JAWS II Refit – Twin Volvo Penta Diesel Engines

The 50′ Viking Princess is a luxurious high-performance mid-sized English motor yacht. It is a very popular and classic model with a long production run from 2001-2010.

Viking Sport Cruiser 50
ABOVE: JAWS II visiting Stuart, Florida in February 2017. Refit incomplete.

Follow JAWS II major refit of over $450,000 spent during 2015-2017. JAWS II is a 2002 50′ Viking Princess flybridge motor yacht. This model is also called a Viking Sport Cruiser. Refit is a boating term used to describe repairs or renovation.

Email Sailing@RyeYC.org for price.*
Located: Mamaroneck, NY (North side of Western Long Island Sound)
*(List price of a comparable 2017 Viking Princess is $1,800,000).

An Explanation of names: Viking Yachts, Princess Yachts and Viking Sport Cruisers (VSC)

In 1995 Viking Yachts, legendary for building sport fishing boats, saw increasing U.S. demand for a sporty European motor yacht. Viking partnered with the high-end U.K. builder, Princess Yachts, to bring their boats into the U.S. under the Viking brand. It was named the Viking Sport Cruiser (VSC). Thus in 1996 the first Viking Sport Cruiser was imported into the U.S. By the later 1990’s this collaboration expanded to 13 models from 40′ to 84′. Beginning in model year 2011 Viking and Princess changed the Viking Sport Cruiser name back to Princess Yachts for all boats imported into the Western Hemisphere. As of 2017 Viking Sport Cruisers continues as the distributor under the Viking Yachts umbrella to import Princess Yachts.

JAWS II Refit – Table of Contents:
1 – Home Page – 50′ Viking Princess Yachts
2 – General Photos and Layout
3 – Twin Turbocharged Volvo Penta Diesels
4 – Generator, Drive Shafts and Props
5 – Electrical
6 – Plumbing
7 – Exterior
8 – Interior
9 – About the Owner

Engines:  Twin turbocharged Volvo Penta Diesel 675 hp D-12’s with 1100 hours.

There are a total of six coolers that should be removed and serviced as part of the recommended 1,000 hour engine service. These six coolers include two for each engine plus one for each transmission. However this is rarely performed because it can triple the cost of the 1,000 hour engine service. That’s why many diesel boats are for sale in the 700 – 900 hour range. The comprehensive 1,000 service for this boat cost $30,000. You will see why it is necessary below.

The coolers have been dropped off for cleaning and all parts have arrived. We found a broken flange on a discharge pipe that needs replacing and there are two bolts in the heat exchanger that were seized due to a salt water leak. That housing has been sent out to our machine shop for extraction and thread repair.

We will go ahead as planned with replacing the thermostat on the port engine. Next we will address the ignitions, belts and valve adjustments. Then we will replace the generator belt.

Lastly we will reinstall the coolers and housing after they return from our vendors and replace the thermostat on the starboard engine. The temperature sensors were replaced on both engines when the coolers were reinstalled.

The EDC was also replaced at the lower helm as were all the engine gauges at the upper helm.

Air Charge Cooler
Air Charge Cooler
Broken Bolts in Heat Exchanger
Broken Bolts in Heat Exchanger
Coolant Discharge Pipe
Coolant Discharge Pipe
Discharge Cooling Pipe Broken
Discharge Cooling Pipe Broken
End Covers for Heat Exchanger
Removed end covers for the heat exchanger
Heat Exchanger and Air Charge Cooler Removed
Removed the starboard heat exchanger and the air charge cooler
Heat Exchanger With End Plate Removed
The heat exchanger with the end plate removed
Oil Fill Tube Leak
There was a leak at the oil fill tube
Other Side of Heat Exchanger with End Plate Removed
The other side of the heat exchanger with the end plate removed
Viking Princess Jaws II cooler parts
Engine cooler parts ready for installation
Viking Princess Jaws II cooler parts
Cooler parts back from the machine shop
Viking Princess Jaws II cooler parts
Cooler parts back from the machine shop
Viking Princess Sport Cruiser cooler parts
Cooler parts back from the machine shop
Viking Princess Sport Cruiser Jaws II cooler parts
Jaws II cooler parts back from the machine shop
JAWS II Viking Princess gearbox cooler
Replaced gearbox cooler
Viking Princess heat exchanger and air charge cooler
Replaced starboard heat exchanger and air charge cooler
Flushing intercoolers on Viking Yachts
The port coolers were done next. Access was difficult. Therefore this is not done by many boat owners despite manufacturer recommendations. However you can see this work was needed. Merely flushing the coolers will NOT work!

The port intercoolers have been properly cleaned and are ready to be placed back on the engine.

JAWS II Refit – Table of Contents:
1 – Home Page – 50′ Viking Princess Yachts
2 – General Photos and Layout
3 – Twin Turbocharged Volvo Penta Diesels
4 – Generator, Drive Shafts and Props
5 – Electrical
6 – Plumbing
7 – Exterior
8 – Interior
9 – About the Owner