Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 86Get this manual

Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 86

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TROUBLESHOOTING
Scavenger Deposits
Powdery white or yellow deposits are built up on shell, insulator and electrodesThis is normal appearance with certain branded fuelsAccumulation on groun