Re: Johnson TD20 / TN26 etc. – T-shooting Part 2

[aquasonic]

The two small holes in the midsection, just below the swivel bushing are factory vents. If all is right with your cooling system and waterpump, a fine spray will come out of these holes when the motor is running. Sometimes it is tough to see, but easier to see the results of the spray on the side of your test tank, or even put your hand in front of them.

I would be concerned if water was not spraying from these vents, but that is another discussion.

If water is coming out from under the powerhead, but the water is not from the vents or the telltale, then I don’t know. Maybe there is a base gasket problem, or one of the the external water tube connections is leaking.

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