Mercury Genuine (1.859 x .139) O-Ring - 25-30224

25-30224 - Genuine Mercury (1.859 x .139) O-Ring

For Mercrusier MCM and MIE GM based V6 and V8 thermostat hoysings with flat cover plate

Also found on Mercury outboards below water pump base

Replaces - 18-7173-9, 82250, 310327, 9-76501 and 30224Q

Superseded by - 8M0204651