Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 298Get this manual
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SERVICE MANUAL NUMBER 24
15 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
ENGINE RPM
= Base Timing Advance CurveIdle Speed Advance RangeKnock Retard RangeAcce