1/19/2018
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Muffler bottom

The bottom portion of our new muffler at the stack base.
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Muffler top

Looking down the stack from the top of the new muffler.
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Exhaust

The exhaust pipe heading up the stack. This is the original—we only replaced the muffler.
1/24/2018
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Exhaust Lagging

The new exhaust lagging being installed.
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Lagging on Muffler

The new lagging on the muffler looks excellent.
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Lagging on Exhaust

Looking up the stack to the exhaust covered in the new lagging.

Show locations on map Click the travel log icon on the left to see these locations on a map, with the complete log of our cruise.

On the map page, clicking on a camera or text icon will display a picture and/or log entry for that location, and clicking on the smaller icons along the route will display latitude, longitude and other navigation data for that location. And a live map of our current route and most recent log entries always is available at mvdirona.com/maps.

 
 


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2 comments on “Muffler Replacement
  1. Mark Rutter says:

    As usual, I am very grateful for the two of you sharing your adventures with us. I can’t wait to splash my Sea Ray 52 Sedan Bridge after a long winter stored in Hollan Michigan. But could wait to pay the invoice for my maintance and improvements.
    Which raised a question with me for Dirona…..how much do you spend annually for your trips and if you just travelled like I do around the Great Lakes ( week at a time)what would the difference be?
    Mark (Full Circle)

    • We live on the boat year around so it’s super hard to separate what it costs to live in London or wherever we happen to be from what it actually costs to do boating trips every year.

      I hope your yard work was done well and the price is reasonable.

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