Suzuki DF40 / DF50 Engine Control Unit (ECU/ECM) | OEM ECU | Fits 1999–2010 Suzuki & Johnson DF40 / DF50 4-Stroke | 1-Year Warranty

Product Overview

Restore reliable engine performance with this genuine OEM Suzuki Engine Control Unit (ECU/ECM), designed for 1999–2010 Suzuki DF40 and DF50 4-stroke outboards, including Johnson and Evinrude models built by Suzuki. Professionally tested on the engine and verified with a CDI diagnostic tester, this ECU is ready to install and backed by a 1-Year Warranty. Removed from a Johnson E50PL4EES (Suzuki DF50 platform), this ECU has accumulated 957.4 operating hours with no active fault codes recorded. The diagnostic report is included for added buyer confidence.

---

Key Features

• Genuine OEM Suzuki Engine Control Unit (ECU/ECM)
• Fits Suzuki DF40 and DF50 4-stroke outboards
• Compatible with Johnson/Evinrude Suzuki-built 40 HP and 50 HP models
• Fits 1999–2010 applications
• Engine-tested and CDI diagnostic tested
• Diagnostic report included
• No active fault codes
• Clean connectors and undamaged housing
• Ready for installation
• Includes a 1-Year Warranty

---

Technical Specifications

Specification	Details
Brand	Suzuki
Product Type	Engine Control Unit (ECU/ECM)
Condition	Used – Professionally Tested
Engine Type	4-Stroke
Horsepower	40 HP / 50 HP
Model Years	1999–2010
Warranty	1-Year

---

Part Numbers

Primary Part Number

• 33920-87J13

Also Replaces

• 33920-87J12
• 33920-87J11
• 33920-87J10

Always verify your existing ECU part number before ordering.

---

Condition

This ECU has been professionally tested and inspected to ensure reliable performance. Condition highlights include:

• Tested on a running engine
• Verified with a CDI diagnostic tester
• Diagnostic report included
• 957.4 engine hours recorded
• No active fault codes
• Connector pins clean and undamaged
• Wiring intact
• No visible cracks or physical damage
• Ready to install

---

Compatible Applications

Fits select Suzuki and Suzuki-built Johnson/Evinrude outboards including:

Suzuki Models

• DF40
• DF50

Johnson / Evinrude Models

• Suzuki-built 40 HP & 50 HP four-stroke outboards using the same ECU part numbers

Model Years

• 1999
• 2000
• 2001
• 2002
• 2003
• 2004
• 2005
• 2006
• 2007
• 2008
• 2009
• 2010

Donor Engine: Johnson E50PL4EES (Suzuki DF50 platform) Always verify compatibility using your engine model, serial number, and ECU part number before purchasing.

---

What's Included

Your purchase includes:

• Genuine OEM Suzuki Engine Control Unit (ECU/ECM)
• CDI diagnostic report

Everything shown in the product photos is included.

---

Warranty

This ECU includes a 1-Year Warranty from Southcentral Outboards. If the unit fails during normal operation within one year of purchase, it will be replaced. If a replacement is unavailable, a full refund will be provided.

---

Returns

Returns are accepted under the following conditions:

• 30-Day Free Returns if the item is listed incorrectly.
• 60-Day Returns for any other reason, with buyer responsible for return shipping and applicable restocking fees where appropriate.

Please contact us before opening an eBay return so we can assist you.

---

Shipping Information

Your ECU will be carefully packaged to protect the electronic components during shipping. Shipping is available throughout the United States, with international shipping available upon request.

---

Why Buy from EZ Boats Marine?

• Genuine OEM Suzuki Marine Parts
• Engine-Tested and CDI Diagnostic Verified
• Diagnostic Report Included
• Ready to Install
• Fast & Secure Shipping
• Expert Technical Support
• 1-Year Warranty
• Trusted Marine Parts Supplier

EZ Boats Marine is committed to supplying premium-quality OEM marine components backed by dependable customer service and technical expertise.

---

Frequently Asked Questions

Is this an OEM Suzuki ECU?

Yes. This is a genuine OEM Suzuki Engine Control Unit that also fits compatible Johnson and Evinrude outboards manufactured by Suzuki.

Which engines does it fit?

It fits select 1999–2010 Suzuki DF40 and DF50 4-stroke outboards, as well as compatible Johnson/Evinrude Suzuki-built 40 HP and 50 HP models. Always verify compatibility using your engine model, serial number, and ECU part number.

Has the ECU been tested?

Yes. The ECU has been:

• Tested on a running engine
• Verified using a CDI diagnostic tester
• Confirmed with 957.4 operating hours
• Verified to have no active fault codes

A diagnostic report is included with the purchase.

What condition is it in?

The ECU features:

• Clean connector pins
• Intact wiring
• No visible physical damage
• Ready for installation

Does it include a warranty?

Yes. It is backed by a 1-Year Warranty covering failure during normal operation.

Can EZ Boats Marine verify compatibility?

Absolutely. Send us your engine's model number, serial number, and existing ECU part number, and we'll confirm whether this OEM Suzuki 33920-87J13 Engine Control Unit (compatible with 33920-87J12, 33920-87J11, and 33920-87J10) is the correct replacement before you purchase.