1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, Service Repair Manual P/N 507875, Page 70Get this manual

1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, Service Repair Manual P/N 507875, Page 70

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Carburetor Orifice Plug Reference Chart It is occasionally necessary to replace carburetor orifices to improve engine running characteristicsCheck current parts catalogs for orifice part numbersINotel

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