Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 415Get this manual
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MERCARB BARREL CARBURETOR
aNeedle AssemblyNeedle Seat 13 Remove needle seat72289
aNeedle SeatGasketScrewdriver
Needle and Seat AssembliesSpring Loaded Type Needle (Kit 3302-90