3863494 Kit | Genuine Volvo Penta Part

🔧 Product Description

Type GR is the stainless steel Duoprop range developed for the DPR high-speed drive, to maximise performance and efficiency. The high-performance blade geometry and great strength ensure maximum grip and manoeuvrability, and the high strength stainless steel alloy gives excellent durability and corrosion resistance. A shock-absorbing rubber bushing and galvanic isolation make it a matched fit for the DPR high-speed drive. This number supplies the complete GR9 pair, front propeller 3863505 and rear propeller 3863506. 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

Typically suits:

• Volvo Penta D6-370A-C
• Volvo Penta D4-300A-C
• Volvo Penta D4-300A-D
• Volvo Penta D4-300A-E
• Volvo Penta D6-370A-D
• Volvo Penta D6-370A-E
• Volvo Penta D6-400A-E
• Volvo Penta DPR-A
• Volvo Penta DPR-C
• Volvo Penta DPR-D
• Volvo Penta DPR-B

• Engine Family: D, DPR
• HP Range: 300-400 HP

⚙️ Key Features

• Size GR9, complete front and rear set
• Stainless steel Type GR for DPR drives
• Developed for the DPR drive used with D4 and D6 engines
• 16.47 kg
• Sold singly as front 3863505 and rear 3863506
• High-performance blade geometry, great strength, thin blades.
• Excellent durability and corrosion resistance.
• Shock-absorbing rubber bushing reduces vibrations and stress on the drivetrain.
• Galvanic isolation protects the drive from corrosion caused by the propellers.
• Three-blade front propeller and three-blade rear propeller.
• Material: stainless steel
• Fits: DPR
• Type: GR9
• Set contains: front 3863505, rear 3863506

🔌 Function

Contra-rotating propeller pair that converts engine power into thrust, the rear wheel recovering the swirl left by the front.

⚠️ Common Signs of Failure

• Vibration through the hull that grows with speed
• Blade edges chipped, curled or bent
• Loss of top speed or the engine over-revving
• Grooved or frosted blade faces from cavitation
• Hub slipping so revs rise without thrust

🛠️ Service Notes

• If only one wheel is damaged, order the front 3863505 or the rear 3863506 rather than the whole set
• Only 181 grams separate this set from the GR8 set 3863493, so weight is no guide - order by the GR size marking
• Check the shaft splines, the seals and the propeller locking hardware while the wheels are off
• Installation hardware, type GR: rear propeller nut 3863213 and front propeller nut 3863211.

📦 Condition

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