Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 135Get this manual

Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 135

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CYLINDER BODY ASSEMBLY
T(maximum D1 or D2) (minimum D5 or D6)Maximum (D1 D2) or (D3 D4) or (D5 D6)
A: 10 mm (0.4 in) below the top of the cylinder B: mm (0.2 in) above the exhaust port C: