Yamaha Jet Drive Complete Midsection & Swivel Bracket Assembly | OEM | Fits 1984–1993 Yamaha 40 & 50 HP Jet Drive Outboards

Product Overview

Restore your Yamaha Jet Drive outboard with this genuine OEM Yamaha Jet Drive Complete Midsection Assembly, designed for 1984–1993 Yamaha 40 HP and 50 HP Jet Drive outboards. This complete assembly includes the midsection, jet drive unit, swivel bracket, steering bracket, and transom brackets, providing an excellent replacement for damaged or worn factory components. Removed from a 1987 Yamaha 40SH-JD 40 HP Jet Drive, this OEM assembly has been professionally inspected and is in good working condition. The driveshaft bearing is in good condition, the reverse gate operates smoothly, and the intake grates are straight with only minor wear. The unit ships empty and requires gear oil prior to installation. Because Jet Drive applications can vary by model and serial number, always verify compatibility before purchasing.

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Key Features

• Genuine OEM Yamaha Jet Drive midsection assembly
• Complete midsection with jet drive
• Includes swivel bracket and transom brackets
• Professionally inspected
• Good driveshaft bearing
• Reverse gate operates properly
• Intake grates in good condition
• Removed from a freshwater 1987 Yamaha 40SH-JD
• Ready for installation
• OEM Yamaha quality

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Technical Specifications

Specification	Details
Brand	Yamaha
Product Type	Jet Drive Complete Midsection Assembly
Condition	Used – Professionally Inspected
Engine Type	Jet Drive Outboard
Horsepower	40 HP, 50 HP
Model Years	1984–1993

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OEM Part Numbers

Component	OEM Part Number
Upper Midsection Casing	6H4-45111-10-EK
Swivel Bracket	6H5-43311-04-EK
Starboard Bracket	6H4-43111-04-EK
Port Bracket	6H4-43112-04-EK
Steering Bracket	6H4-42510-02-EK

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Compatible Applications

Designed for select Yamaha Jet Drive outboards including:

Model Years

• 1984
• 1985
• 1986
• 1987
• 1988
• 1989
• 1990
• 1991
• 1992
• 1993

Horsepower

• 40 HP
• 50 HP

Engine Type

• Yamaha Jet Drive Outboards

Donor Engine

• 1987 Yamaha 40SH-JD 40 HP Jet Drive

Important: The year range listed applies primarily to the midsection assembly. Jet Drive components may vary depending on model and serial number. Always verify compatibility using your engine's model, serial number, and OEM part numbers before purchasing. If you're unsure, EZ Boats Marine will gladly assist with fitment verification.

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Condition

This Yamaha Jet Drive Complete Midsection Assembly has been professionally inspected and is in good used condition. Inspection highlights include:

• Removed from a 1987 Yamaha 40SH-JD Jet Drive
• Professionally inspected
• Includes complete midsection and jet drive assembly
• Driveshaft bearing in good condition
• Reverse gate operates normally
• Intake grates are mostly straight with minor wear
• Ready for installation
• Ships without lubricant—gear oil must be added before use

Please review all product photos carefully before purchasing.

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What's Included

Your purchase includes:

• Upper Midsection Casing
• Complete Jet Drive Assembly
• Swivel Bracket
• Steering Bracket
• Port Transom Bracket
• Starboard Transom Bracket

Only the components shown in the product photos are included.

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Shipping Information

This complete jet drive assembly will be securely packaged to protect it during transit. We offer fast shipping throughout the United States, with international shipping available upon request. For an accurate shipping quote, please provide:

• Country
• ZIP or Postal Code
• Residential or Commercial Address
• Whether liftgate service is required

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Why Buy from EZ Boats Marine?

• Genuine OEM Yamaha Marine Parts
• Professionally Inspected Components
• Complete Jet Drive Midsection Assembly
• Honest Condition Descriptions
• Fast Nationwide & International Shipping
• Secure Packaging
• Experienced Marine Parts Specialists
• Dedicated Customer Support

EZ Boats Marine is committed to supplying premium OEM marine parts backed by expert service and dependable customer support.

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Frequently Asked Questions

Is this a genuine Yamaha Jet Drive assembly?

Yes. This is an original OEM Yamaha Jet Drive Complete Midsection Assembly removed from a 1987 Yamaha 40SH-JD outboard.

What is included?

The assembly includes the upper midsection casing, jet drive unit, swivel bracket, steering bracket, and port and starboard transom brackets as shown in the listing photos.

What condition is the assembly in?

The assembly has been professionally inspected. The driveshaft bearing is in good condition, the reverse gate operates properly, and the intake grates are mostly straight with normal cosmetic wear.

Which outboards does it fit?

It fits select 1984–1993 Yamaha 40 HP and 50 HP Jet Drive outboards. Because Jet Drive applications vary, always verify compatibility using your engine's serial number and OEM part numbers before ordering.

Are returns accepted?

Due to the nature of this assembly, returns are not accepted for incorrect purchases. Please verify compatibility before ordering. If you need assistance, simply send EZ Boats Marine your Yamaha engine's model and serial number, and we'll be happy to confirm whether this complete OEM Jet Drive Midsection Assembly is the correct fit.