# 3863504 Propeller | 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 is the GR8 rear propeller; the matching front propeller is 3863503, and the pair is also listed as set 3863493. 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 GR8, rear position
-   Stainless steel Type GR for DPR drives
-   8.48 kg
-   Matching front is 3863503; the complete GR8 set is 3863493
-   11 applications across the D and DPR series
-   3-blade
-   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: GR8
-   Set contains: set 3863493, front 3863503

## 🔌 Function

Rear wheel of the contra-rotating Duoprop pair, recovering the swirl left by the front propeller and turning it into extra thrust.

## ⚠️ 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
-   Splines worn or picked up on the hub bore

## 🛠️ Service Notes

-   Only 46 grams separate this from the GR9 front 3863505, so the published weight cannot even tell a front from a rear across sizes - order by the GR marking and the position
-   Where both wheels are damaged, the GR8 set 3863493 covers the pair
-   Grease the splines lightly and fit new locking hardware
-   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

## Details

- **Price:** 2143.77 AUD
- **Vendor:** Volvo Penta
- **Type:** Propellers
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2143.77 AUD | In stock |

## Images

- 3863504 Propeller | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3863504-propeller-genuine-volvo-penta)
> Updated: 2026-10-09