Stump-Jumper 8 HP Mud Motor

Stump-Jumper complete with 8 Hp Predator


Some assembly required. Engine is prepped ready for install.
Shipping included to the lower 48 states
A 5.5% sales tax applies to Wisconsin residents.

Harbor Freight tools offers.
Extended Service Protection for 1 yr @ $49.99  and 2 yr. @ $79.99

Customers can purchase, engine replacement plan for the Predator.
Bill’s Engineering, will provide engine receipt to customer. Customer has 90 days from the date on the receipt. To go into any Harbor Freight Tool store and purchase Extended Service Protection plan.
(N/A in AZ & NV)
For details go to
Stump-Jumper Features

  • Heavy Duty Tubular Frame support Construction ™ 1999 yr
  • Drive shaft housing DOM tubing.
  • Ultra-Reliable Direct Drive ™1999  yr. (the engine takes ZERO thrust unlike competitors)
  • Hollow drive shaft TM 2001 yr., reduces weight by 5 lbs. Stronger than a solid shafts. Hollow driveshafts are used in all rear wheel drive vehicle.
  • Bearing Nut TM. 1999 yr.Part of the lower bearing system. Does 3 things:
  • Acts as a stop nut for the propeller.
  • Keeps the seals in spec. (propeller are put out of balance when weeds collect on propeller).
  • Prevents drive shaft from bending, when takes an impacted from hitting object in the water  ( frame assembly absorbs impact load from propeller) Takes stress away from drive shaft.
  • Propeller 6.75×5 made from 15-5 Stainless Steel. Propeller designed by Bill’s Engineering LLc.
  • Low-Maintenance Sealed Bearing
  • Multi-Position Handle TM Patent Pending
  • Quick-Release Transom Mount ™ ( Stump-Jumper can be removed from your boat in seconds)
  • Twist Grip Throttle standard. Finger throttle lever upon request. Email Bill at ( 
  • Safety Lanyard Marine grade (clip style)
  • 2-Year Warranty on Frame. Haven’t replaced any frame assembly or driveshaft in pasted 15 yrs
  • Overall weight is 82 lbs  dry weight (Engine: 54 lbs; Frame: 28 lbs.)
  • Overall length is  inches (tiller handle in transport position or handle removed)
  • Driveshaft length:  60″

Predator 8 Hp Engine


Upgraded engineering and construction for improved lifespan. This Predator 301cc gasoline engine has gas-saving overhead valves for cooler, cleaner performance and longer life. The horizontal shaft is ball-bearing mounted, making this gas engine an ideal replacement for most standard engine configurations. The powerful gas engine features a durable cast iron cylinder making it the perfect replacement engine for a lawn mower, log-splitter and dozens of other machines.
  • Durable cast iron cylinder withstands wear and abuse
  • User-friendly controls for easy starting and operation
  • Fuel shut off for safe transport
  • This item can only be shipped within the 48 contiguous states via Standard Ground Shipping. In order to return this item for a refund or replacement, all fuel must first be drained.

Manufacturer Warranty Detail:

We guarantee: The emissions control system on your engine will be free from defects in material and workmanship for two (2) years, provided there has been no improper maintenance, misuse, or abuse of your engine. We guarantee this product to be free from defects in materials and workmanship for 90 days from the date of purchase. Limitations apply.