Sierra Marine Oil Filter 20 Micron Filtration 18-7897

The Sierra Marine Oil Filter 18-7897 is a popular choice for owners of various outboard motors, offering high-performance filtration without reaching the extremely fine filtration of a 20-micron filter. Here's a breakdown of its key features and compatibility information:

Micron Rating:

While information about the specific micron rating of the 18-7897 is not explicitly mentioned, it likely does not offer 20-micron filtration. Sierra Marine oil filters are typically designed to meet or exceed OEM (Original Equipment Manufacturer) specifications. The micron rating of the 18-7897 would depend on the OEM filter it replaces for specific engines.

Features:

High-Efficiency Media: Effectively filters contaminants like dirt, metal shavings, and soot from your engine oil, meeting or exceeding OEM specifications. This protects your engine from wear and tear, leading to better performance and extended lifespan.
Durable Construction: Built with premium materials to withstand the harsh marine environment and ensure reliable performance. Sources mention features like a heavy-wall steel canister and epoxy coating for corrosion resistance.
Spin-On Design: Allows for easy installation and removal during oil changes.
Anti-Drain Back Valve (Possible): Some sources mention an anti-drain back valve that prevents oil from draining back into the engine when the filter is removed, simplifying oil changes.
Compatibility:

The Sierra 18-7897 is designed as a replacement filter for various outboard engine models, including:

Johnson/Evinrude 140 HP outboard motors (2003 and later)
Replaces Johnson/Evinrude OEM filter models 778887, 5033919
Replaces Mallory outboard filter model 9-57815
Suzuki outboard engines (compatibility with specific models needs verification)