Honda Outboards BF40A/BF50A Service Manual, Page 253Get this manual
2SERVICE INFORMATION1MAINTENANCE STANDARDS
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1MAINTENANCE STANDARDS
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Unit: mm (in)
BF40A standard #92
BF50A service limit standard #130
service limit
Carburetor
Main jet Jet set Pilot screw opening
Float height
2-14 turns out
1 turn out
Spring free length Valve head diameter