Home › Forum › Ask A Member › 1985 johnson 9.9 running temp › Re: 1985 johnson 9.9 running temp
The tell tale only shows that the water pump is functioning. It gives no indication that the water is circulating in the powerhead water passages,as the tell tale gets its water as it just enters the powerhead,not after it circulates through the block.
Have you checked the thermostat for proper operation? If it is a salt water motor it could have corrosion blockage around the cylinders and head water passages and around the t start. If it is a salt water motor,i would remove the cylinder head and clean the water jacket passages.
When i test a motor in a barrel,i leave the water hose turned on and submerged in the barrel keeping a fresh supply of cold water in the barrel,as the 9.9’s underwater exhaust warms the water. The 90 degree water makes it more difficult to cool the motor.
"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson