21661944 Propeller Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta DPS-B Type IH4 Aluminium DuoProp Propeller Set - Part Number: 21661944

A genuine Volvo Penta matched Type IH4 aluminium DuoProp set for DPS-B sterndrives with helical / spiral-spline propeller shafts. The three-blade front propeller and four-blade rear propeller are engineered as a matched hydrodynamic pair and must not be mixed with another size or propeller family.

Kit Contents:

• 1 x three-blade front aluminium propeller - Volvo Penta 21661904

• 1 x four-blade rear aluminium propeller - Volvo Penta 21661924

⚙️ Key Features

• Matched Volvo Penta Type IH4 propeller pair

• Three-blade front and four-blade rear design

• Aluminium construction with shock-absorbing hub system

• For DPS-B helical / spiral-spline shafts

• Must be replaced as a matched size pair

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21661944 current Type IH4 complete propeller-set reference

OEM / Related Numbers:

• 21661944

• 21661904

• 21661924

• Volvo Penta Type IH4 installation hardware selected by DPS-B serial number

Aftermarket / Verified Equivalents:

• No direct aftermarket equivalent with Volvo Penta matched-pair calibration

• Volvo Penta Type FH stainless-steel sets are an optional performance upgrade in corresponding available sizes, not a direct material-equivalent replacement

🚤 Compatibility

Commonly used on:

• DPS-B DuoProp propulsion

• Replacement of damaged matched propellers

• Performance correction by Volvo propeller-size selection

Typically suits:

• Engine models / drive models:

• DPS-B sterndrives using Type IH propellers

• DPS-B applications calculated for Type IH4

• HP Range: Not horsepower-specific

• Engine Type: Volvo Penta DPS-B DuoProp sterndrive

• Year Range: DPS-B production generation

• Serial Range: Drive, gear ratio, boat load and propeller-size controlled; confirm the existing Type IH designation and sterndrive serial number

🔌 Function

The counter-rotating propellers recover rotational energy, improve grip and steering response, and convert engine torque into efficient thrust with reduced cavitation.

Common signs replacement or overhaul is required:

• Blade is bent, cracked or heavily corroded

• Hub has slipped or absorbed a severe impact

• Vibration appears under load

• Front and rear propellers are mismatched

• Engine cannot reach the correct wide-open-throttle range

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging