1968 6 h.p. johnson

[jedi4]

motor has thermastat but does not seem to get hot enough. any ideas thanks jedi

 

[Vic.S]

Re: 1968 6 h.p. johnson

Defective thermostat ( stuck open) ????

Not fitted in housing correctly ???

 

[jedi4]

Re: 1968 6 h.p. johnson

thanks vic pulled it out and cleaned it , looks okay but will put in a pan of hot water and see what happens. jedi

 

[F_R]

Re: 1968 6 h.p. johnson

99% of the time, if it fails, it will fail in the open position. That is easy to tell at a glance.

On that motor, the thermostat only controls the temperature of part of the motor. The other part always gets full flow. Why do you feel it is not hot enough?

 

[jedi4]

Re: 1968 6 h.p. johnson

water coming out is only lukewarm

 

[jedi4]

Re: 1968 6 h.p. johnson

thermastat looks ok just does not seem to get very warm

 

[royal0014]

Re: 1968 6 h.p. johnson

Lukewarm is good, boiling hot is not.


<<)))(((>>

 

[F_R]

Re: 1968 6 h.p. johnson

water coming out is only lukewarm

Remember what I said? Water is free flow through part of the powerhead. Cold lake water isn't going to increase much in temperature. It is the temperature of the powerhead that counts anyway--not the temperature of the discharge water. A worn out water pump will give you a nice hot discharge---hardly what you want.

 

[1946Zephyr]

Re: 1968 6 h.p. johnson

The real test is how long you can put your hand on the head, before it gets to hot to touch

 

[jay_merrill]

Re: 1968 6 h.p. johnson

If you look at the back of your motor, at the cylinder head, you will see a vertical tube running down it. That is the bypass that F_R is talking about. Because of it, cooling water flows through part of the powerhead all of the time.

Check your t-stat and replace it if needed. Other than that, you should be OK.



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