Page 3 of 6 FirstFirst 12345 ... LastLast
Results 41 to 60 of 108
  1. Member
    Join Date
    Jun 2004
    Location
    Tavares
    Posts
    146
    #41

    Re: Cool!

    I have overlooked this thread for several days, I recently idled through a shallow water canal and noticed later that the tell-tale water stream had about half of its normal volume; I dismissed it as a failing impeller. Everone I talked to about it couldn't agree that my 200HPDI with only 44 hours could have a bad pump. A few days ago I disconnected the flush tube and several small gravels and some really nasty looking water came out of the tube. I can't wait to get home today to check the poppet, hopefully that is the problem with mine as well.

    Thanks for the info!

  2. Moderator Charger's Avatar
    Join Date
    Apr 2006
    Location
    East Tennessee
    Posts
    8,046
    #42

    Re: Cool! (Davew)

    First let me say this is a great website with what looks like tons of info. I am picking up my first bassboat this week. It is a 98 Skeeter ZX202c with a 200 Yamaha VMax.

    What is the purpose of the poppet? Debris catcher? PSI regulator?
    SHould I check this after getting the boat, or wait and see what the water press. is before hand?


    Benjamin Franklin, 1759 - "Democracy is two wolves and a lamb voting what to have for lunch. Liberty is a well armed lamb contesting the vote."

  3. Moderator Triton Chris's Avatar
    Join Date
    Jun 2004
    Location
    Killeen, Texas
    Posts
    13,678
    #43

    Re: Pics of Poppet Valve Location (Bullz EYE)

    bump
    .
    Enter BBC10 for 10% off your order!




  4. Member
    Join Date
    May 2006
    Location
    Sherrills Ford
    Posts
    8
    #44

    Re: Pics of Poppet Valve Location (Bullz EYE)

    Does all this regarding the Poppet Valve apply to my 1998 Pro V 200? I looked at my service manual and can not find this information. Can anyone help here.
    Thanks,
    Bill Venator

  5. Member
    Join Date
    Nov 2004
    Location
    Chesterfield, Va
    Posts
    3,198
    #45

    Re: Pics of Poppet Valve Location (ncyankee)

    They do have one on those motors but not sutre if a new one was made for them. The valce is actually called a pressure control valve so look in your servicemanual for that. Should be in the areas about the crankcase.

  6. Member
    Join Date
    Nov 2004
    Location
    Chesterfield, Va
    Posts
    3,198
    #46

    Re: Pics of Poppet Valve Location (vafishing)

    Just looked it up on boats.net for you and looks like your can be changed to the new style. Part number is 60H-12416-00-00.


  7. Member
    Join Date
    Jun 2004
    Location
    Holmen
    Posts
    197
    #47

    Re: Pics of Poppet Valve Location (vafishing)

    Sorry pics were gone for awhile. Shutterfly changed the address they were assigned to.

  8. Member
    Join Date
    Jun 2004
    Location
    New Hope
    Posts
    20
    #48

    Re: Pics of Poppet Valve Location (madman)

    1st off, "Thank You" to all who post here. The information that folks have shared is great. Just pulled my poppet on my 99 150 Vmax and didn't find it full of trash like I had thought.

    I fish Lake Guntersville that is heavy in grass and thought that thing would be like the one in the pics, but it was fairly clean. I haven't seen any problems with water pressure but thought it needed to be checked. Took the time to wash off the fine dirt and plugged her back up.

    Again........Thanks guys...................

  9. Member
    Join Date
    May 2005
    Location
    Austin
    Posts
    10
    #49

    Re: (21XDC)

    2005 hpdi yamaha
    which side that mushroom head goes?

  10. Member
    Join Date
    Jun 2004
    Location
    Conroe
    Posts
    315
    #50

    Re: (Tr21Pd)

    Have had my 2000 Yamaha 225 V-max for about a month now, put a new water pump in it right after I got it. The overheat alarm has never come on but when I idle out of the marina I show 0 psi, WOT pressure is 15 - 17. I have a solid stream of water at idle but not like I did with my Johnson. Could this poppet cause low pressure also?



    David Disler / Porter TX
    2000 Champion 203 DCX/Elite, 2000 225 Yamaha/HT V-max

  11. Member
    Join Date
    Jan 2005
    Location
    Texas
    Posts
    1,009
    #51

    Re: (DChamp)

    Most likely hot lake temps causing it.

  12. Member
    Join Date
    Jan 2005
    Location
    Dover
    Posts
    28
    #52

    Re: (DChamp)

    If you check with Yamaha tech services they will tell you, all is well with your engine. The poppet valve controls the pressure but most of all the flow of water thru the engine. I am running a 2004 225 HPDI. I did stretch the spring in my poppet vale to increase the pressure but I am noticing a lower pressure as time goes by.

  13. Member
    Join Date
    Sep 2006
    Location
    Pleasant Valley
    Posts
    705
    #53

    Re: (jonruizjr)

    I'd like to first say that I have much more experience on Mercury motors but have just recently aquired a 2003 Vmax EFI and am really trying my best to learn all about it.

    But I can tell everyone how a poppet valve works, either on a Yamaha or a Merc.
    It is designed to remain closed up to a certain rpm level. The pressure is not necessarily indicative of how much cooling is happening but how much water flow there is through the water jackets is the main important thing here.

    (all my pressure numbers are arbitrary, not exact for any engine)
    Think of it this way... At lower rpms, let's say less than 3000 the poppet remains closed and the water pressure maybe around 15psi or less... Now when we rev up to full throttle the pressure is going to increase obviously... This all looks good on the pressure guage, but that does not mean that we have enough water flow through the engine to cool it! High pressure means that the water is being restricted from leaving the engine in relation to how much can enter it.
    So this is where the poppet valve comes in to play. At a certain water pressure which is normally in correlation with a certain rpm, the pressure is enough to exceed the spring and the poppet valve opens and releases pressure by allowing the water to dump out of the cooling jackets via a new exit point. This increases water flow through the jackets and at the same time you will see a lower pressure, maybe around 5-10 psi less. You can even see this happen on a water pressure guage.
    As we continue to raise rpm, the poppet will remain open and the pressure will rise again. Eventually getting up to anywhere around 15psi-22psi depending on your motor set-up and top end rpm. Now 6000rpm and 15psi is no where near the same as 3000rpms and 15psi. At the 6000 the poppet valve is open and the water pump is in theory turning twice as fast and feeding twice the amount of water (in theory) to the block. And because the poppet is open, the flow is twice as much (or so) and the cooling capability is much improved.
    At 3000 rpms there is not as much heat generated so the increased flow is not needed. But at 6000 you better have it.

    The problems with a poppet normally occur in two ways. If it is stuck open at low rpm levels, water will be dumped out of the block when it is not supposed to. You will see lower or very low if not any water pressure at idle and water will not be able to fully circulate the water jackets it just depends on how far open it is stuck. Thus overheat will occur at low rpms. IF you rev the engine up to full throttle it most likely will run normally.

    If it is stuck closed or fully clogged with debri, at higher rpms the water will not be able to dump out of the jackets to "increase" water flow necessary to cool the block at high speeds. Thus you will see high water pressures, most likely higher than normal but because the water flow is not sufficient the water will just get hotter and hotter before it can exit the system. So overheat at high rpms can occur. At low rpms it will most likely run normally.

    This is the best way I can explain it.. If anyone see's anything I described improperly please correct me. Again my experience with poppet valves is much more with the mercs. But their purpose should be exactly the same with only differences in the opening/closing pressures and the amount of water flow through it.


    Modified by KCLOST at 1:53 PM 9/12/2006


    Modified by KCLOST at 1:54 PM 9/12/2006
    Layton Strong
    2008 Stratos 200XL....225HO.....
    Smithville Marine ProStaff

  14. Member
    Join Date
    Jul 2006
    Location
    Lakeland
    Posts
    181
    #54

    Re: (chuy)

    <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chuy &raquo;</TD></TR><TR><TD CLASS="quote">2005 hpdi yamaha
    which side that mushroom head goes?</TD></TR></TABLE>

    Chuy, the mushroom side faces the rear. I just replaced my poppet valve on my 2002 200 HPDI and upgraded to the newer style.

    For those of you asking about doing this on an HPDI, it is not that difficult but you will need to remove the coils and moved the silver fin to the side to access the valve. Even doing this it is not easy but doable.

    Good news is that I have gone from 10 PSI max Water Pressure to a cosistent 20 to 25 PSI with the new poppet valve.


    Special thanks to Hamfisted and others.

    Michael

  15. Member
    Join Date
    Jul 2006
    Location
    Lakeland
    Posts
    181
    #55

    Re: (chuy)

    <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chuy &raquo;</TD></TR><TR><TD CLASS="quote">2005 hpdi yamaha
    which side that mushroom head goes?</TD></TR></TABLE>

    Part number 14 is the new poppet valve.


  16. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
    Posts
    43,276
    #56

    Re: (PF22)

    Nice schematic... I think the pic of 14 is backwards though....

  17. Member
    Join Date
    Aug 2005
    Location
    Tupelo
    Posts
    265
    #57

    Re: (21XDC)

    Thanks for the pics Bullz EYE, and thanks to KCLOST for expanding on the valves operation!

  18. Member
    Join Date
    Jul 2004
    Location
    Torrance
    Posts
    18
    #58
    Another awsome post. Thanks for taking the time!!
    01 Yammie 150 HPDI - 600 hrs and running strong

  19. Member
    Join Date
    Jun 2004
    Location
    maryville
    Posts
    1,555
    #59

    Re: (Leg01as)

    i had my powerhead hanging from a hoist the last few
    days(2002 200hpdi) and before i put it back on i thought
    of this post. mine is on the back of the block. took it off
    everything looked great i can tell it will be a headache to
    get off on that model.

  20. Member
    Join Date
    Jan 2007
    Posts
    13
    #60
    Received my Water Pressure compression value (poppet)(# 60H-12416-00-00 new style), grommet, and spring from Yamaha parts. The old one (photo here) shows the old style. The new value is rounded on one side. To me, it looks like the rounded (mushroom) should face inward towards the engine, and not face towards the compression spring.

    Which is correct?




    Modified by avirex7823 at 4:49 AM 2/11/2007


    Modified by avirex7823 at 4:51 AM 2/11/2007

Page 3 of 6 FirstFirst 12345 ... LastLast

Similar Threads

  1. Poppit valve location on 2004 225 HPDI with pics
    By frogbite in forum Yamaha Motors
    Replies: 17
    Last Post: 06-04-2011, 05:21 PM
  2. Poppet Valve
    By skeeter195 in forum Yamaha Motors
    Replies: 2
    Last Post: 08-24-2010, 08:51 AM
  3. Poppet valve, what does it do?
    By back_lash in forum Yamaha Motors
    Replies: 5
    Last Post: 04-29-2009, 08:56 AM
  4. where is my poppet valve...
    By emudryj in forum Evinrude/Johnson Motors
    Replies: 6
    Last Post: 12-29-2007, 11:46 AM
  5. Pics of Poppet Valve Location on 2000 HPDI 200
    By macinckirk in forum Yamaha Motors
    Replies: 3
    Last Post: 05-01-2007, 01:49 PM