I. Installation Steps
Pre-installation Check: Verify engine model and horsepower match propeller specifications. Inspect propeller blades for deformation or damage. Ensure mounting holes are clean and free of debris.
Align Interface: Align the propeller keyway with the engine drive shaft key. Gently push onto the drive shaft, ensuring proper engagement.
Secure Locking Mechanism: Install washers and nuts sequentially. Tighten using a torque wrench to specified torque. Apply a lock washer to prevent loosening during operation.
Installation Verification: Manually rotate the propeller to confirm smooth rotation without binding or abnormal noise. Inspect the locking mechanism for secure fastening.
II. Operation and Maintenance
1. Usage Precautions
Strictly avoid high-speed navigation in shallow waters or reef areas to prevent blade impact with foreign objects.
Ensure the propeller is fully submerged before engine startup to prevent dry-running damage.
Match load to the engine's rated power to avoid overload operation.
2.Routine Maintenance
After each voyage, rinse salt and sediment from the propeller surface with fresh water, then dry thoroughly before storage.
Inspect blades for wear and corrosion every 3 months; replace immediately if cracks are found.
For long-term storage, apply rust-preventive oil and store in a dry, well-ventilated area away from heavy loads.
Engine Application:
3.25" Gearcase
35 HP (35B only) Thru 1984
40 HP 1984 &; Newer
MFS 40HP 2015~Newer
50 HP(All except 50C)1992 &; Newer
MFS60A 2019 &; Newer
BFT60/BFT60A 2014&;Newer