Part Description: 1973-1977 Mercury 6434A1 Powerhead Engine Long Block Crankcase OEM 20 HP Part Number(s): 6434A1 Model(s): 1973-1977 Mercury Condition Description: Unknown condition Retail Price: Obsolete Part Details: Powerhead Engine Long Block - includes crankshaft, pistons, intake, and both block halves - there is compression but no pull handle was used to get that compression so not sure if the numbers are accurate or not - engine could be good and just needs new rings but also could have somewhat low compression so selling at a big discount This should fit: 1973 1200203 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1974 1200204 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1975 1200205 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1976 1200206 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1977 1200207 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1973 1200223 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1974 1200224 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1975 1200225 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1976 1200226 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1977 1200227 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1976 1200506 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1977 1200507 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1976 1200526 CYLINDER BLOCK AND CRANKCASE ASSEMBLY 1977 1200527 CYLINDER BLOCK AND CRANKCASE ASSEMBLY Our Mission: Our goal is to continue providing outstanding customer service with every order and to get you back on the water fast. Every effort is made to inspect and test every used part and provide an accurate description so that you can buy with confidence. We would be happy to try and answer all questions regarding any of our products. Please check out our online SpeedProMarine store for more performance, obsolete, and hard to find motor boat products. Customer Satisfaction: We are highly committed to ensuring you receive the highest satisfaction with every purchase and hope to earn positive feedback from all of our customers. However, if you have any problems, questions, or concerns about the merchandise you purchased, please contact us. Taxes: MS residents will be charged 7% sales tax. Shipping: We normally ship the day after your payment is received and cleared. If you purchase multiple items, then please allow us to send an invoice to send you a little on shipping. Unless otherwise stated, products will be shipped via FedEx or USPS. Contact seller for any items being shipped anywhere other than the lower 48 states for a shipping price quote. Additional shipping charges will apply to all places outside of the lower 48. Arrangements can be made to pick up item locally. Returns: Returns are allowed only if the item is defective or if we made a mistake in the listing. Returns are allowed for 14 days only (used items) or 30 days (new items). Buyer is responsible for all return shipping costs and for ensuring proper packaging. Buyer must contact us via email before returning any item and obtain an RMA (Return Merchandise Authorization) number. Buyer is responsible for doing his own research to ensure purchase of the correct part. Returns are not allowed due to purchase of incorrect part or change of mind. All returns are subject to a 15% restocking fee unless the item was defective or we made a mistake in the listing. All returned parts found to be tampered with/modified/damaged or incomplete will not be refunded. Payments: Payment is expected within 7 days of purchase. After that, the item will be relisted for sale.