Now Aluminum not Copper.- This is normally found behind the Starter Clutch Ring Gear. 25.3mm I.D. x 39mm O.D. x 1.0 m.The newer 1:7 Cranks need the 27mmI.D. washer.
Please use an Installation Tube of 27-28mm I.D.1" I.D. tube is too small and will damage the spring loaded seal.
Same Impeller 19721-003-0000 Fits 250, 400, 800, 1000
