Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 150Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 150

CYLINDER BLOCK AND CRANKCASE
10Pull out the camshaft and remove both valve lifters
NOTE: Keep intake and exhaust valve components separate and reinstall in original location
aCamshaftValve Lifters 11Remove the Cylinder Head Assembly