Thank you again for your help! Dino Pellegrini
There were many challenges to this project like space and weight as well as the relentless pounding a bow picker takes on the Copper River Flats. With a clean install, I have enough room to perform maintenance. I am very happy with my choice of MER. I found the customer service very easy and accommodating to my needs. This system works great. Rich Wheeler
We believed that the Traktor Jet would be a good propulsion solution for the shallow draft needs of our design so we began speaking with Bob Allen at MER Equipment in Seattle at that time regarding different power supply manufacturers. After speaking with Bob, we settled on a John Deere AFM 6081 M3 rated, 330 HP marine diesel engine with a ZF transmission coupled to the jet model available at that time which was the TJ 609HT jet. The design and final product turned out so well that we have just launched the 9th vessel of similar design and we have 2 more presently under contract.
The vessel design is 64’ x 17’ with a 44-degree dead rise on the hull. The boats weigh in at about 23 tons and regularly haul 40-50 ton loads. The evolution of the jet and impeller design since 2004 has allowed us to try various John Deere power alternatives providing increasing performance values over the different set ups. The engine paired to the last vessel was the John Deere AFM 6125 M4 rated at 525 hp utilizing the ZF tranny. The difference in the engine, jet and impeller design coupled with slight changes in jet placement have yielded an increase in speed during sea trials from 13.5 knots for the first boat to 21.8 knots for the last boat launched.
We also built a similar hull design utilizing twin TJ 457HT jets coupled to John Deere TFM 6068 M3 rated, 200 HP marine diesels. Given changes in engine design, were we to build that same boat today, we would utilize the new John Deere AFM 6068 M4 rated, 300 HP marine diesels.
Bob and the rest of his crew at MER have been great to work with in terms of design and implementation ideas and have responded well to matching the increase in horsepower available to increased horsepower capacity of their jet designs providing for a better power platform for all involved in our projects.
Our customers have been overwhelmed by the power and load capacity of our boats and their maneuverability as well, as even with a single jet design, the boats are able to turn a circle within their own length. We have not had any problems with the engines or jets and have actually gained greatly in terms of time and money spent on maintenance of standard oyster harvest vessel designs. Ian Jeffernds
Long story short, the sticky grease worked, liner seated, impeller inserted with soap on the vanes and grease on the splined shaft and impeller gear just like we learned in the 6125 class. Good to go thanks to MER’s expert and very friendly service. Jim Flaherty