Sea Doo CHALLENGER 1800 - Boats from USA RARE 1999 Sea Doo Challenger 1800. Twin motor Jet Boat 18'. This is the Sea Doo everyone wants and is considered a collector's piece. Boat has twin 787 jet motors. PORT one is brand new UNDER 50 HOURS. STARBOARD WAS REBUILT WITH 8-10 HOURS. receipts from SBT Inc starters. New fuel lines and marine batteries with Perko. switch.5/5(1)Brand: Sea Doo Playing - Sea-Doo Challenger 1800 - | New Boat Reviews With seven seats, the Sea-Doo Challenger 1800 is one of the biggest and fastest jet boats on the water today. The 1800 is a fun, versatile, and easy to use jetboat that everyone in the family will enjoy.
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