1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 102Get this manual

1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 102

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8 With throttle at idle position, turn idle spe ed screw clockwise "INuntil gap of 0.005 in- 0.040 in(0.13 mm1.02 mm) is achieved betwe en throttle cam and cam followerThis will open the throttle shut