Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 49Get this manual
Maintenance 13) Inspection and Adjustment of Valve Clearances
1Disconnect plug cap connection, and then, remove spark plug and cylinder head cover 2When removing or installing cylinder head cover without removing power unit, use 10 mm box wrench with large offset anglePull recoil starter to turn flywheel clockwise until flywheel "T" mark is brought to flywheel cover "L" mark Set piston to top dead center of compression stroke Remove oil filler cap and check that mm (0.2 in) hole of cam shaft gear can be seenb aCheck clearances of intake valve and exhaust valve eAdjust gap if it is out of specified rangePerform inspection and adjustment of valve clearances when engine is coldValve Clearance (when engine is cold)(IN) Intake side0.060.14 mm (0.00240.0055 in) (EX) Exhaust side0.110.19 mm (0.00430.0075 in)