# SDEC D683 Marine Diesel Engine (320 HP)

> SDEC D683 Marine Diesel Engine (320 HP). The SDEC D683 is an inline 6-cylinder, turbocharged water-cooled marine diesel engine built for inboard boat…

- URL: https://www.marine-equipment-supply.com/products/diesel-engines/sdec-d683-marine-diesel-engine-320-hp/
- Category: [Diesel Engines](https://www.marine-equipment-supply.com/products/diesel-engines/)
- Brand: SDEC
- Supplier: Shanghai Mars Industrial Co., Ltd. (MARS), Shanghai, China
- Price: on request — [request a quote](https://www.marine-equipment-supply.com/contact/) · WhatsApp +86 176 2154 1688 · inquiry@marine-equipment-supply.com

## Overview

The SDEC D683 is an inline 6-cylinder, turbocharged water-cooled marine diesel engine built for inboard boat propulsion. Delivering 320 HP at 2200 rpm from an 8.3 L displacement, it provides strong, dependable power for workboats, fishing vessels, and commercial craft, with reliable sea-water and heat-exchanger cooling.

## Key selling points

- Strong 320 HP @ 2200 rpm output for dependable marine propulsion
- Turbocharged for higher output and better fuel efficiency
- Sea-water pump & heat-exchanger cooling for stable marine operation
- Durable inline-6, 8.3 L design for smooth, reliable performance at sea

## Technical specifications

| Parameter | Value |
| --- | --- |
| Model | D683 |
| Engine type | Inline 6-cylinder, 4-stroke, turbocharged, water-cooled marine diesel |
| Rated power / speed | 320 HP @ 2200 rpm |
| Displacement | 8.3 L |
| Bore × Stroke | 114 × 135 mm |
| Cooling system | Sea-water pump & heat exchanger |
| Engine position | Inboard |
| Application | Boat / marine |
| Warranty | 1 year or 1500 hours |
| MOQ | 1 |

## Features & highlights

The D683 combines a rugged inline-6 block with a turbocharger for higher power and better fuel efficiency by compressing intake air. Marine cooling is handled by a sea-water pump and top-mounted heat exchanger for stable operating temperatures during demanding duty, while a precise injection pump with high-pressure fuel lines and a durable belt-driven front accessory system (alternator, water pump) ensure reliable power at sea.

## Typical applications

Inboard propulsion for workboats, fishing vessels, and commercial marine craft.

## Customization options

Available with marine transmission/gearbox options to suit specific vessel requirements. Please contact us with your application details.

## Ordering information

- MOQ: 1 unit
- Warranty: 1 year or 1500 hours
- Brand-new and genuine SDEC; lead time and packaging details available on request

## FAQ

### What is the SDEC D683 Marine Diesel Engine used for?

Inboard propulsion for workboats, fishing vessels, and commercial marine craft.

### What warranty comes with the SDEC D683 Marine Diesel Engine?

The SDEC D683 Marine Diesel Engine is supplied with a 1 year or 1500 hours warranty. The exact warranty terms are confirmed on your quotation.

### What is the minimum order quantity?

The minimum order quantity for the SDEC D683 Marine Diesel Engine is 1. Mixed orders with other MARS products are welcome.

### Can the SDEC D683 Marine Diesel Engine be customized?

Available with marine transmission/gearbox options to suit specific vessel requirements.Please contact us with your application details.

### How is it inspected, packed and shipped?

Each unit is checked against your order before dispatch, with a written outgoing-inspection report and video (machinery is run-tested). Goods are packed in export wooden-box or crate packing and shipped FOB or CIF from Shanghai; stock items ship promptly and built-to-order items typically within about 20 working days.

### How do I get a price for the SDEC D683 Marine Diesel Engine?

Send an inquiry with the required configuration, quantity and destination port using the form on this page, email inquiry@marine-equipment-supply.com or WhatsApp +86 176 2154 1688. We reply with a matched recommendation and quotation within 24 hours on working days.