2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 145Get this manual
POWERHEAD CYLINDER HEAD Ream the valve guide hole with 10.5 mm reamer to true the hole and remove any burrsReam the valve guide bore with 5.5 mm reamerClean and oil the valve guide bore after reaming
IMPORTANT: Turn the reamer in clockwise direction, NEVER counterclockwise1
1Valve guide 2Reamer
Valve Head and Valve Seat
Use set of "V" blocks to support the valve on surface plateUse dial gauge to measure the valve stem runoutThe service limit for valve stem runout is 0.002 in(0.05 mm)If the measurement exceeds this specification, replace the valve
Heat the cylinder head to temperature of 80 to 100 (176 to 212DF)Apply heat uniformly so the head will not become distortedUse valve guide installer to drive the new valve guide into the hole until the attachment contacts the cylinder headAfter installation, check the valve guide protrusionThe protrusion for the intake and exhaust valves should be 0.55 in(14 mm)1- 3