We at Bill's Engineering are all about getting you to places others can't and the lightweight 7hp Subaru-Robin powered Stump-Jumper will do just that.
The Stump-Jumper with the Subaru-Robin EX21 7hp OHC engine weighs in at just 63lbs! That's nearly 10% less than our closest competitor!1 But lightweight doesn't mean light duty! Stump-Jumper frames are built with tubular construction and fully jig welded to exacting standards. Stump-Jumper also features our proprietary E-Z setup direct drive coupler, our direct drive coupler eliminates power robbing U-joints. This means that the propshaft and prop see almost virtually all the power the engine makes. Speaking of power, the Stump-Jumper with the 7hp Subaru-Robin EX21 is the most powerful engine available for a long tail outboard motor in its class2. The lightweight and powerful Subaru-Robin EX21 features overhead cam design, pent roof combustion chamber, and other technologies that improve power and reliability while reducing weight. The EX21's overhead cam design features 33% fewer moving valvetrain parts and an optimized capacity muffler that translates into a two decibel noise reduction advantage over its competitors3. We've tested the EX21 in the most demanding conditions and it's proven itself to be reliable and the best engine choice for our Stump-Jumper.
The EX21's power is transmitted to the prop via a Stump-Jumper exclusive design propshaft.The propshaft is supported by a low maintenance sealed bearing design that does not require daily greasing. Connected to our propshaft is our own Stump-Jumper 6 ¾ x 5 420 stainless steel prop. We've tested and refined this prop specifically for our design to provide maximum performance and tempered it to a Rockwell 43 hardness for the perfect balance of durability and wear resistance.
Because being able to go were others can't isn't going to help if you can't get there safely or at all, Bill's Engineering has built in safety features such as twist grip throttle control that allows easy and precise control that automatically returns the throttle to closed position if the operator's hand comes off the handle, and a safety lanyard that kills engine power if the operator is thrown from the boat.
The Stump-Jumper is perfect for anyone who needs a lightweight highly capable outboard motor. Perfect for flat bottom boats, square stern canoes or any boat with a short transom, the Stump-Jumper at just 63lbs. when equipped with the 7hp Subaru-Robin EX21 is easily carried allowing you to gain access to areas without a boat landing. Once you get to the water Stump-Jumper is easily attached in seconds with our quick disconnect transom mount. The Stump-Jumper also features a multi-position handle that can be reversed to aid in transport or storage.
Using the Stump-Jumper is pleasant and hassle free experience. The Subaru EX21 features automatic decompression to aid in starting, especially important during cold northern hunting seasons. The transom mount balances the weight of the motor assembly making raising and lowering the engine a breeze, and the ergonomic tiller handle adjusts to multiple positions to accommodate different boats and drivers. The powerful motor and propeller design cuts through weeds, muck and sand with ease allowing you to focus on where you want to go and enjoy the outdoors rather then worrying if you'll make it.
Now get out there and experience the backwaters with the Stump-Jumper by Bill's Engineering!
1 Based off of advertised weight and horsepower.
2 Mini long tail mud motors less than 63 lbs.
3 Source: robinamerica.com
Engine: Subaru Robin EX21
Horsepower (Peak): 7.0@4000rpm
Torque (Peak): 10.26 ft-lbs@2500rpm
Stump-Jumper frame assembly
Stump-Jumper 6 ¾ x 5 propeller
Long handle kit
E-Z setup coupler kit
Quick disconnect transom mount
All required hardware included.
Total: 63 lbs.
Engine (Subaru EX21): 36 lbs.
Overall(long handle): 87
With handle in transport
position or handle removed: 66
Shaft length: 55
Some assembly required.
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