Description

Mercury MerCruiser Quicksilver 48452 is a genuine OEM quad ring used specifically as the oil release check valve seal in older Mercury MerCruiser sterndrive assemblies. Current Mercury dealer and diagram references identify part 48452 as QUAD RING, OIL RELEASE CHECK VALVE, which makes the SKU more precise than the generic “quad ring” description alone.

Key Features

• Genuine Mercury Marine OEM part number 48452.
• Officially identified in current parts diagrams as QUAD RING, OIL RELEASE CHECK VALVE.
• Used with the related oil release check valve 48219 and tension spring 48442 in the same service area.
• Current dealer listing shows GTIN 745061079915.
• Current shipping-spec listing shows approximate packaged size of 1.13 x 1.13 x 0.50 in and weight of 0.02 lb.

Engine Compatibility

The strongest supportable fitment for 48452 is older Mercury MerCruiser sterndrive and racing drive assemblies, not a broad engine-only application. Current where-used references show coverage including Alpha One SS (1986–1989), III (1968–1972), SSM II/III/IV/V (1982–1995), 255-TRS, 280-TRS, II-TR, TR/TRS, and earlier electric-shift / performance stern drive families including 215E and 215H.

Serial Number Fitment Notice

Verify fitment by exact drive model, serial number, and the correct oil release check valve diagram before ordering. With 48452, the safest match is the specific check-valve sealing location in the drive or bell-housing assembly, because Mercury uses several different quad rings and sealing rings across nearby service areas.

When This Part Needs Replacement

This quad ring is typically replaced when the oil release check valve is leaking, hardened, damaged, or when the check-valve assembly is already apart for service. Because 48452 seals the oil release check valve itself, it is usually smarter to renew it during that repair than to reuse an aged seal in the same location. This service guidance is a practical inference based on its documented role in the oil release check valve assembly.

Installation Notes

Install 48452 only after confirming the exact Mercury MerCruiser diagram for the drive being serviced. Current parts breakdowns place it directly with the oil release check valve, tension spring, and check valve guide cover in the bell-housing / driveshaft-housing service area, so seal placement and surrounding part order should be checked carefully during reassembly.

Alternate/Superseded Part Numbers

Current sources reviewed show 48452 as the active OEM Mercury reference for this quad ring. The sources checked did not show a newer Mercury superseding part number for this seal.

Parts Desk Insight

This is a good example of why the SKU should lead the listing. Part 48452 is not just a generic quad ring — current Mercury diagrams tie it specifically to the oil release check valve — so matching by the exact part number and drive diagram is the safer move than ordering by seal shape alone.

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