Bolt-on Belt Reduction Air Drives for Predator, Briggs and Stratton, Kohler, Honda, for Aircraft, Airboats, Hovercraft

Hoverhawk Corporation

Belt Reduction Drive for Air Cooled Industrial Engines!

Our rugged belt reduction drive unit is designed for industrial engines, including the popular Predator, Honda, Kohler and Briggs and Stratton, Vanguard and similar single or twin cylinder Chinese-made clone engines. These engines are commonly used on hovercraft, small airboats, mini-airboats, for a pusher fan kit for boats and industrial ventilation systems. This air drive comes ready to install on your engine. Developed specifically for the harsh marine environment. It is designed for engines up to 40 horsepower which turn up to 4000 RPM maximum, and is constructed primarily of aluminum and stainless steel for durability in a wet environment. The V-belt is quiet and efficient. The muffler and exhaust system on some engines may have to be re-located or modified to provide clearance for the reduction drive to mount. Specify the reduction ratio when ordering. 

A reduction drive unit allows use of a larger diameter propeller, turning more slowly, for more propeller efficiency (more thrust per HP) and quieter operation.  Our reduction drives come with Rotax 75mm bolt circle pattern with a standard 1 inch centering pilot, face plate and 5/16 inch propeller mounting bolts.  Choose the particular Reduction Drive that meets or exceeds your engine's maximum horsepower output. We will help you match a propeller to your particular reduction drive choice.

Email us with any questions:  hoverhawkcorp(at)gmail.com

Belt Drive components that are included

Belt Drive Mounted on a Harbor Freight Predator 22 HP Engine
(Included prop extension not shown)

Our Reduction Drive works very well with Ultra-Props !
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Belt Reduction Drive Installation Torque Specifications:
(4) 3/8 inch Backing Plate Mounting SS bolts-15 ft.lbs. or 180 in. lbs.
(6) 5/16 inch Propeller Mounting SS bolts--11 ft.lbs or 132 in. lbs.

Compact, Efficient, Reduction Drive/Propeller Air Drive Combinations For Airboats and Hovercraft
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1) You supply 22 HP Harbor Freight Predator Engine-4,000 Max. RPM (cost under $600)
Add our bolt-on 1.68 to 1 belt drive--$799
Add our 42 inch 3-blade T5 fan with adjustable pitch--$329
90+ pounds thrust typical at full throttle.
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2) You supply 22 HP Harbor Freight Predator Engine-4,000 Max. RPM (cost under $600)
Add our bolt-on 1.68 to 1 belt drive--$799
Add our 36 inch 3-blade T5 Fan with adjustable pitch--$329
82+ pounds thrust typical at full throttle.
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3) You supply 13 HP Harbor Freight Predator Engine-3600 Max. RPM (cost under $400)
Add our bolt-on 1.68 to 1 belt drive--$799
Add our 31 inch 3-blade T4 Fan with adjustable pitch--$239
55+ pounds thrust typical at full throttle.
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 Email Us: hoverhawkcorp(at)gmail.com

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