1994 Johnson Evinrude "ER" 90 LV 120 thru 140, 185 thru 225, 250, 300 Service Repair Manual P/N 500612, Page 495Get this manual
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Running Motors Too Fast (Overspeeding)
" Chiseling (steel on steel) (Tip: use plastic or brass type hammersThey don't chip off as easily as steel hammer
Grinding
Acid E