Philbrook's Boatyard Ltd.

No Job Too Complex or Too Small

Single Engine – Twin Screw Drive Systems

Welcome to Geared Up Systems! Philbrooks Boatyard is the exclusive distributor in the Pacific Northwest providing installations, parts and customer support for this innovative and proven propulsion system.

Here you'll see what happens when the need for a more flexible and economical marine drive system meets more than 25 years of experience in industrial gear system design. The result is the Geared Up System, and an answer to a critical need of the marine boating industry - how to get twin-screw performance from a single screw boat.

A drive system that provides:

  • The maneuvering advantages of a twin screw
  • The economies of a single engine
  • More design versatility than any system on the market

With over 25 years of production experience in corrosion resistant gear drive systems for the automotive, off-road, and industrial applications, Geared Up Systems now provides the ultimate drive system for the marine industry, the single engine twinscrew drive.

Let Philbrooks assist you in laying out the optimum system for your boats. The drive system offers many benefits including maneuverability, economy, installation ease and design versatility. Without changing your design, you could be offering your customers new options with these advantages:

Maneuverability: Independent port and starboard transmissions allow maneuverability previously found in twin engine boats only. Holding up on a fishing spot, parking or docking (even in a river or tidal current!), and positioning or repositioning a workboat can be accomplished as easily as with a twin screw, without the need for bow thrusters.

Economics: The drive system provides single engine economies, including the savings in fuel, servicing, and layup, plus the savings of the cost of the redundant engine, and the economics of pushing a boat that weighs less and needs to carry less fuel for the same mission capability.

Better Boat: The system allows the engine to be buried deep in the hull of the boat, lowering the center of gravity. A shallower draft provided by twin propellers, spread-out rather than under the keel. Whether your boat needs the engine forward or astern, or if you need an off-center line engine installation, the System makes it possible.

Ease of Installation: In all installations, the engine, engine adapter and primary splitter gearbox mount as a single unit. The final drive gearboxes and/or marine transmission mount in alignment with the propeller shaft. The splitter gearbox and the final drive gearboxes are connected with the constant velocity shafts or universals allowing for engine torque within the mount and misalignment between the primary and final drives. Propeller thrust may be terminated into the final drive component or a thrust plate arrangement that terminates into the boats stringer system.

Contact Philbrooks to confirm the benefits and economics of the Geared Up System for your boat!

Toll free number: 877 656-1157
Local: 250 656-1157
Seattle: 360-718-6569
Vancouver: 604–943-6665
John Potter: specialist

Before a "Geared Up Systems" Repower

After a "Geared Up Systems" Repower