1999 Volvo Penta "WT" Models Workshop Manual, Page 296Get this manual
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Engine Specifications Valve Systems:
Stem to Guide Clearance
0.00100.0027 in(0,02540,0270 mm) 0.00120.0029 in{0,03040,0736 mml Intake, Service Hi Limit Production0.001 in(0,0254 mm) Exhaus