Part 13331-357-000, Flywheel Key, is a genuine OEM part manufactured by Honda. The manufacturer describes it as "KEY (25X18)". Honda flywheel key. The flywheel key aligns the flywheel in the correct position on the crankshaft. If the engine stops suddenly due to hitting a hard object, the flywheel key shears in half to prevent damage to the engine. If the flywheel key is broken, the engine won't start. It is used in Briggs & Stratton Pressure Washers. Find appliance parts, lawn & garden equipment parts, HVAC parts and more from the top brands in the industry.