Suzuki 30-40HP outboard motors Service Manual, Page 4Get this manual
Suzuki DT30 (Prior to 1988) THERMOSTATA thermostat (7FigSZll14) is used to regulate oper ating temperatureThermostat should start to open within the temperature range of 48.5 .51.5 (119.125 F)Thermostat can be removed for inspec tion or renewal by removing cylinder head cover (6)