The Piston (0.25) for 4 Stroke 9 HP (186FA) Diesel Power Tiller / Cultivator delivers a precise fit and reliable engine performance for demanding agricultural use. Crafted from high-strength materials, it ensures durability and optimal combustion in tough conditions. This oversize piston is ideal for engine overhauls, supporting smooth tiller and cultivator operation, and is engineered for easy installation and long service life for farmers and technicians.