JACKET WATER COOLING SYSTEM DRAWING FS 435 To clean jacket water cooling system of oil, follow steps (a) and (b). For removal of scale, follow steps (a) to (f), inclusive. (a) Run engine at reduced speed with water temperature between 140°F - 160°F, Circulate "B" cleaner through system for at least 30 minutes. (b) Drain and flush with clean water. (c) Run engine at reduced speed with water temperature approximately 14,0°F. Circulate "A" cleaner solu- tion through engine for not more than 30 minutes. (d) Drain and flush with clean water. (e) Circulate a "B" cleaner solution to neutralize acidity. (f) Drain and fill system with soft water and test for acidity. 3-10