Description
Sierra’s 18-7921 Oil Filter is engineered to deliver reliable oil filtration and engine protection for Mercury Verado inline 4-cylinder outboard engines ranging from 135 HP to 200 HP. It features an anti-drain-back valve to help maintain oil pressure at startup, reducing dry starts and supporting improved engine longevity. Constructed with a heavy-wall steel canister and epoxy coating, it provides enhanced corrosion resistance for long-lasting durability in harsh marine environments. The high-efficiency filter media meets or exceeds OEM filtration standards, ensuring consistent performance and dependable protection in high-output marine applications.
Features
- Anti-drain-back valve helps maintain oil pressure and reduce startup wear
- Heavy-wall steel canister with epoxy coating for corrosion resistance
- High-efficiency filter media meets or exceeds OEM filtration standards
- Designed for Mercury Verado inline 4-cylinder 135–200 HP outboard engines
- 24mm x 1.5 thread specification for secure and proper fitment
- Thread Spec: 24mm x 1.5
- Anti-Drain-Back Valve
- Engineered with premium grade materials that will excel in the extreme marine environment
- Epoxy coated for corrosion resistance
- Heavy-wall steel canister for further corrosion protection
- High-efficiency filter media that meets or exceeds the OE’s filtration






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