Re: Road Construction Johnson

[Anonymous]

This motor has no water pump, running in a barrel will over heat the motor. It uses forward motion of the boat and the prop wash to force water into the water scoop to fill the water system and gravity to make the water to flow though the cooling system. When running on a boat, start the motor and run to full speed on plane to purge air and start the cooling water flow. after doing this you may slow down and idle along, but do not make a hard turn at idle as you will interrupt the cooling flow and start over heating. It’s called a pressure vacuum system.