Honda Outboards BF40A/BF50A Service Manual, Page 52Get this manual
HONDABF3I5A415A 10) After adjusting the intake and exhaust valve clearances of the No.1 cylinder, turn the pulser rotor 120 further and align the "2A" mark with the "Tt" mark on the cylinder head (which indicates that the No.2 piston is at the top dead center of its compression stroke), then adjust the intake and exhaust valve clearancesFinally, turn the pulser rotor 120 further and align the "3A" mark with the "Ttl' mark on the cylinder head (which indicates that the No.3 piston is at the top dead center of compression stroke)then adjust the intake and exhaust valve clearances
FUEL STRAINER
Gasoline Is extremely flammable and explosive under certain conditionsDo not smoke or allow flames or sparks in the area Inspection
FUEL STRAINER
Turn the fuel knob at the fuel tank to the "OFF" position and remove the engine coverPull the choke knobPull the fuel strainer retainer toward you and remove the fuel strainerCheck the fuel strainer for cloggings with water and dirt