The Honda BF40 and BF50 XL (Extra Long) lower unit assembly has the following specifications:
- Shaft Length: 25 inches (635 mm)
- Gear Ratio: 2.08:1 (or 2.09:1 in some earlier models)
- Gear Shift: F-N-R (Forward-Neutral-Reverse)
- Exhaust: Through Prop
- Propeller: Optional (not included with the assembly)
Key Details
- The XL shaft version of the complete outboard engine typically has a dry weight of around 212-223 lbs (96-101 kg), though the lower unit assembly alone would be less.
- The lower unit for both BF40 and BF50 models is generally the same due to shared engine block and design.
- Newer models feature Programmed Fuel Injection (PGM-FI), while older models (pre-2007) may be carbureted; the lower unit assembly itself is compatible across these versions within certain date ranges (e.g., 1997-2007 and later).
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