The Lamb Boat & Engine Company of Clinton, Iowa built a 1,559 cu in (25.55 L) (5.25 in × 6 in (133 mm × 152 mm)) engine for the company's 32-foot Lamb IV. It weighed in at 2,114 pounds (959 kg). No weight is known for the massive 3,464 cu in (56.76 L) (7 in × 7.5 in (178 mm × 191 mm)) F-head engine built by the Orleans Motor Company.