altGetting the owner of an older sailboat to spend the money on a brand new diesel auxiliary is a challenge for many marine service businesses. Often the costs involved in the purchase and installation of a new powerplant carries a bill that can make most recreational boaters blush and run away. Some vessels, however, are built for the long haul and replacing the diesel engine on an otherwise sound mechanical vessel can extend the life of the boat at a fraction of the cost of the replacement of the entire boat. Newer marine diesels are also more fuel efficient, smoother, quieter, lighter, and pack far more horsepower into smaller packages.

A boat designed for offshore passagemaking shouldn’t rely on a rusty old clunker engine to transit the ocean blue and that was just the case when John Nassichuk of Raven Marine in North Vancouver, BC was tasked with installing a new power plant into “Northern Dancer” a 43’ Hans Christian ketch. The boat’s 25+ year old Nissan diesel had served the boat admirably, but the owners wanted to do more long-distance cruising and needed dependable power. As an authorized Yanmar installer and service center, John recommended the 4-cylinder Yanmar 4JH-4-TE for the job citing a smooth-running, rubber-mounted engine would efficiently drive the heavy hull form of the Hans Christian. Due to the full keel design of the vessel, the boat had an extremely long propeller shaft that extended from the diesel amidships all the way aft to a propeller aperture at the trailing edge of the keel. Supporting the shaft was a cutlass bearing aft and a rigid pillow block several feet aft of the gearbox.

Since the original Nissan diesel was solid-mounted to the hull and the new Yanmar unit was mounted on flexible mounts, there were concerns about being able to support the industrial style prop shaft where it coupled to the new gearbox. Additionally, Yanmar stressed the use of Yanmar’s flexible motor mounts when repowering to validate the warranty of the motor. To provide adequate prop shaft support, the rigid mount pillow block bearing would need to remain in place, but how then to properly align the shaft to the rubber mounted transmission? The solution came in the form of a free floating Powertrain CV joint coupler distributed by Thermoboat in Sydney, BC. The coupler was bolted inline aft of the gearbox and provided support to the shaft without the need of building a separate bulkhead mounted CV joint.

“This was a far more economical solution,” says Nassichuck. “Building a bulkhead and then mounting a rigid CV Joint to support the shaft was going to be really expensive. This worked out great.”

When asked if there were any drawbacks to the Thermoboat Powertrain Coupler compared to a conventional shaft coupler, John made sure to stress the importance of making precise measurements when cutting or fabricating the prop shaft. “A standard 5” rubber coupler gives you a few inches of leeway when doing a shaft install. The Powertrain coupler is so small and compact, you have to measure out the shaft just right.”

Available in three sizes, the self-aligning Powertrain Coupler is designed to withstand the torque loads of engines in excess of 700 HP and can allow for up to 8 degrees of shaft deflection without requiring a supporting bulkhead mount. Once the prop shaft was properly cut and the new diesel lowered into place, it took just a few hours to finish hooking up the shaft and tightening the remaining bolts throughout the diesel. While this installation was done as part of a repower project, Nassichuk estimates that installing the coupler on diesels already in the boat would likely take far fewer hours than if a bulkhead coupler was utilized. Also John noted that the coupler comes pre-lubricated from the factory and requires little or no maintenance during the life of the powertrain.

With a new diesel in place and the prop shaft hooked up, the Northern Dancer’s owners took off on their first cruise in years without worrying if the engine would give up on them when they needed it most. And while a new power plant wasn’t the least expensive modification they’d ever done to the boat, it was one of the best values when it came to peace of mind and reliability.

www.thermoboat.com

By Chuck Gilchrest

Destinations

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Following the harsh impact of Hurricanes Irma and Maria, The British Virgin Islands is making an ...
For the adventurous boater Bunsby Marine Provincial Park is a special place, situated due south of ...
There is good anchoring in Cowichan Bay and nearby, and salt water enough to make any boater happy. ...
We’re gliding through green-blue waters, colours so vivid and bright they hurt your eyes. We’re set ...
The Halifax waterfront has been attracting more and more large yachts in recent years. However, a ...
Ah Canadian simplicity at its finest; small town, big marina. Little Hilton Beach (population ...
Vancouver-based Big Blue Yacht Charters Worldwide owner Emma Murdoch explains that luxury crewed ...
In the 1920s, a small cove in Canoe Bay was used as a shipping point and safe-haven for rum runners ...
Here’s an update from Caroline Swann with some news for the adventurous types who may be heading to ...
The New Glasgow marina is located about six miles up the East River of Pictou in the heart of the ...

Thornbury on Georgian BayJennifer Harker

To borrow a line from Monty Python, “and now, for something completely different”.

Normally, our boating adventures are spent weaving our way amongst the picturesque backdrop of the 30,000 Islands of eastern Georgian Bay aboard our Sea Ray Sundancer 268. This time we’ve traded power for sail as friends welcome us aboard their 38-foot Irwin for the Canada Day long weekend.

We’ve set our sights on a decidedly different destination for this journey, charting a course for Thornbury. This small town, located in the southern reaches of Nottawasaga Bay, is an oft-overlooked area of Georgian Bay - but it shouldn’t be. Although we’ve explored this shoreline on countless road trips, this will be our first visit from the waterside.

Read more about the Thornbury on Georgian Bay...

 

Lifestyle

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My husband and I were visiting the Bra d'Or Lake from Newfoundland in our 39 foot Sea Ray ...
After an autumn in Canada, we arrived back in northern Florida at Adamant 1 on January 3rd and with ...
This issue, to kick off 2019, we have an unofficial Photo of the week and this, the unofficial ...
Readers give us a bit of feedback on the 60th anniversary of the Shark 24
We are home for Christmas this year. Soon we will be heading back to Adamant 1 for another winter ...
This past October we drove to Telegraph Cove with friends and spent a day of wonder cruising the ...
We have kept our subscription to Canadian Yacht Onboard as we have traveled the South Pacific over ...
Stuart Walker a legend in competitive sailing passed away on November 12, 2018 in Annapolis. Stuart ...
“In Grenada, we had about 80 cruiser kids visit our boat...by dinghy of course! Sometimes you ...
Austin Edwards told students and parents at the Saanich School’s “Parents as Informed Partners” ...

Boat Reviews

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I have heard a lot of talk lately about trends in yacht clubs where senior membership is getting ...
To get you in the mood for cruising the Boat Show then launching in spring, here’s a boat that ...
Quite simply, the styles of boats have changed. Where in past years a buyer might have been looking ...
At the boat shows, the Ranger Tugs’ classic tugboat lines always grab the crowds, with the wives ...
Sometimes a great idea requires an encore, and French yacht builder Jeanneau got that with the ...
Tactical Custom Boats announces the sale to a North American client of a custom Tactical 77’ – Fast ...
Bruce Elliott is an inventor. And when he sold the technology he developed to build utility poles ...
One often asks of a winning achievement or a fabulous design, could it have possibly been done ...
The latest new model from Cruisers Yachts is the Cantius 42 and this yacht made its debut in the ...
The Sabre 45 Salon Express is new for 2017, making its debut at the Fort Lauderdale International ...

Cruisers Yachts Cantius 46The Cantius 46 is the latest evolution of Cruisers Yachts’ Cantius line – now there are five models from 42 to 60 feet. The new Cantius 46 is a great example of “easy boating” the way Volvo Penta imagined it and how Cruisers Yachts has executed it. The idea is that you just come on board, unlock the glass doors, fire it up, cast off, and enjoy - alone, with a spouse, or with a huge group.

Since the first Cantius model was introduced, Cruisers Yachts has continued to refine the concept for ever-greater convenience, more clever and innovative features, and also greater performance.

Read more about the Cantius 46...

 

 

 

 

Sun Odyssey 410By, Zuzana Prochazka

The revolution continues – with a twist

The Jeanneau 410 is the eighth generation of the Sun Odyssey line, but even with that long history and umpteen years of tweaks and iterations, what the French builder has done in the latest revamp will make you say, “Wait, what?”

 Last year, Jeanneau turned the sailboat deck layout on its ear with the introduction of their Sun Odyssey 490 and 440, and the concept of the ‘walk-around deck’.

Read More about the Odyssey 410...

 

 

 

Marine Products

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You most likely operate your vessel with batteries that are rechargeable. Rechargeable batteries ...
This past decade has been a real up-and-down ride for the companies who make boating equipment. ...
Making it’s global debut at the Toronto International Boat Show the new Mercury 5hp Propane ...
Most of us have heard of fuel additives, whether it be for gasoline or diesel. But which one to ...
While the basics of boat hull design hasn’t changed that much over the years, the same cannot be ...
Yamaha targets the Canadian big-water market with its high-torque 425 horsepower V8 XTO outboard, ...
Looking for a great Christmas gift for the Offshore sailor on your list? This being a Marblehead to ...
Sail shape is long gone. They have stained, feels thin and you see broken threads everywhere. Your ...
Stripping the antifouling paint from the bottom of a boat is physically demanding and is one of the ...
The 2019 Ultimate Sailing Calendar highlights the drama and excitement of blue-water sailing, as ...