1998 Johnson Evinrude EC 5 thru 15 HP Four Stroke Service Manual, Page 37Get this manual
Special Operating Conditions Salt Water
8 thru 15
Fresh water internal flushing is recommended after use in salt, polluted, or brackish water to prevent deposits from clogging the cooling passages Remove water flushing plugAttach water hose and turn on water to begin flushing
INote Motor can be stopped or running at idle while flushing Do
not flush engine with water system that exceeds 45 PSI
Run engine in test tank or large container of fresh water, such as 3D-gallon (113 liter) garbage can, for at least five minutes as soon as possible after each use in salt, polluted, or brackish water to prevent deposits from clogging cooling passages: Run engine in well -ventilated area Remove propeller Water level must be in(10 cm) above the antiventilation plate Eng ine in NEUTRALRun at fast idle only
Notel Water must flow from the water pump indicator
All Models During long periods of non-use, tilt motor so that the gearcase is out of the water, unless the temperature is below 32 (00 C)When removing motor from water, allow cooling system to drain completely by placing motor in normal (vertical) position Weedy Water Weeds can block the water intakes and cause engine to overheatWeeds on the propeller will cause motor to vibrateRun at slow speeds and reverse motor frequently to clear weeds from propellerCheck water pump indicator often Remove weeds from propeller and water intakes before operating in clear waterFreezing Weather To avoid motor damage, keep gearcase submerged in water at all timesBefore operating in freezing temperatures, check gearcase lubricantIf leakage is found, service gearcase sealsWhen removing motor from water, keep motor in normal (vertical) position until the cooling system is completely drained