1977 Evinrude 175-200 HP Service Repair Manual P/N 5311, Page 137Get this manual

1977 Evinrude 175-200 HP Service Repair Manual P/N 5311, Page 137

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Specific gravity will vary points (.004) with every 10 (6temperature changeFor each 100 (6below 800 (27, subtract points from hydrometer readingFor each 100 (6800 (27, add points to hydrometer reading