Mercury 8 9.9 HP Dressed Powerhead | OEM 8M0145937 | Fits Mercury 209cc 4-Stroke Outboards

Product Overview

Replace your worn or damaged engine with this genuine OEM Mercury Dressed Powerhead, designed for Mercury 8 HP and 9.9 HP 209cc 4-stroke outboards. This complete dressed long block has been professionally inspected and is ready to serve as a solid replacement for compatible Mercury engines. This OEM powerhead features 140 PSI compression on both cylinders, good spark, and clean cylinder walls with no scoring, indicating a healthy engine foundation. It is being sold complete as pictured and includes the dressed long block assembly. Due to age, we recommend rebuilding the carburetor before installation for optimal performance. Whether you're repairing a failed engine or restoring a dependable portable outboard, this genuine Mercury powerhead offers factory quality and proven reliability.

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Key Features

• Genuine OEM Mercury Dressed Powerhead
• Complete dressed long block assembly
• 140 PSI compression on both cylinders
• Good spark
• No scoring in the cylinders
• Fits Mercury 209cc 4-stroke engines
• Factory OEM replacement
• Professionally inspected
• Ready for installation after recommended carburetor rebuild

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Technical Specifications

Specification	Details
Brand	Mercury
Product Type	Dressed Powerhead
Condition	Used – Good Condition
OEM Part Number	8M0145937
Engine Type	4-Stroke
Displacement	209cc
Horsepower	8 HP / 9.9 HP
Compression	140 PSI (Both Cylinders)

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OEM Part Numbers

Primary Part Number

• 8M0145937

Also Replaces

• 895188T06
• 895188T04
• 8M0046065

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Compatible Applications

Designed for select Mercury outboards including: Horsepower

• 8 HP
• 9.9 HP

Engine

• Mercury 209cc 4-Stroke

Serial Number Range

• 0P325500 through 1R279944

Donor Engine

• Mercury 8 HP 4-Stroke
• Serial Number: 0R402895

Important: Always verify compatibility using your engine's serial number and OEM part number before purchasing. If you need assistance confirming fitment, contact EZ Boats Marine and we'll be happy to help.

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Condition

This Mercury dressed powerhead has been professionally inspected and is in good used condition. Inspection highlights include:

• Complete dressed long block
• 140 PSI compression on both cylinders
• Good spark
• No scoring in either cylinder
• Carburetor rebuild recommended before installation
• Sold as pictured
• Ready for installation following recommended service

Please review all photos carefully to evaluate the cosmetic condition before purchasing.

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What's Included

Your purchase includes:

• OEM Mercury Dressed Powerhead Assembly (8M0145937)

Only the components shown in the product photos are included.

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Shipping Information

Your powerhead will be securely packaged to help prevent shipping damage 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 Mercury Marine Parts
• Professionally Inspected Components
• Factory Fit and Performance
• Honest Condition Descriptions
• Fast Nationwide & International Shipping
• Secure Packaging
• Experienced Marine Parts Specialists
• Dedicated Customer Support

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

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Frequently Asked Questions

Is this a genuine Mercury part?

Yes. This is an original OEM Mercury dressed powerhead manufactured by Mercury Marine.

What condition is it in?

The powerhead is in good used condition with 140 PSI compression on both cylinders, good spark, and no cylinder scoring. We recommend rebuilding the carburetor before installation.

Which engines does it fit?

This powerhead fits select Mercury 8 HP and 9.9 HP 209cc 4-stroke outboards within serial number range 0P325500 through 1R279944. Always verify compatibility using your engine's serial number and OEM part number before ordering.

Is it ready to install?

Yes. The powerhead is complete and ready for installation after the recommended carburetor rebuild.

Can EZ Boats Marine verify fitment?

Absolutely. Simply send us your Mercury engine's model and serial number, and we'll confirm whether this OEM 8M0145937 Dressed Powerhead is the correct fit before you purchase.