Rotax Wedge 8.5X15X0.50 Carter (21)

Complete description: the precision in half-millimeter

Why is this washer specific?

1. Controlled thickness: Unlike a hardware washer, it is rectified to provide a constant thickness of 0.50 mm over its entire surface.

2. High resistance steel: Designed to undergo repeated axial pressures and rub against sprockets or housings without crashing or feeding prematurely.

3. Noise reduction: By properly saving the trees, it avoids mechanical "cloc-cloc" and ensures more silent and more regular mester of the gnat.

4. Specific dimensions: The inner diameter of 8.5 mm is perfectly adjusted to the 8 mm axes of the block Rotax, avoiding any floating or decentrage.

💡 Michel's trick

"It's the room that often stuck at the bottom of the housing by the oil when you disente! My advice: When you open your sandy, make a precise inventory. If you forget this washer to the reassembly, your axis will have too much side game, and your sprockets Plastics may no longer be perfectly aligned. Result? A whistle tear of teeth and a short-term breakage. And a small trick: if the puck is' blue '', it is that it heated for lack of lubrication, change it without hesitation!"

🎓 Tuto: assembly and verification

1. Cleaning: Wipe the washer to check that it does not have any deep burr or scratch.

2. Positioning: Place it on the relevant axis (often before sliding a pinion or after, depending on the technical scheme).

3. Checking the game: Once the housing is closed (even with only two screws of approach), check that the axis rotates freely but that it does not have an excessive back and forth movement (usually we are looking for a game between 0.10 and 0.30 mm).

4. Lubrication: A little oil XPS Gear Oil On each side of the washer during the assembly facilitates the first start.

✅ Features

• Reference Rotax : 227480

• Dimensions: 8.5 mm (int.) X 15 mm (ext.) X 0.50 mm (thickness)

• Material: Rectified steel

• Compatibility: Rotax 125 Max, Junior, Senior, Master, DD2.

Note Magickart: Sold individually. It is common to find several in the engine, check your technical bursts (often around the water pump axis or intermediate sprocket).