21657164 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Duoprop Type I4 Rear Aluminium Propeller - Part Number: 21657164

A four-blade right-hand-rotation rear propeller from the Volvo Penta Type I4 aluminium Duoprop system for DPS and DPS-A drives.

⚙️ Key Features

• Propeller size: I4

• Rear propeller position

• Four-blade right-hand rotation

• High-strength aluminium alloy

• Straight-spline DPS / DPS-A design

• Matched to the corresponding three-blade front propeller

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• Current OEM reference: 21657164

• Type I series replaces the earlier Type D aluminium propeller range

OEM / Related Numbers:

• 21657164

• 21258484 - Complete Type I4 front and rear propeller set

• 21260644 - Matching Type I4 front propeller

• 21631162 - Rear propeller nut

• 3851569 - Front propeller nut

• 3855516 - DPS Duoprop tool kit

Aftermarket / Verified Equivalents:

• No direct aftermarket equivalent

🚤 Compatibility

• DPS sterndrive

• DPS-A sterndrive

• DPS-A OXi sterndrive

• Use the same propeller type and size on both drives in twin-engine installations

• Do not mix Type D and Type I propellers on one drive

• For high-power or high-speed installations, use the specified stainless-steel propeller family

🔌 Function

The rear propeller works with the matched front propeller to produce efficient counter-rotating thrust, strong acceleration and improved steering control.

Common signs of failure or damage:

• Bent or chipped blades

• Cavitation erosion

• Vibration under load

• Reduced acceleration or top speed

• Hub or spline damage

• Mismatched front and rear propellers

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging