Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)
Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

Vendor: JLM Marine
Availability: In Stock
$12.99
$15.00
$12.99
Subtotal: $12.99

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Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

$15.00 $12.99
Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

$15.00 $12.99
Description

Lower Unit Gear Oil Pump – Fits Most Marine Outboard Motors (Multiple Adapters)

This lower unit gear oil pump is designed to fit standard quart bottles with 28mm openings and works with most marine outboard motors, excluding Volvo Penta. It includes multiple adapters to provide compatibility across a wide range of popular outboard brands.

Direct Replacements: Similar to Slippery Pete Lower Unit Gear Oil Pump, RETEPIF Lower Unit Gear Oil Pump, Bentolin Lower Unit Gear Oil Pump

  • Adapters included: 3/8" swivel, 8mm, and 10mm metal adapters
  • Compatible with: Most outboard motors from Mercury, Yamaha, Nissan, Tohatsu, Honda, Johnson/Evinrude
  • Installation: Direct thread onto standard quart bottles (28mm opening)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number Superseded By Notes
Mercury/Mariner 3/8" swivel adapter compatibility
Yamaha 10mm-1.25 male adapter compatibility
Nissan 10mm-1.25 male adapter compatibility
Tohatsu 10mm-1.25 male adapter compatibility
Honda 8mm-1.25 male adapter compatibility
Johnson/Evinrude 8mm-1.25 male adapter compatibility
Volvo Penta Not compatible

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury/Mariner Most outboard models Various 2-Stroke & 4-Stroke All N/A 3/8" swivel adapter compatibility
Yamaha Most outboard models Various 2-Stroke & 4-Stroke All N/A 10mm-1.25 male adapter compatibility
Nissan Most outboard models Various 2-Stroke & 4-Stroke All N/A 10mm-1.25 male adapter compatibility
Tohatsu Most outboard models Various 2-Stroke & 4-Stroke All N/A 10mm-1.25 male adapter compatibility
Honda Most outboard models Various 2-Stroke & 4-Stroke All N/A 8mm-1.25 male adapter compatibility
Johnson/Evinrude Most outboard models Various 2-Stroke & 4-Stroke All N/A 8mm-1.25 male adapter compatibility
Volvo Penta All models N/A N/A N/A N/A Not compatible

Technical Specifications

Specification Value
Product Type Lower Unit Gear Oil Pump
Installation Direct thread onto standard quart bottles (28mm opening)
Connection Multiple adapters: 3/8 inch metal swivel, 8mm and 10mm metal adapters
Housing Material Plastic and aluminum
Flow Rate 8-10cc per pump stroke
Compatibility Most marine outboard motors (not compatible with Volvo Penta)
Included Adapters 3/8" swivel adapter, 8mm male adapter, 10mm male adapter
Hose Type Flexible discharge hose
Bottle Compatibility Standard quart bottles with 28mm openings
Application Lower unit gear oil refilling

Package Contents

  • 1 x Lower Unit Gear Oil Pump
  • 1 x 3/8" Metal Swivel Adapter
  • 1 x 8mm Metal Adapter
  • 1 x 10mm Metal Adapter
  • 1 x Short Suction Tube
  • 1 x Long Suction Tube
  • 1 x Flexible Discharge Hose

Installation Guide

  1. Drain old oil from your lower unit by removing both drain plugs (upper and lower).
  2. Attach the appropriate adapter to the pump based on your engine brand.
  3. Screw the pump assembly onto a standard quart bottle of gear oil.
  4. Insert the adapter into the lower drain hole of your engine.
  5. Pump oil into the lower unit until it begins to flow out of the upper vent hole.
  6. Quickly replace the upper vent plug, then remove the pump and replace the lower drain plug.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
Check the compatible engine models table for brand and model fitment. Use the provided brand-specific serial number guides to verify your engine details before purchase.

Q: How often should I replace the gear oil pump?
Replacement is generally needed when the pump shows signs of wear or leaks. Regular inspection during maintenance is recommended.

Q: Can I use this pump with Volvo Penta engines?
No, this pump is not compatible with Volvo Penta models.

Q: How does this aftermarket pump compare to OEM?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

About JLM Marine

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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