Sierra 18-7897 4-Cycle Outboard Oil Filter – Suzuki DF115/DF140 & Johnson/Evinrude

Sierra 18-7897 4-Cycle Outboard Oil Filter – Suzuki DF115/DF140 & Johnson/Evinrude

Part Number: 18-7897  |  SKU: 47-7897  |  UPC: 808282186418

The Sierra 18-7897 is a spin-on oil filter for selected Suzuki DF-series and Johnson/Evinrude 4-stroke outboard engines. It uses a 3/4‑16 thread, heavy-wall steel canister with epoxy corrosion protection, high-efficiency filter media, and an anti-drain-back valve that helps retain oil pressure between uses and reduces dry-start conditions on startup.

Key Specifications

• Thread: 3/4‑16
• Filter type: 4-cycle outboard spin-on oil filter
• Anti-drain-back valve: Yes
• Canister: Heavy-wall epoxy-coated steel
• Filter media: High-efficiency, meets or exceeds OEM specification
• Marine-duty construction for freshwater and saltwater environments

Compatible Applications

• Suzuki DF115 4-stroke outboards, approximately 2002–2012 (verify by serial number)
• Suzuki DF140 4-stroke outboards, approximately 2002–2012 (verify by serial number)
• Johnson 90 HP 4-stroke outboards, selected 2003–2006 models
• Johnson 115 HP 4-stroke outboards, selected 2003–2006 models
• Johnson 140 HP 4-stroke EFI outboards, selected 2003–2006 models
• Evinrude 140 HP 4-stroke EFI outboards, selected 2003–2006 models

Fitment Note: Sierra 18-7897 and Sierra 18-7896 both cover Suzuki DF-series and Johnson/Evinrude 4-stroke outboards, but serve different engine serial number ranges. Always confirm your engine model, model year, and existing filter part number before ordering. Matching Suzuki 16510-82703 or Johnson/Evinrude 5033919 / 778887 is the most reliable fitment method.

Service Interval

Replace at every scheduled engine oil service. Follow the outboard manufacturer’s recommended interval for your specific engine model — typically every 100 hours or once per season, whichever comes first.

Installation Notes

• Remove the old filter and confirm the old gasket has come away with it — a retained gasket will cause an oil leak
• Clean the filter mounting surface
• Lightly coat the new filter gasket with fresh engine oil before threading it on
• Tighten by hand plus ¾ turn, or per engine manufacturer specification — do not over-tighten
• Run the engine and inspect for leaks before returning to service

OEM & Cross-Reference Part Numbers

• Sierra: 18-7897
• Suzuki: 16510-82703
• Johnson / Evinrude: 5033919, 778887
• Mallory: 9-57815
• EMP: 35-57815

Related Products

• Sierra 18-7896 4-Cycle Outboard Oil Filter – Suzuki DF-Series & Johnson/Evinrude — closely related filter for different Suzuki/J&E serial ranges
• Seachoice 50-21019 Full-Flow Oil Filter – 20 Micron — value alternative for Suzuki DF115/DF140 & Johnson/Evinrude 4-stroke
• Sierra 7901 4-Cycle Outboard Oil Filter
• Sierra 7914 4-Cycle Outboard Oil Filter
• Sierra 7916 4-Cycle Outboard Oil Filter

Parts Desk Insights

Best Use Case: Routine oil and filter changes on Suzuki DF115 and DF140 4-stroke outboards and selected Johnson/Evinrude 4-stroke EFI applications in the 90–140 HP range, primarily 2002–2012 production years. The Suzuki DF115 and DF140 are widely used mid-to-large outboard engines on aluminum fishing boats and walkarounds, making this a frequently serviced filter for shops carrying Suzuki parts.

Common Issues: The most important distinction to communicate is the difference between Sierra 18-7897 and Sierra 18-7896 — both cover very similar Suzuki DF and Johnson/Evinrude 4-stroke applications but serve different engine serial number ranges. If a customer is unsure which they need, ask for their engine’s model year and serial number. The strongest quick fitment check is Suzuki 16510-82703 or Johnson/Evinrude 5033919 / 778887. As always, remind customers to confirm the old gasket comes off with the old filter to avoid post-service oil leaks.