I messed with adjusting valve clearance on my Honda HRC216HXA K3 and am having some problems. Probably there was no reason for me to do this, just thought it would cool to learn about. A few years ago I had a trained Honda mechanic come to my house to look at some things on my mowers and at some point he said, hey let's adjust the valves on.. HRX217K2 HXA owner's manual: https://cdn.powerequipment.honda.com/pe/pdf/manuals/31VH7H42.pdfGCV190 shop manual: http://www.honda-engines-eu.com/documents/10.
(both valves fully closed). The triangle mark on the starter pulley will align with the top hole on the starter cover when the piston is at top dead center of the compression or exhaust stroke. ③. Insert a feeler gauge between the rocker arm and valve to measure valve clearance. Valve clearance: 0.15 ± 0.02 mm (0.006 ± 0.001 in) (IN). Intake and Exhaust Valve clearances for Honda small engines used on various outdoor power equipment applications.. Intake Valve Clearance: Exhaust Valve Clearance: GX640: 0.10-0.14mm ( 0.004-0.006in ) 0.18-0.22mm ( 0.007-0.009in ) GX100: 0.15 +/- 0.04mm: 0.20 +/- 0.04mm: GX120: