Stump-Jumper 8 Hp Mud Motor


Stump-Jumper complete with 8 Hp Predator Engine.

At Bill’s Engineering we’re all about getting you to places others can’t and the lightweight Stump-Jumper Mud Motor does just that.

Shipping included to the lower 48 states! A 5.5% sales tax applies to Wisconsin residents.

Some assembly required. Engine is prepped ready for install.

SAVE $25 by paying with personal check or money order, send to Bill’s address on the contact page.

Our mud motors come with a twist grip throttle by standard.  If you would like a finger lever throttle, attach an “Instruction to merchant” when checking out.

Please Contact us Here for AK, HI, and International orders.

Category: Tags: , , Product ID: 1254


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)
  • 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″

Harbor Freight tools offers and 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 an engine receipt to customer. Customer has 90 days from the date on the receipt to go into any Harbor Freight Tool store and purchase an Extended Service Protection plan.
(N/A in AZ & NV) For details go to

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.