1971 Evinrude StarFlite 100 HP Outboards Service Repair Manual, PN 4753, Page 25Get this manual
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NEEDLE VALVES aInspect the tapered end of the needle valves for grooves, nicks, or wear; replace if necessarySee Figure 3-14bDO NOT attempt to alter the shape of the low-speed needle valvesOARBURETOR