2007 Johnson 2 HP 4-Stroke Service Manual, Page 90Get this manual
POWERHEAD CYLINDERCRANKCASEPISTON Inspect the camshaft gear for wear or other damageReplace, if necessaryCylinder distortion: Service limit: 0.002 in(0.05 mm) If the measurement exceeds the service limit, resurface or replace the cylinder
Cam Rocker Arm
Inspect the cam rocker arm for wear or other damageReplace, if necessary006073
IMPORTANT: The cylinder can be resurfaced,
using surface plate and #400 grit wet sandpaperMove the cylinder in figure eight pattern when sandingWater Jacket Inspect the water passages for clogs or obstructionsClean, if necessary