21661929 Propeller | Genuine Volvo Penta Part

🔧 Product Description

Type IH is the aluminium Duoprop range for Aquamatic DPS-B sterndrives, the drives with helical (spiral) propeller-shaft splines. The patented blade geometry and large active propeller diameter give optimal performance and fuel efficiency over the entire speed range, together with smooth running, excellent grip and manoeuvrability. Squeeze casting and a special high-strength aluminium alloy make them stronger and more durable than traditional die-cast propellers, and four layers of paint give excellent anti-corrosion performance. This is the IH9 rear propeller; the matching front propeller is 21661909, and the pair is also listed as set 21661949. Every set of Duoprop propellers is designed, tested and manufactured together, so the front and rear propellers of a dimension belong to each other.

🚤 Compatibility

• Engine Family: V, D, DPS
• HP Range: 140-430 HP

Full model list at the end of this description.

⚙️ Key Features

• Type IH aluminium Duoprop rear propeller, dimension IH9
• Four-blade right-hand rotation
• Pairs with front propeller 21661909; the complete set is 21661949
• 3.528 kg
• Squeeze cast in high-strength aluminium alloy and finished in four layers of paint
• For DPS-B drives with helical propeller-shaft splines
• Engineered to optimize performance, durability and comfort.
• Patented blade geometry, large active propeller diameter.
• Strong and durable high strength aluminium alloy.
• Three-blade front propeller and four-blade rear propeller.
• Type IH has helical (spiral) splines - for DPS-B drives.
• Material: aluminium
• Fits: DPS-B (helical/spiral splines)
• Type: IH9
• Set contains: set 21661949, front 21661909

🔌 Function

The rear propeller works with the matched front propeller to recover rotational energy and produce balanced counter-rotating thrust.

⚠️ Common Signs of Failure

• Vibration through the hull rising with speed
• Slipping feel, revs up and speed down
• Blade tips dinged, bent or pitted
• Fishing line wrapped behind the hub
• Splines worn or damaged when the propeller is drawn

🛠️ Service Notes

• Fit it with the front propeller 21661909 of the same IH dimension - front and rear work only as a matched pair
• Of the nine Type IH rear propellers listed here, IH2 to IH10, this is the lightest at 3.528 kg, but the weights do not climb with the dimension code - order by the IH marking
• Clear any line from behind the propeller and check the drive anodes and shaft seal before refitting
• Always use type F or FH stainless steel propellers in 6-cylinder diesel engines or engines exceeding 240 hp or capable of speeds above 38 knots (45 mph).
• The straight-spline DPS and DPS-A drives take Type I propellers instead. A Type IH propeller will not fit a straight-spline drive.
• Always use propellers of the same type and size on the drive, or on both drives in twin installations.
• Installation hardware for types D, I, IH, F and FH: rear propeller nut 21631162, front propeller nut 3851569.

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21661949 - Complete Type IH9 front and rear propeller set
• 21661909 - Matching Type IH9 front propeller
• 21631162 - Rear propeller nut
• 3851569 - Front propeller nut
• 3855516 - Duoprop tool kit

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1GiE-KF, 8.1GiE-K, 8.1GiE-M, 8.1GiE-P, 8.1Gi-J, 8.1Gi-JF, 8.1GXiE-K, 8.1GXiE-KF, 8.1GXiE-M, 8.1GXiE-P, 8.1GXi-J, 8.1GXi-JF, 8.1OSi-J, 8.1OSi-JF, 5.7GXi-320-R, 5.7GXiE-320-R, 5.7GXiC-320-R, 5.7GXiCE-320-R, 5.7GXiC-J, 5.7GXiC-JF, 5.7GXiCE-JF, 5.7GXiCE-J, 5.7GXiCE-M, 5.7GXiC-P, 5.7GXiCE-P, 5.7GXi-J, 5.7GXi-JF, 5.7GXiE-KF, 5.7GXiE-K, 5.7GXiE-M, 5.7GXiE-P, 5.7GXi-P, 5.7OSi-300-J, 5.7OSi-300-JF, 5.7OSXi-J, 5.7OSXi-JF, 5.7Gi-300-J, 5.7Gi-300-JF, 5.7GiCE-300-M, 5.7GiE-300-N, 5.7Gi-300-N, 5.7GiE-300-P, 5.7Gi-300-P, 5.7Gi-300-R, 5.7GiE-300-R, 5.7GiC-300-J, 5.7GiCE-300-J, 5.7GiCE-300-JF, 5.7GiC-300-JF, 5.7GiC-300-P, 5.7GXiE-N, 5.7GXi-N, 5.7GiE-300-K, 5.7GiE-300-KF, 5.7GiE-300-M, 5.7GiCE-300-P, 5.7GiC-300-R, 5.7GiCE-300-R, 4.3OSi-J, 4.3OSi-JF, 5.0GiC-225-S, 5.0GiCE-225-S, 5.0GiC-J, 5.0GXiCE-JF, 5.0GXiCE-J, 5.0GXiC-JF, 5.0GXiCE-M, 5.0GXiC-P, 5.0GXiCE-P, 5.0GXi-J, 5.0GXi-JF, 5.0GXiE-K, 5.0GL-J, 5.0GL-JF, 5.0GXi-270-R, 5.0GXiE-270-R, 5.0GXiC-270-R, 5.0GXiCE-270-R, 5.0GXiC-J, 5.0GXiE-KF, 5.0GXiE-M, 5.0GXiE-N, 5.0GXi-N, 5.0GXiE-P, 5.0GXi-P, 4.3Gi-200-R, 4.3GI-Q, 4.3GL-J, 4.3GL-JF, 4.3GL-P, 4.3GXi-225-R, 4.3GXiE-225-R, 4.3GXiE-M, 4.3GXi-P, 4.3GXiE-P, 4.3GXi-Q, 4.3GXiE-Q, 4.3GXi-J, 4.3GXi-JF, 4.3Gi-200-S, 4.3GXi-225-S, 4.3GXiE-225-S
• Volvo Penta V8-350-C-R, V8-350-CE-R, V8-380-C-R, V8-380-CE-R, V8-430-C-R, V8-300-C-M, V8-300-CE-M, V8-350-C-M, V8-350-CE-M, V8-300-C-N, V8-300-CE-N, V8-350-C-N, V8-350-CE-N, V8-380-C-M, V8-380-CE-M, V8-270-C-B, V8-270-CE-B, V8-300-A, V8-300-E-A, V8-300-B, V8-300-E-B, V8-300-C-A, V8-300-CE-A, V8-300-C-B, V8-320-C-B, V8-320-CE-B, V8-300-CE-B, V8-320-A, V8-320-E-A, V8-320-B, V8-320-E-B, V8-320-C-A, V8-320-CE-A, V8-380-CE-A, V8-380-C-B, V8-380-CE-B, V8-380-C-D, V8-380-CE-D, V8-430-CE-D, V8-350-C-D, V8-350-CE-D, V8-380-C-A, V8-380-CE-J, V8-380-C-J, V8-430-CE-J, V8-430-C-J, V8-350-C-H, V8-350-CE-H, V8-350-C-J, V8-350-CE-J, V8-300-C-R, V8-300-CE-R, V8-430-CE-R, V8-430-C-M, V8-430-CE-M, V8-300-C-K, V8-300-CE-K, V8-350-C-K, V8-350-CE-K, V8-380-C-K, V8-380-CE-K, V8-430-C-K, V8-430-CE-K, V8-300-C-P, V8-300-CE-P, V8-350-C-P, V8-350-CE-P, V8-380-C-P, V8-380-CE-P, V8-430-C-P, V8-300-CE-G, V8-300-C-G, V8-300-C-H, V8-300-CE-H, V8-300-C-J, V8-300-CE-J, V8-350-C-G, V8-350-CE-G, V8-225-C-A, V8-225-CE-A, V8-225-C-B, V8-225-CE-B, V8-270-A, V8-270-E-A, V8-270-B, V8-270-E-B, V8-270-C-A, V8-270-CE-A, V8-380-C-N, V8-380-CE-N, V8-430-C-N, V8-430-CE-N, V8-430-CE-P, V8-300-C-S, V8-300-CE-S, V8-350-C-S, V8-350-CE-S, V8-400-CE-R
• Volvo Penta V6-200-N, V6-200-C-N, V6-200-CE-N, V6-240-M, V6-240-C-M, V6-240-CE-M, V6-280-M, V6-280-C-M, V6-280-CE-M, V6-280-J, V6-280-CE-J, V6-280-G, V6-280-C-G, V6-280-CE-G, V6-280-C-J, V6-240-N, V6-240-C-N, V6-240-CE-N, V6-280-N, V6-280-C-N, V6-240-CE-K, V6-280-CE-K, V6-200-P, V6-200-C-P, V6-200-CE-P, V6-250-P, V6-250-C-P, V6-250-CE-P, V6-280-P, V6-280-C-P, V6-280-CE-P, V6-200-C-G, V6-200-G, V6-200-J, V6-200-C-J, V6-200-A, V6-225-A, V6-225-E-A, V6-280-CE-N, V6-200-M, V6-200-C-M, V6-250-O, V6-250-C-O, V6-250-CE-O, V6-240-C-G, V6-240-CE-G, V6-240-G, V6-240-J, V6-240-CE-J, V6-240-C-J, V6-200-R, V6-200-C-R, V6-250-R, V6-250-C-R, V6-250-CE-R, V6-280-R, V6-280-C-R, V6-280-CE-R
• Volvo Penta D3-220I-G, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-170I-G, D3-200I-G, D3-140A-H, D3-170A-H, D3-200A-H, D3-220A-H, D3-140I-H
• Volvo Penta DPS-D1 OX, DPS-D, DPS-D OX, DPS-D1, DPS-B, DPS-B OX, DPS-B1 OX, DPS-B1