ARCO Part #3424ARCO NEW OEM Premium Replacement Outboard StarterFits: Yamaha and Mariner 55-60 HP 2-Cyl, 2 Stroke Engines,9-tooth drive gear.Replaces Part Numbers: Mariner 50-97072M Mariner 50-97072T Mercury 50-81490M Mercury 50-92669M Mercury 50-97072M Mercury 50-97072T Yamaha 697-81800-10 Yamaha 697-81800-11 Yamaha 697-81800-12 Yamaha 99999-03249Hitachi S114-221 Hitachi S114-221E Hitachi S114-221F Hitachi S114-221G Hitachi S114-221H Hitachi S114-221JSIERRA 18-6412QUALITY ASSURANCE Epoxy Powder coated for maximum corrosion protection Motor shafts induction case hardened at bearing surfaces for superior wear resistance PRECISION TESTING All armatures tested to withstand 50 times operation voltage (12V) All motors performance tested at 5 different load levels All motors must meet or exceed OEM performance before being boxedARCO ASSURANCE WARRANTYWe believe that the best warranties are the ones you never have to use. However, if we determine an ARCO product to be defective under proper instillation and utilization conditions, we are obligated to replace or repair the product or issue a refund of the purchase price. Should a customer endure additional labor costs for a professional installation, ARCO will reimburse said customer. We stand behind our product and its quality.ARCO Marine is a USA based manufacturer located in Pensacola FL. Established in 1960, we were pioneers in the O/E replacement parts segment and have a reputation synonymous with premium quality and part reliability. We over engineer our parts to exceed and outlast O/E standards, often times engineering out any part deficiencies. We use only the best input components and every part that ships out of our warehouse has been tested prior to boxing which provides us with some of the lowest failure rates in the marine engine parts industry. In stock! Usually ships within 24 hours.