# 3840663 Exhaust Riser | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta exhaust riser from the Inlet and Exhaust System group, weighing 5.897 kg and superseding part number 3809157. No engine applications are listed against it, so identify it by the old number. The companion riser 3840664 weighs 7.666 kg and supersedes 3809216, so the two are separated clearly by both weight and supersession.

## ⚙️ Key Features

-   5.897 kg
-   Supersedes 3809157
-   Inlet and Exhaust System group
-   Lighter of the two risers here, against 3840664

## 🔌 Function

Lifts the exhaust above the waterline and mixes cooling water into the gas flow before the hose run.

## ⚠️ Common Signs of Failure

-   Rust streaks, weeping or pinholes on the riser body
-   Water in a cylinder, or hydraulic lock on cranking after a layup
-   Exhaust or steam leaking at the joints
-   Gas passage choked with carbon and scale, causing high back pressure
-   Rough running or hard starting from water carryover

## 🛠️ Service Notes

-   Risers corrode internally where gas and salt water meet, so treat them as a life-limited item and inspect the bore on removal
-   Renew all gaskets, the water fitting seals and the fasteners, which are usually seized
-   Water reaching a cylinder through a failed riser can wreck an engine, so investigate any sign of water carryover before running

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3840663 → Supersedes 3809157 → Supersedes 3584477

### OEM / Related Numbers

-   3809157 earlier number superseded by this part
-   3584477 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 5401.25 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5401.25 AUD | In stock |

## Images

- 3840663 Exhaust Riser | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3840663-exhaust-riser-genuine-volvo-penta)
> Updated: 2026-08-22