Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 99Get this manual
EMISSIONS I'll
Timing: Not Adjustable
PART37-85698418
This engine conforms to U.SEPA regulations lor marin SI ngines
Idle Speed (in gear): 1100 RPM
Refer to Owners Manual for required maintenanceFamily: WM9XM.323220
Standard Spark Plug: NGK DPR6E Gap:.035" (0.9 mm)
-4-5 HP 4-Stroke
FEl: 40.00 GMKW-HR
Valve Clearance (Cold) mm Intake: 0.06-0.14 Exhaust: 0.11-019