Description

Mercury / MerCruiser Quicksilver Gear Lube Pump — 8M0072135

The Mercury Quicksilver 8M0072135 Gear Lube Pump is a genuine OEM hand-operated pump designed to fill lower units and sterndrive gearcases with gear oil directly from a bottle. It threads onto standard gear-lube bottles and connects to the gearcase drain port to allow clean, controlled filling during maintenance.

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Key Specifications

• Part Number: 8M0072135 (also listed as 91-8M0072135)

• Type: Hand-operated gear-lube pump

• Compatibility: Fits 1-quart and 1-liter gear-lube bottles

• Drain Plug Fit:3/8-16 threaded fitting

• Adapter Included:M8 × 1.25 metric adapter for some gearcases

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Compatible Applications

Used for servicing nearly all:

• Mercury outboards

• Mariner outboards

• MerCruiser sterndrives

The pump connects directly to the gearcase drain/fill hole so oil can be pumped upward from the bottle into the lower unit.

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Function

The pump allows technicians to:

• Fill the lower unit / gearcase with gear oil from the bottom up

• Prevent air pockets inside the gearcase

• Reduce spills and mess during gear-lube changes

This method is the standard procedure when servicing marine gearcases.

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Typical Maintenance Use

During a gearcase oil change:

1. Remove the bottom drain screw.

2. Attach the gear lube pump fitting to the drain hole.

3. Pump gear oil until it appears at the upper vent hole.

4. Reinstall the vent screw and then remove the pump.

This ensures the gearcase is completely filled.

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Works with almost every Mercury outboard and MerCruiser drive that uses 3/8-16 drain plugs.

Shipping:

OEM parts ship same or next day for fast Canada wide shipping.

Technical Specifications:

• Type: Hand-operated gear lube service pump
• Compatible with: Mercury MerCruiser sterndrive and outdrive units
• Part Number: 8M0072135
• Quantity: Sold individually (6-pack available)