1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 180Get this manual
Quality of the image is intentionally reduced!
6-37 POWER UNIT VALVE SPRING Valve spring free length Check spring strength by measuring free length09900-20101 Vernier calipers Valve spring free length StandardINEX 33.1 mm (1.30 in Service limitINE