Nautorius
Well-Known Member
From the USA where they are realising that running two 8.1litre petrols is not great and that by replacing with a single diesel and twin outdrives the future may be brighter!
Article is BOATTEST
Here are a few snippets from Boattest;
"To date, Mastry Engine Center in Tampa, Florida has quietly installed in 15 test boats of all types what could become a revolutionary new propulsion system for certain marine applications. In the process, Mastry has become the nation’s leading expert in the technology. In the beginning it was thought the best application would be for trawler-type boats between 35’ and 50’, but when Mastry plopped a Yanmar 6LY3 480-hp in a 27’ high performance design, it got people thinking about the advantages of the system in small boats too. "
"By the time Mastry got the 27’ Porsche which had been originally built in the 1980s, it was already neutered: the 454 Magnum MerCruiser engines had been taken out. Mastry says that with those engines its WOT was 79 mph. Mastry installed a 480-hp Yanmar 6LY3 diesel on the centerline and the three “Geared Up” boxes weighing a total of 350 lbs. Total: 1,761 lbs. The two 454 magnums had weighed about 2,260 lbs total, so the boat now weighed nearly 500 lbs. less with the single diesel. With the “Geared Up” system Mastry was able to turn the engine around which meant that the pulleys and belts were now at the transom and the drive shaft was low going forward.According to Mastry, the top speed of the 7200 lb. 27’ Porsche with the single diesel was 62 mph, with best cruise at 47 mph at 2600 rpm, getting 4.35 mpg. Not bad for a high performance boat. "
Looks good to me!
Paul /forums/images/graemlins/smile.gif
Article is BOATTEST
Here are a few snippets from Boattest;
"To date, Mastry Engine Center in Tampa, Florida has quietly installed in 15 test boats of all types what could become a revolutionary new propulsion system for certain marine applications. In the process, Mastry has become the nation’s leading expert in the technology. In the beginning it was thought the best application would be for trawler-type boats between 35’ and 50’, but when Mastry plopped a Yanmar 6LY3 480-hp in a 27’ high performance design, it got people thinking about the advantages of the system in small boats too. "
"By the time Mastry got the 27’ Porsche which had been originally built in the 1980s, it was already neutered: the 454 Magnum MerCruiser engines had been taken out. Mastry says that with those engines its WOT was 79 mph. Mastry installed a 480-hp Yanmar 6LY3 diesel on the centerline and the three “Geared Up” boxes weighing a total of 350 lbs. Total: 1,761 lbs. The two 454 magnums had weighed about 2,260 lbs total, so the boat now weighed nearly 500 lbs. less with the single diesel. With the “Geared Up” system Mastry was able to turn the engine around which meant that the pulleys and belts were now at the transom and the drive shaft was low going forward.According to Mastry, the top speed of the 7200 lb. 27’ Porsche with the single diesel was 62 mph, with best cruise at 47 mph at 2600 rpm, getting 4.35 mpg. Not bad for a high performance boat. "
Looks good to me!
Paul /forums/images/graemlins/smile.gif
