2007 Johnson 2 HP 4-Stroke Service Manual, Page 42Get this manual
MAINTENANCE COOLING SYSTEM
COOLING SYSTEM
Check the condition of cooling system components regularlyThe outboard cooling system consists of: water intake screens overboard water pump indicator water pump all internal water passages thermostat
IMPORTANT: To prevent damage, do not run
outboard above fast idleWater must flow from the water pump indicatorIf it does not, shut off the outboard and repair as neededShut OFF the outboardLeave the outboard in VERTICAL (DOWN) position long enough for the water to drain from the powerhead completely
Flushing
Flush the outboard with fresh water following each use in brackish, salt, or polluted water to minimize the accumulation of scale and silt deposits in cooling system passages
WARNING