Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 79Get this manual
Power Unit 2) Inspection of Valve Clearance
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 b
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 seen3