Description

Mercury MerCruiser Quicksilver 25-25007 is a genuine Mercury Marine O-ring used as a small sealing ring in supported Mercury, Force, and MerCruiser-related assemblies. Cross-reference listings commonly identify this as a shift pin / gear shift arm pin rubber O-ring, with a size reference of 0.215 in. / 5.5 mm I.D. and 0.065 in. / 1.7 mm width. It is used where the parts diagram specifically calls for 25-25007 / 25007.

Key Features

• Genuine Mercury Marine / Quicksilver O-ring reference
• Commonly described as a shift pin / gear shift arm pin O-ring
• Size reference: 0.215 in. / 5.5 mm I.D.
• Width reference: 0.065 in. / 1.7 mm
• OEM part number: 25-25007
• Base part reference: 25007
• GTIN / UPC reference: 745061131477
• Catalog package reference: approximately 0.75 in. x 0.75 in. x 0.75 in.
• Catalog weight reference: approximately 0.02 lb

Engine Compatibility

This O-ring is shown in Mercury parts references for select 40 HP, 50 HP, 70 HP, 75 HP, 90 HP, 120 HP, and 150 HP applications depending on model year and serial number range. It is also shown in trim / tilt / lift systems and components from 1994 and newer, and in Force-related 75 / 90 HP application references.

Serial Number Fitment Notice

O-ring fitment depends on the exact engine, drive, trim/tilt assembly, shift linkage location, and serial number range. Always confirm compatibility using the Mercury or MerCruiser serial number and the exact parts diagram before ordering, especially because this small O-ring appears in more than one component group.

When This Part Needs Replacement

Replace this O-ring whenever the related shift pin, gear shift arm, trim/tilt component, or sealing location is serviced, or if the original O-ring is flattened, cut, swollen, hardened, cracked, missing, or no longer sealing properly.

Installation Notes

Clean the O-ring groove and mating surface before installation. Lightly lubricate the O-ring with the service-manual-approved lubricant where specified, and make sure it seats evenly without twisting or pinching. Confirm the exact diagram callout before installation because this part is small and easy to confuse with similar Mercury O-rings.

Alternate/Superseded Part Numbers

• 25-25007
• 25007
• 25-F498618
• F498618
• F498619
• 26-817469
• 27-843672
• 25-38933 — related interchange reference in supported applications
• Sierra 18-7120
• GLM 80090
• Mallory 9-76526
• Johnson / Evinrude 307853
• OMC 332598

Parts Desk Insight

This is a very small O-ring, but the diagram location matters. If it is being used on a shift pin or trim/tilt component, replacing it while the assembly is already apart is usually better than reusing an old flattened seal.

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