# SDEC D683 (6CTA8.3-M220) Marine Diesel Engine (250-360 HP)

> SDEC D683 (6CTA8.3-M220) Marine Diesel Engine (250-360 HP). The SDEC D683 is a heavy-duty inline 6-cylinder, turbocharged and inter-cooled marine diesel…

- URL: https://www.marine-equipment-supply.com/products/diesel-engines/sdec-d683-6cta8-3-m220-marine-diesel-engine-250-360-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 a heavy-duty inline 6-cylinder, turbocharged and inter-cooled marine diesel engine built for inboard propulsion of tugboats, working boats, and vessels. With a rugged wet-cylinder-liner design and sea-water pump plus heat-exchanger cooling, it delivers strong, dependable power for demanding marine duty.

## Key selling points

- Strong 250-360 HP @ 2200 rpm output for demanding marine propulsion
- Turbocharged & inter-cooled for higher power density and efficiency
- Sea-water pump & heat-exchanger cooling for continuous marine operation
- Durable inline-6 wet-cylinder-liner design engineered for life at sea

## Technical specifications

| Parameter | Value |
| --- | --- |
| Model | D683 (6CTA8.3-M220) |
| Engine type | Inline 6-cylinder, 4-stroke, turbocharged & inter-cooled marine diesel |
| Rated power / speed | 250-360 HP @ 2200 rpm |
| Displacement | 8.3 L |
| Bore × Stroke | 114 × 135 mm |
| Cooling system | Sea-water pump & heat exchanger, wet cylinder liner |
| Engine position | Inboard |
| Dimensions (L×W×H) | 1404.9 × 837 × 1178.7 mm |
| Application | Tugboat, working boat, vessel |
| Warranty | 12 months or 1500 hours |
| MOQ | 1 |

## Features & highlights

The D683 combines a rugged inline-6 wet-liner block with a turbocharger and inter-cooler for cooler, denser intake air and stronger combustion. Marine cooling is handled by a sea-water pump and top-mounted heat exchanger for stable operating temperatures during continuous duty, while a corrosion-resistant, marine-ready build stands up to the harsh sea environment. The side injection pump, high-pressure fuel lines, and durable belt-driven accessory drive ensure smooth, reliable power at sea.

## Typical applications

Inboard propulsion for tugboats, working boats, and vessels in demanding marine service.

## 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: 12 months or 1500 hours
- Genuine SDEC; lead time and packaging details available on request

## FAQ

### What is the SDEC D683 used for?

Inboard propulsion for tugboats, working boats, and vessels in demanding marine service.

### What warranty comes with the SDEC D683?

The SDEC D683 is supplied with a 12 months 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 is 1. Mixed orders with other MARS products are welcome.

### Can the SDEC D683 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?

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.