Re: 1958 Johnson Super Seahorse 35
You will have to fine tune on the water when there is proper backpressure on the motor. Do the high speed first, then the low. If you need help with this let us know.
Regarding the water flow, it will fluctuate based on the position of the thermostat. Your motors water pump will constantly send cooling water through the powerhead, then present it to the thermostat. When cold, the t stat stays closed and the water is sent back to the pump to be resent through the power head. Once to temp, the t stat will open and send the spent cooling water out the exhaust relief. That is when the pressure will increase. Then when it cools the t stat will close and the cycle will start again. The amount it opens and closes will vary depending on the temp of the lake.