OEM Suzuki 20" Long Shaft Lower Unit | Fits DT40 2-Cylinder 2-Stroke (1986–1998) | 12-Spline Driveshaft | As-Is

Product Overview

Replace your damaged gearcase with this genuine OEM Suzuki 20-inch Long Shaft Lower Unit, designed for Suzuki DT40 2-cylinder 2-stroke outboards produced from 1986 through 1998. This complete lower unit shifts smoothly and rotates freely without binding. It features a 19-7/8" driveshaft, 12-spline driveshaft, and 13-spline propeller shaft. The unit has light driveshaft spline wear and a small leak below the water pump base, causing it to fail a pressure test. Because of this, it is being sold As-Is, making it an excellent rebuildable core or repair project.

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Key Features

• Genuine OEM Suzuki lower unit
• Fits DT40 2-cylinder 2-stroke outboards
• 20-inch long shaft configuration
• Shifts properly and spins freely
• 12-spline driveshaft
• 13-spline propeller shaft
• Good candidate for rebuilding or repair
• OEM Suzuki gearcase housing

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Technical Specifications

Specification	Details
Brand	Suzuki
Product Type	Lower Unit / Gearcase
Engine Type	2-Stroke
Engine Configuration	2-Cylinder
Compatible Model	Suzuki DT40
Horsepower	40 HP
Model Years	1986–1998
Shaft Length	20" Long Shaft
Driveshaft Length	19-7/8"
Driveshaft Splines	12
Prop Shaft Splines	13
Condition	Used OEM – As-Is

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Condition

This OEM Suzuki lower unit has been inspected and evaluated. Condition includes:

• Shifts properly through all gears
• Propeller shaft spins freely without binding
• Light wear on driveshaft splines
• Small leak located below the water pump base
• Did not pass pressure test
• Gear oil is not included
• Sold As-Is

This unit is ideal for buyers looking for a rebuildable OEM lower unit or replacement housing.

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Fitment

Fits: Suzuki DT40

• 40 HP
• 2-Cylinder
• 2-Stroke
• Model Years: 1986–1998

Specifications

• 20" Long Shaft
• Driveshaft Length: 19-7/8"
• Driveshaft Splines: 12
• Propeller Shaft Splines: 13

Always verify compatibility using your engine model and serial number before purchasing.

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What's Included

Your purchase includes:

• Complete OEM Suzuki 20" Lower Unit

Only the components shown in the listing photos are included.

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Important Information

• Gear oil is not included.
• Oil must be added before operation.
• The unit has a small leak beneath the water pump base and will require repair before use.
• Sold as a rebuildable OEM lower unit.

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Returns

No Returns Accepted This lower unit is sold As-Is. Please verify compatibility before purchasing, as fitment is the buyer's responsibility. If you are unsure whether this lower unit fits your engine, contact us with your model and serial number before ordering.

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Shipping

Your lower unit will be securely packaged to protect the housing, driveshaft, and propeller shaft during transit. Fast shipping is available throughout the United States, with international shipping available upon request.

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Why Buy from EZ Boats Marine?

• Genuine OEM Suzuki Marine Parts
• Professionally Inspected Components
• Accurate Product Descriptions
• Secure Packaging
• Fast Shipping
• Knowledgeable Customer Support
• Trusted Source for New and Used Outboard Parts

EZ Boats Marine is committed to supplying quality OEM marine parts backed by dependable customer service.

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Frequently Asked Questions

Is this a genuine Suzuki lower unit?

Yes. This is an original OEM Suzuki lower unit removed from a compatible DT40 outboard.

What engines does it fit?

It fits Suzuki DT40 2-cylinder 2-stroke outboards manufactured between 1986 and 1998, subject to model and serial number verification.

What condition is it in?

The unit shifts and rotates properly, but it did not pass a pressure test due to a small leak below the water pump base. It is being sold as a rebuildable As-Is unit.

Is gear oil included?

No. Gear oil is not included and must be added after repairs and before operation.

Can this lower unit be installed immediately?

No. Because of the failed pressure test and leak, the unit should be repaired or rebuilt before installation.

Are returns accepted?

No. This lower unit is sold As-Is, and no returns are accepted. Please verify compatibility before purchasing.

Can EZ Boats Marine help verify compatibility?

Yes. Contact us with your engine model and serial number, and we'll help confirm whether this OEM Suzuki 20" Long Shaft Lower Unit is the correct replacement for your outboard.