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

Lifestyle

  • Prev
Congratulations to everyone who sent along a wonderful Canada Day photo. Fabulous photos and what a ...
My name is Alexandrine GOVAN, mother of a 5 years old girl and I found your contact on internet. ...
John Booth, who passed away just a few weeks ago was one of the most amazingly gifted and ...
We left Vero Beach on Saturday morning with Alicia, a boat from Sweden, following close behind. The ...
At the end of last month, Canadian sailors gathered on the Palma Beach in Palma de Mallorca, Spain ...
In 2019, C-TOW celebrates its 35th anniversary of providing 24/7 “Peace of Mind Boating” for ...
West Vancouver Yacht Club reports that following an independent certification process the Georgia ...
It has been hot in the Abacos this winter. Whoever said this area was cool this time of year must ...
Unfortunately this is not a picture from a boat but was taken on the evening of February 27, 2019 ...
On March 1, Tom Ramshaw of Stoney Lake Yacht Club was honoured with the most prestigious National ...

Boat Reviews

  • Prev
The Canadian Yachting test crew last week had the opportunity to run the Bavaria S36 HT at St ...
ILCA is seeking new builders to complement its existing network of manufacturers, the International ...
Nelson Gilbert (1854-1921) began building canoes in Brockville in the 1890s, a time when the sport ...
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 ...

Four WInns HD 180By Andy Adams

The Four Winns HD 180 is the kind of family boat I love to drive and enjoy. It’s very approachable, even for less experienced drivers and the accommodations and scale are like a comfortable family car or SUV. It all feels familiar and part of that is the Volvo Penta V6 200 SX stern drive. The engine is inboard; built into the boat and unobtrusive in use.

That is unless you shove the throttles open. Then the performance side of the Volvo Penta V6 200 appears with instant throttle response, partly a result of the variable valve timing and partly because of the direct injection system. 

Read more about the Four WInns HD 180.......

 

ILCA DinghyAustin, Texas, USA (25 April 2019) – In the wake of last month’s termination of its contract with its European builder, the International Laser Class Association (ILCA) announced today that, from 25 April 2019, all new, class-approved boats will be sold and raced under the “ILCA Dinghy” name. This change will have no impact on existing ILCA-authorized boats and equipment, which will be able to race alongside ILCA Dinghies in all class sanctioned events.


“It’s a big change for a racing class that hasn’t seen anything like this in our almost 50- year history,” said Class President Tracy Usher.

Read More about the ILCA Dinghy............

Destinations

  • Prev
NW Explorations, a Bellingham, Washington-based yacht charter, brokerage, and marine services ...
If you haven’t cruised the Rideau Canal before, you have missed a special treat and even if you ...
At the 2019 Vancouver International Boat Show I had the pleasure of meeting up with Allyson and ...
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 ...


The DocksBy Katherine Stone

Docks are well-lit and wide to accommodate dock carts.

Steeped in tradition that goes back to one of the oldest towns in Canada west of Quebec City, is Penetanguishene. This bilingual community of 9,000 is located in the middle of Huronia on the southeasterly tip of Georgian Bay in Simcoe Country, Ontario. The name is believed to have been derived from Algonquin (also believed to have come from the Wendat, Abenaki and Ojibwe tribes) meaning “place of the white rolling sands”. 

Read more about the Hindson Marina..........

 

Marine Products

  • Prev
Rancho Santa Margarita, CA - Forespar has just introduced a new smaller size version of their ...
As boaters we all have a very unique connection to the water and all the opportunities it presents. ...
Edited by the Quebec Marine Association under the direction of L'Escale Nautique (producer of the ...
Blue Guard has announced the general availability of the BG-One, a solid-state bilge pump switch, ...
With the introduction of the Ion Power Basic, a safe Lithium Ion battery formulated with Lithium, ...
Finding a car brand that you enjoy while it does what you need can be tough, as they can be ...
Yikes! No boat refrigeration? You’ve Got to be Kidding me!! But then again, true campers don’t use ...
The Walker Bay Venture 14 claims to be the world’s first luxury Explorer Sport Tender. It is ...
Mercury Marine is pleased to announce the launch of the new MerCruiser V8 6.2L 370hp Jet Ready ...
My history with the Cayenne goes back many years, as I was at the launch of the original vehicle ...