1. YANMAR N22Y has 4 generations of main bearing.
2. 1st~3rd type are thick without using Thrust Washer.
3. 4th type is thin with use of thrust washer.
4. All 4 generations has various sizes from STD~2.00.
5. 1st and 2nd type use with oil seal and o-ring.
6. 3rd type only use oil seal, o-ring is not needed.
1. 1st type: old type. 2. 2nd type: oil seal type. 3. 3rd type: short type. 4. 4th type: thin type.