Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 214Get this manual
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5.0l305 cid5.7l350 cid ENGINES
Disassembly
Refer to "Exploded View" in this section1 Remove pump coverIMPORTANT: Mark gear teeth for reassembly with same teeth indexing2 Remove idle