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  1. G

    2007 Yamaha F200 Thermostat Problem

    Sorry if I confused you. No, I do not want to run the motor without a thermostat. Just asking your input whether my f200 Yamaha would be OK to use without one. My problem is that the motor overheats with both thermostats installed but with the port thermostat removed, it does not overheat...
  2. G

    2007 Yamaha F200 Thermostat Problem

    Thanks for your quick reply. Yes, water is now coming from the tell-tale and the motor is not overheating but, importantly, it does not have a thermostat on the port side. Would it be ok in your opinion to run the motor under full throttle conditions for extended periods of time without one of...
  3. G

    2007 Yamaha F200 Thermostat Problem

    My motor tell-tale peed nicely before I started repairing the leak. After patching the hole and installing a new thermostat, no water came out of the tell-tale and the helm beeper went off because, I assume, the motor was overheating. I then removed the thermostat and reassembled all that I...
  4. G

    2007 Yamaha F200 Thermostat Problem

    Boscoe, Your informative diagram helps to understand the flow of cooling water in the motor. Thanks for sending it. You mention the thermostat has nothing to do with water flow out of the tell-tale and your diagram seems to show that. But I thought that with the thermostat closed, there...
  5. G

    2007 Yamaha F200 Thermostat Problem

    Boscoe, Thanks for your input and what happens to the water flow inside the engine. Please remain patient and stay with me on this. I'm still confused, though. I had no water out of the tell tale after replacing the thermostat but had water out of the tell tale when the thermostat was taken...
  6. G

    2007 Yamaha F200 Thermostat Problem

    Please explain
  7. G

    2007 Yamaha F200 Thermostat Problem

    Purchased on the net......not sure if they are OEM or not. Both new thermostats as well as the olf one taken out of the engine tested as properly functioning.
  8. G

    2007 Yamaha F200 Thermostat Problem

    After repairing a leaking port side thermostat housing on my 2007 Yamaha F200, I installed a new thermostat. On starting the engine after this work, there was no water coming out of the telltale. As soon as the overheat beeper sounded, I shut it down. The motor was on the boat and...
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