marine_products-electrical-exhaust_systems-largeIt had never been so obvious to me until the day I drove the new Cruisers Yachts 48 Cantius. I was out with Todd Trepanier, one of Cruisers Yachts top technicians. I was doing a boat review for Canadian Yachting and Todd was aboard because it was hull Number 1 and absolutely brand new, so he was adjusting things and running factory sea trials.

At dockside, we had the sunroof fully open and the glass aft bulkhead too. As we headed out into Lake Michigan, we accelerated up to high speed. It started to get windy and cool so we closed the glass aft bulkhead and the huge glass sunroof.

It was just like rolling up the window in your car at highway speed. Suddenly, everything was peaceful and quiet. In fact, the 48 Cantius turned out to be one of the quietest boats I have ever been in.

Many new powerboat designs feature Volvo Penta IPS or CMD MerCruiser Zeus pod drives. Both are installed back near the transom and use a through-hub exhaust. Engine noise exits into the water underneath the boat. By being so quiet, the 48 Cantius would be substantially more comfortable on a cruise than one where you hear the drone of the engine exhaust.

Almost any inboard powered boat, sail or power, would be more quiet and comfortable if it was fitted with mufflers. Luckily, mufflers for virtually any boat are available from such companies as Centek Industries, Custom Marine, Livorsi Marine and Vetus America.

Marine exhaust mufflers can be divided into two basic types: dry exhaust and wet exhaust. Wet exhaust has engine cooling water in the flow, cooling the exhaust significantly. Few pleasure craft use a dry exhaust. They are generally quite noisy and heat dissipation can be a safety issue. A diesel engine exhaust can be 600 degrees C exiting the engine. Best to cool that.

Many marine wet exhaust mufflers use fiberglass-reinforced plastics because this type of construction will not corrode or deteriorate when exposed to gasoline or diesel fumes mixed with salt or fresh water. Resistance to higher temperatures wards off warping or melting which has been a factor in some rubber or plastic mufflers.

Next, choosing a muffler for your boat starts with the following basic considerations.

1. Engine Location – Engines located at or below the loaded water line (LWL) require some type of a "lift" muffler to prevent cooling water from flowing back into the engine.

2. Exhaust System Size – Larger engines require larger diameter exhaust systems and more space. The parts must be large enough to carry the cooling water and gases through the system without creating back pressure in excess of the engine manufacturer's recommendations.

3. Noise Reduction – Muffler size and internal design will determine the amount of noise reduction achievable in a given installation. Larger mufflers deliver better silencing but space limitations may dictate the size and type of muffler that can be used.

Some underwater discharge systems can be retrofitted as long as sufficient space is available. For power boats with gasoline engines that now have wet exhaust running through the transom above the waterline, a simple exhaust tip might work, dropping sound levels but not horsepower. This winter, talk to your dealer or repair yard about a muffler system for your boat and get more enjoyment out of the people you take onboard!

Destinations

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Ah Canadian simplicity at its finest; small town, big marina. Little Hilton Beach (population ...
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In the 1920s, a small cove in Canoe Bay was used as a shipping point and safe-haven for rum runners ...
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The New Glasgow marina is located about six miles up the East River of Pictou in the heart of the ...
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Located about half way between Shediac and the Miramichi on New Brunswick’s Acadian Coast, the town ...
Suddenly the once forsaken city of Hamilton, Ontario is booming for at least two good reasons.
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CYOB Destinations: We Visit the Hilton Beach Marina

Hilton BeachBy Amelia Morris

Ah Canadian simplicity at its finest; small town, big marina. Little Hilton Beach (population 200!), which I am lucky enough to call my cottage country, is located on the north-east coast of St. Joseph Island. The Hilton Beach Marina is one of the largest and most major ports of call in the Western North Channel. It also has a long and rich history dating back to the 1850’s.

I spoke with Marina Manager, Laura McRae and got the full scoop on what goes on in this inconspicuous but busy marina.

Read more about Hilton Beach Marina....

 

 

 

Lifestyle

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On Thursday last week, at age 88, Bruce Kirby has been invested into the Order of Canada for his ...
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Whether he’s sailing celebrities around the BVI’s or sailing an Etchell back home at his native ...
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The first part of this blog will show that not every day is blue sky and sunshine in the Bahamas!
This beauty came our way from Reel Deal Yachts in Bahia Mar, Florida. Why not charter for the ...
This new legislation from Washington State Department of Fisheries applies to boats launched in ...

Boat Reviews

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Tactical Custom Boats announces the sale to a North American client of a custom Tactical 77’ – Fast ...
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The latest new model from Cruisers Yachts is the Cantius 42 and this yacht made its debut in the ...
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Jeanneau’s newest NC model is the NC 33, and it’s an exciting and innovative inboard cruiser ...
The Four Winns H290OB combines two of the most popular new big boat trends to come up with a great ...
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Scarab 255 Open

Scarab 255 OpenBy Andy Adams and John Armstrong

You can imagine,at the GroupeBeneteau dealer meeting in Michigan last fall where all the Four Winns, Scarab, Wellcraft, and Glastrondealers had come to see the latest new models, the docks were lined up with gleaming brand-new boats to show the dealers and media – and they certainly put on a show! But for me, the Scarab 255 Open was an immediate stand out. This is a boat that breaks new ground and brings fresh thinking and interpretation of the boating experience to a wide range of buyers.

We had a quick look around but the test drives would have to wait until the next day.

Read more about the Scarab 255 Open....

 

 

 

 

DIY & How to

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Nothing stops a vacation faster than a problem with the fresh water system – be it leaks, smells, ...
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In this time of boat show afterglow, many boaters are counting the days until launch. 
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