Welcome To The Propulsion Revolution™
Your new Sharrow MX™ is designed to enhance many performance characteristics of your boating experience. Please read the following directions in full before installing or using your Sharrow MX Propeller.
Please be sure to use the specified torque rating for the supplied hub-kit assembly when installing. See instructions inside hub-kit for installation instructions.
After you are finished installing your new Sharrow MX™ Propeller and you are ready to begin operating your vessel, read the following quick start directions below to begin familiarizing yourself with the Sharrow MX™ Propeller performance characteristics.
WARNING: ALWAYS WEAR THE SUPPLIED GLOVES WHEN HANDLING, CARRYING, OR INSTALLING THE PROPELLER OR REMOVING THE PROPELLER FROM YOUR MOTOR OR SERIOUS INJURY MAY OCCUR. The leading and training edges of the propeller are very sharp and require hand protection when handling, at all times.
Achieving Best Performance with a Sharrow Propeller Through Proper Engine Trim
NOTE: THE DESIGN OF THE SHARROW PROPELLER IS SUCH THAT MORE POSITIVE TRIM ANGLE IS TYPICALLY REQUIRED TO ACHIEVE MAXIMUM ENGINE RPM AND PERFORMANCE. IN MOST CASES, THIS WILL BE SIGNIFICANTLY MORE THAN THE STOCK PROPELLER THAT IS BEING REPLACED. PLEASE BE SURE TO TRIM THE ENGINES OPTIMALLY AT ALL PLANING SPEEDS. IF YOU HAVE QUESTIONS ABOUT THE PROPER WAY TO ACHIEVE OPTIMUM TRIM ANGLES, PLEASE, CONTACT SHARROW MARINE SUPPORT FOR ADDITIONAL INSTRUCTIONS. PLEASE SEE ADDITIONAL INFORMATION ON TRIMMING YOUR ENGINE(S) BY SCANNING THE QR CODE INCLUDED WITH YOUR PROPELLER(S).
- Use of trim (tilting of the engine up/down while underway) is an important element in achieving the optimal performance of any outboard powered boat. Proper engine trim achieves the most comfortable and safest ride while maximizing fuel efficiency in the variability of sea conditions.
- Although this may seem redundant to seasoned boaters that routinely utilize trim to fine tune their boating experience, the Sharrow Marine propeller design features unique characteristics (additional stern lift) that provide numerous advantages. As a result, a more positive trim setting than that of a conventional propeller will often result in optimal ride and efficiency.
- As the boat planes and achieves a flatter running attitude (not bow high) you can begin to utilize the trim up (from a full down) attitude to optimize trim.
- For maximum performance, trim engine up until you begin to either begin porpoising (the oscillation of the bow up and down) or you feel and hear the prop starting to ventilate or “slip”. (your speed will reflect slowing down as well) Then, trim down slightly and you have achieved optimum cruising attitude!
Maneuverability and Responsiveness
- While in the marina or around the dock, take note of each propeller’s effectiveness at slow speed.
- Take note of each prop’s ability to slow and stop the boat and its ability to produce sufficient and effective reverse thrust.
- Take note of the boat’s steering ability in reverse.
- If equipped with a joystick, time how long it takes for the boat to make a 360 degree turn.
Minimum Planing Speed
- Take note of the minimum RPM and MPH the boat maintains a planing configuration. The additional stern lift generated by the Sharrow propeller typically will allow the boat to maintain plane at a slower speed with improved visibility when compared to traditional propeller designs.
Resistance to Ventilation
- Often times, traditional propellers will exhibit “slip” when a boat is put into a turn at normal engine trim levels while cruising. It is not uncommon for operators to trim the engines to the full “down” position when anticipating a turn of the vessel.
- The blade design of the Sharrow propeller virtually eliminates blade tip vortices, greatly reducing the prop’s propensity to cavitate or ventilate in normal operation turns.
- Taking care to ensure safe operation, take note of each propeller’s ability and require trim level to maintain its bite and stay “hooked-up” when turning the vessel.
Midrange Efficiency and Speed
- A good test to evaluate the Sharrow MX Propeller midrange cruise speed efficiency is to perform “S” or “U” turn maneuvers.
- Get the boat on plane and set the throttle speed to maintain a slow planing cruise, typically around 3500 RPM.
- You should notice faster vessel speeds at your typical midrange RPM. 3-5 MPH speed increase is common but in same cases you may see even higher speeds.
- Initiate slow, gradual “S” and “U” turns and take note of any differences in speed and RPM. The less efficient a propeller is at midrange cruise, the more impact the additional load of the turn will have. Conversely, a higher efficiency propeller will be impacted less, allowing it maintain RPM and MPH more effectively.
Enjoy your new Sharrow Marine Propeller!
In no event shall Sharrow Marine be liable for any direct, indirect, punitive, incidental, special consequential damages, to property or life, whatsoever arising out of or connected with the use or misuse of our products.
Keep all body parts away from propeller when the motor is in operation to prevent serious injury or death.
Keep the propeller out of the reach of children at all times.
The purchaser of the propeller hereby waives any claim it may have against Sharrow Marine and its affiliates with respect to any injuries or other losses incurred as a result of the failure to strictly follow the instructions set forth herein.