1974 18' Thunderbird S17 BR 1974 Thunderbird S17 Bowrider boat and trailer. The motor shown is bad and is not included. This hull is in good condition with a recently replaced interior. It could be easily repowered with another Johnson outboard. We have many to choose from. The hull is rated up to a maximum of 125 hp which would make this boat fly. The matching trailer is included and is roadworthy. Delivery is available.