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  1. #46
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    Considering the high pressure readings my guess is you need to pull powerhead and clean adapter. For pressure to rise there must be a restriction.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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  3. #47
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    poppet holds the water in the motor at idle to warm the motor. On a HP nic motor there is no poppet, it just dumps all the water quick and runs cold at idle as at high RPM it needs the flow the water fast to keep it cool. Your poppet is irrelevant once you stop on the gas past idle. Like if your were trolling while fishing. The popet is closed the whole time. once the temp gets up the stats open and flow more water to cool the motor. Once you stop on the gas, the poppet opens to flow water with the added heat from higher RPM.
    1973 Viper - sold
    1978 Viking - sold
    1995 XB02

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  5. #48
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    Quote Originally Posted by rjdubiel View Post
    Wives tale for what motor would be my question? just saying if you put steel bores in a 9K rpm motor and do not build heat you will have issues. You also need to watch piston to wall clearance for steel bore high rpm and forged pistons. There is not one solution for all motors. This is a fishing motor we are talking here and it was not dumping enough water as the poppet was stuck shut so it overheated when he was going across the lake. simple as that.
    HAHA, I knew this would ruffle some feathers. But it is true.
    1973 Viper - sold
    1978 Viking - sold
    1995 XB02

  6. #49
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    You don't really know what passage or hole the crap is blocking when the motor is running & overheating... just that it ends up in the poppet afterward. You might be losing flow to one head because a stone gets pushed up and blocks the outlet when the water flow is high... then drops out and drains down into the poppet when you slow down or stop?

    Let's just go ahead and make America great again!

  7. #50
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    Quote Originally Posted by David - WI View Post
    You don't really know what passage or hole the crap is blocking when the motor is running & overheating... just that it ends up in the poppet afterward. You might be losing flow to one head because a stone gets pushed up and blocks the outlet when the water flow is high... then drops out and drains down into the poppet when you slow down or stop?
    After I cleaned the poppet tuesday, and ran it last night, it ran a little "warm" but I expected that with 95 degree ambient and 85 degree water. It still stayed around 160 for the 3 longer runs I made (4 miles at one run, then 2 and 2).

    Before it got hot out it would run a little cooler, 150ish.

    So I may have lucked out and it all just ends up in the poppet. I'm headed out of town after work tomorrow, so I won't be around it for a week, but when I get back home, I'll pull it out again and check it to see if more junk has shown up in there. Maybe it's like you are saying, floating around in there as I run it, and it ends up in the poppet.

    It's not the end of the world to pull it down, but it's not something I can do at a tourney, or during a tourney. Down time means I don't have a line in the water, which means I'm not catching fish! lol The last 2 times I've just had to cruise back to the landing at 30ish. This seemed to be it's happy place where the temp stays down. Any faster the temp climbs.

    Since I was in the garage, I did run a compression test just to be sure I haven't hurt anything. They are all within 8psi, the top 2 being the lowest at 112, the middle are 120, bottom 115. I'm thinking it may not even be fully broke in, since they are all climbing since the last time I checked it at 20 hours. It now has 30. (done cold with closed throttle... I know... tisk tisk... but I didn't have easy access to my hose to run it, or an assistant to hold the hot foot WOT)

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  9. #51
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    Well... Last night the landing at Mazaska in Southern MN is STUPID shallow. I didn't realize it till it was to late. Literally I pulled nose up to the dock to pick up my fishing partner and we beached. WTF....

    Guess what...

    Stuff in the poppet again.

    There has to be a modification for this or something. I can't believe that there are thousands of these motors running around with guys running STUPID high water pressure and high temps. Last night I didn't realize it, never got an alarm, but the gauge was up around 190-200 when I saw it and slowed down so it could cool down. NOT cool.

    I looked at my old OMC, and it has screens that are on the inside of the lower unit preventing this. Does someone make something for that? Or is the washer in place of the poppet the only real option here?

  10. #52
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    Quote Originally Posted by DieselDood View Post
    Since I was in the garage, I did run a compression test just to be sure I haven't hurt anything. They are all within 8psi, the top 2 being the lowest at 112, the middle are 120, bottom 115. I'm thinking it may not even be fully broke in, since they are all climbing since the last time I checked it at 20 hours. It now has 30. (done cold with closed throttle... I know... tisk tisk... but I didn't have easy access to my hose to run it, or an assistant to hold the hot foot WOT)
    You can hold the throttle open (carbs or EFI) right at the motor... don't have to touch the Hot Foot or move the cable at all.

    Let's just go ahead and make America great again!

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  12. #53
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    use remote start button.. disconnect tha throttle linkage and use a bungee cord to hold 'em open.. same when settin' wfo timin'.. one man operation.. pull kill switch when doin' comp....

  13. #54
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    Quote Originally Posted by tlwjkw View Post
    use remote start button.. disconnect tha throttle linkage and use a bungee cord to hold 'em open.. same when settin' wfo timin'.. one man operation.. pull kill switch when doin' comp....
    Don't you just push the roller with your finger to open the throttle plates?

    Let's just go ahead and make America great again!

  14. #55
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    if ya let go they close don't they?.. don't need ta hold 'em with a bungee... disconnectin' tha linkage is mainly for timin'...

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  16. #56
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    Guys... if I saw an issue. I'd fire it up, warm it up and do the compression test "right"

    Being withing a few PSI of eachother, there isn't an issue that is going to magically pop up when the throttle plates are open.

    The issue I have is the damn poppet getting stuck closed. Water pressure pegs the gauge and cylinder head temps climb.

    When the poppet is working, all is well. But anytime a little dirt gets stirred up, it sticks closed.

  17. #57
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    I said this before. I was told i was wrong so I just checked in the parts catalogs. There is more than 1 spring part number. Some high performance motors used a stiffer spring. I would start there by ordering the correct kit for your engine. Make sure the poppet moves freely in the rubber grommet, sometimes corrosion can get behind the rubber and squeeze the poppet, making it hard to move.

    How big are these pieces of debris that are sticking the poppet?

    I have never seen this issue and have watched guys run there engines for hours stuck into the sand.
    ANTI40​It's just an idea.

  18. #58
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    Click image for larger version. 

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    I'll try to attach all 3 pics here, but it may end up 3.

  19. #59
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