Home / Lawn & Garden / Parts / Lawn & Garden Equipment Engine 631890 Lawn & Garden Equipment Engine 631890$2.16 Price may not be up-to-date. In Stock View Product Part Number: 631890 Brand: CENTRAL POWER (TECUMSEH) Seller: Sears PartsDirect Categories: Lawn & Garden, Parts Not Returnable Description This engine (part number 631890) is for lawn and garden equipment. Engine 631890 is a complete replacement engine. Wear work gloves to protect your hands when installing this part.