GENUINE MERCURY REPLACEMENT PART
BRAVO II 17 3/4 R21- AL US
Part no. 18616A40
₺ equivalent is calculated at the current CBRT rate (2026-10-07); prices exclude VAT
Check compatibility first.
The model name alone may not be enough; the same model uses different parts across serial ranges.
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What does this part do?
Mercury propeller line. Damaged blades vibrate; choose a pitch that puts full-throttle RPM in the specified range. Sizing: diameter x pitch, RH/LH.
- Brand
- Mercury Marine
- Product group
- Propeller Selector
- Part number
- 18616A40
KNOW THE PART BETTER
Make the choice clear.
Propeller choice depends on diameter × pitch and the hub system (Flo-Torq); the same engine wants a different pitch depending on boat weight. The Propeller Selector narrows by boat type.
Have this ready when asking for a quote
Engine model and serial number, diameter × pitch on the current prop, boat type and wide-open-throttle rpm reached.
Propeller Specifications
View in the Propeller Selector →- Engine application
- Mercury MerCruiser Bravo Two
- Model
- Bravo Two
- Diameter (in)
- 17.8"
- Pitch
- 21"
- Material
- Aluminum
- Blades
- 3
Scope & hardware notes
- For all engines with a Bravo Two drive
- Bravo Two propeller attachment hardware is not included with the propeller
- Use with:
- 55074T Forward Thrust Washer
- 55073A 2 Aft Washer
- 34817 Tab Washer
- 826711 27 Propeller Nut
Source: 2025 Quicksilver Precision Parts & Accessories Guide.