M806418 Engine Oil Filter (Replacement Part) is an OEM standard oil filter specifically designed for small to medium-power engines. It emphasizes high compatibility and reliable lubrication system protection, widely used in lawn equipment, utility vehicles, and compact tractors.
As the"core guardian"of the engine lubrication system, M806418 employs multiple design features to ensure oil cleanliness and engine protection, with the following key characteristics:
High-Efficiency Filtration, Intercepting Contaminants
Utilizes a “natural cellulose + synthetic fiber” composite filter media with 20-25 micron filtration precision. Effectively traps contaminants like metal particles, dust, and carbon deposits in engine oil, preventing them from circulating and wearing critical moving components such as pistons and crankshaft journals.

Dry-start protection, reducing cold-start wear
An internal nitrile rubber check valve retains oil within the filter and oil passages after shutdown. This eliminates the need to “wait for oil to fill” during subsequent starts, providing immediate lubrication to the engine and significantly reducing “dry friction” damage during cold starts.

Pressure Protection Prevents Oil Starvation
An integrated pressure relief bypass valve activates at a preset pressure (approximately 8-10 psi) when oil flow is insufficient due to clogged filter elements from prolonged use or increased oil viscosity in cold conditions. This ensures oil bypasses the filter and enters the lubrication system, preventing severe engine failures like cylinder scoring or bearing seizure caused by oil starvation.

Sturdy Construction for Harsh Conditions
The housing is stamped from cold-rolled steel plate with a rust-resistant coating, withstanding high engine operating temperatures (up to 120°C oil temperature) and vibration. The metal end caps are sealed to the filter core body with high-strength adhesive, preventing oil leakage or unfiltered oil bypassing the system.