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

  • Prev
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 ...
The British Virgins took a huge hit last fall from Irma. Boats were stranded on the shore by the ...
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.

An Abacos Adventure

Great Guana CayBy Mark Stevens; Photos by Sharon Matthew-Stevens

It’s a perfect Sunday morning jaunt.

We’re gliding through green-blue waters, colours so vivid and bright they hurt your eyes. We’re set for a close reach out of a harbour guarded by a necklace of tiny emerald islands decorated by palms that dance in fifteen knots of wind.

Our boat, “Tropical Escape II” (perfect name for both the boat and our adventure), is a 44-foot Robertson and Caine catamaran, chartered from Sunsail’s Marsh Harbour base on Bahamas’ Great Abaco Island.

Read More about An Abacos Adventure...

 

Lifestyle

  • Prev
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” ...
As the sole arbiter of the Photo of the Week I, your editor, get to make the choice. This week, ...
Michele Stevens pointed us to this interesting project which recently came to fruition in Cape ...
Our Photos of the week this time come from BC where our friend Rob Stokes sent us a very nice ...
Our little treasure: Montague (Monte) taken at Pirate's Cove in the Gulf Islands. Monte is a ...
It has been a long, hot summer here on Georgian Bay and we miss Adamant 1 terribly. We did manage ...
On Thursday last week, at age 88, Bruce Kirby has been invested into the Order of Canada for his ...
The Olympic Qualification Regatta is now being held in Aarhus Denmark with unlimited entries. That ...

Boat Reviews

  • Prev
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 ...
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 ...
Commodore’s Boats is a full service shipyard with over 50 years of generational history and ...

Hanse 388

Hanse 388By Katherine Stone

The Hanse group produced their second most popular boat of all time with the Hanse 385. The trick was to build on that winning formula when they upgraded to the Hanse 388, which they have done in spades. The German build quality is first rate and true to the Hanse tradition. Leaving the hull the same with a steep stern and straight stem for an optimal long water line, they went with a slightly stiffer, heavier displacement, new deck, interior layout and window line. Hanse’s highly experienced yacht construction team, judel/vrolijk & co., have combined ease of sailing, comfort and performance into the newly designed Hanse 388.

Read more about the Hanse 388...

 

 

 

Marine Products

  • Prev
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 ...
Weather nerds and boaters of all stripes will be absorbed by Bruce Kemp’s account of the monstrous ...
Canada Rope promises that its new Night Saver Rope will illuminate at night and act as a reference ...
Take a look as a 68-foot yacht docks itself in between two Volvo Ocean 65 sailing yachts at the ...
Industry Firsts Include Direct Injection and Integrated Electric Steering System
Verviers, Belgium, 18 May 2018 — Mercury Marine, the world leader in marine propulsion technology, ...
Again, we return to the beginning. We started this column with a look at marine navigation for ...
Ga-Oh (spirit of the winds in Algonquin) creates bags and other items from re-purposed sails.