1991 Boston Whaler Challenger 1991 Boston Whaler with Rebuilt Twin Johnson V6’s The Pilot House is forward with Companion Seating and a very large Cockpit. Cushions have been recently reconditioned.This boat was totally reconditioned in 2003: Hull and Engines, Lower Units in Engines were replaced in 2011. It was previously used as a marine research vessel and would make a great fishing / dive boat or other commercially used vessel.