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mon-thurs 9-5 cst
The Adjusting Nut allows you to adjust the lash clearance on your rocker arm. When checking lash goes by the cam manufacturer's recommendation. If running a stock cam set your lash to less than .003” we suggest setting it at 0 since in most cases it will loosen as the engine heats up. Lash that is too wide will make the engine difficult to start. This is due to the compression release on the cam not fully reading the lifter to open the exhaust valve to make it easy to start. Do not overtighten the rocker adjuster nut or your rocker arm may resist pivoting resulting in excess friction, heat and lead to rocker arm or valve failure.
The Rocker Adjuster Nuts are the OEM Replacement for 196cc 6.5hp GX200 Clones including the Tillotson 196R/RS, Ducar 196, and Box Stock 196. These also fit the Predator 212 Non-Hemi Cylinder Heads.