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  • Poppit Valve

    I have a 206 Yamaha F8 which has been having overheating problems.Water pump replaced, thermostat replaced still problems. Does this motor have a poppit valve?I have looked at parts diagrams and can't find one. Thanks for any thoughts.

  • #2
    Didn't see one either on the parts diagram. Exact MODEL # PLEASE.

    Couple things, did you see ANY DAMAGE/ warping to the WP MAIN housing?
    ANY, WILL cause pumping issues.

    When you pulled the impeller was ALL of it there? (didn't break into pieces and clog up the block).

    Lastly, did you replace the WP with a kit (wear plate, inner cup, seals, etc)?
    Scott
    1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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    • #3
      Some of those o-rings can be hard to keep in place prior to bolting the housing back down. If they are not seated correctly, they will leak water and reduce the flow to engine. I would drop lower and double check everything. I use gobs of grease to hold all those seals in place prior to tightening.


      Are you sure it is an overheat warning? I believe low oil pressure could set off the alarm also. Not sure what type of indicators you have?

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      • #4
        it is a 2006 T8 ELHD motor.I am going to check the pump and housing to see if anything looks odd. Thanks for any input.

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        • #5
          Redid the lower unit and found an old piece of impeller under the plate. Fixed and running fine now. Thanks for all the replies. Have another question ,while cleaning inside lower cowl found this little grommet. Looks like it might go on the end of the throttle cable but not sure. Here's a pic.
          Attached Files

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          • #6
            What side of the engine did you find it (and forward/rearish)?

            If it has a hole (or cut "x" slice) on the smaller end, it may be a water drain that sets in a hole on the lower cowling.

            Lets water water out, doesn't let water in.

            Don't that's it, part #18 is the closest:
            http://www.boats.net/parts/search/Ya...ING/parts.html

            And tks for the update on the overheating issue!


            .
            Last edited by TownsendsFJR1300; 06-04-2017, 08:02 AM.
            Scott
            1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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            • #7
              I think the part is # 29 it fits there.2006 and Later T8ELH Yamaha Outboard CONTROL 1 EH PH Diagram and Parts for all the help.

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              • #8
                Originally posted by chrissy t View Post
                I think the part is # 29 it fits there.2006 and Later T8ELH Yamaha Outboard CONTROL 1 EH PH Diagram and Parts for all the help.
                That link goes to EVERY part of the engine, not just one page(ie cowl)...
                Scott
                1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

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                • #9
                  the part is #29 under
                  Component: CONTROL 1 EH PH sorry for the wrong diagram

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                  • #10
                    Originally posted by chrissy t View Post
                    the part is #29 under
                    Component: CONTROL 1 EH PH sorry for the wrong diagram

                    2006 and Later T8ELH Yamaha Outboard CONTROL 1 EH PH Diagram and Parts


                    Looks like just a cover for a threaded rod if that's it but yamaha calls it an "overflow cap".. That parts diagram or at least the description is not right.

                    Now where does part #21, the linkage, go to? As it appears threaded, ???
                    Last edited by TownsendsFJR1300; 06-06-2017, 07:49 AM.
                    Scott
                    1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXR

                    Comment


                    • #11
                      Originally posted by TownsendsFJR1300 View Post
                      Looks like just a cover for a threaded rod if that's it but yamaha calls it an "overflow cap"..
                      That parts diagram or at least the description is not right.
                      one nice thing about the boats.net site -
                      when you search on a single part number, its lists the entire "where used"

                      it appears that particular little cap originated on the carburetor of a 1989 engine.



                      Years later the engineers re-purposed it for this engine - same part # and description

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                      • #12
                        Looks like that rod attaches to throttle/choke

                        probably opens the throttle a little when choke activates maybe

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                        • #13
                          That rod attaches to the throttle plate on the carb.There is a cable system that goes from the tiller handle around part 18 pulley which advances the carb. Many working parts on a small motor.

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