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Thread: Engine Noise coming off the Throttle

  1. #11
    Join Date
    Jul 2006
    Location
    Raystown Country, PA
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    2,337

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    One last thing, pull the cover off and see if it is louder, it really sounds like it's under the hood, it could be a belt or an idler, both much cheaper to replace than anything lower unit related. Don't drop the cover.
    1992 Tracker Party barge 24 (new deck, carpet and interior, 2019)
    1996 Mercury 115 ELPTO
    1983 Sea Nymph FM171 Striper
    1985 Johnson 70 J70ELCO

    Raystown Country, PA

  2. #12
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
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    75

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    I will check the plug tonight when I get the boat back in my driveway. I used this lube to fill from the bottom plug to the top one: https://www.walmart.com/ip/Quicksilv...E&gclsrc=aw.ds

    Is this issue not something I can troubleshoot on my own with direction? I'm reasonably comfortable with a wrench and if I need to, I can always buy a Factory Service manual... I'm just not sure what would cause this sound. Something in the engine? Upper geardrive?

  3. #13
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
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    75

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    Quote Originally Posted by Moser View Post
    One last thing, pull the cover off and see if it is louder, it really sounds like it's under the hood, it could be a belt or an idler, both much cheaper to replace than anything lower unit related. Don't drop the cover.
    Understood. I will do this tonight. If I'm not mistaken, the sound doesn't seem to happen when it's in my driveway but I'll confirm that this evening and post back my findings.

  4. #14
    Join Date
    Jul 2006
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    Raystown Country, PA
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    That oil is perfect and you did it the right way.

    See what's on the plug magnet today, it will tell you a lot.

    A lower unit is not a complicated assembly. The problem is, that if you change anything other than a seal, you have to have the correct measuring equipment to reassembly and shim the components to factory specs. You could pull the bearing carrier and look, but I'm not even certain you have a lower unit issue.

    See what today's inspections reveal.

    Pull that bottom drain plug out, and stick yopur finger over the hole long enough to get a good look at and a picture of what is on the magnet. Don't worry if you lose a tablespoon of oil, it will be fine.
    1992 Tracker Party barge 24 (new deck, carpet and interior, 2019)
    1996 Mercury 115 ELPTO
    1983 Sea Nymph FM171 Striper
    1985 Johnson 70 J70ELCO

    Raystown Country, PA

  5. #15
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
    Posts
    75

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    Quote Originally Posted by Moser View Post
    That oil is perfect and you did it the right way.

    See what's on the plug magnet today, it will tell you a lot.

    A lower unit is not a complicated assembly. The problem is, that if you change anything other than a seal, you have to have the correct measuring equipment to reassembly and shim the components to factory specs. You could pull the bearing carrier and look, but I'm not even certain you have a lower unit issue.

    See what today's inspections reveal.

    Pull that bottom drain plug out, and stick yopur finger over the hole long enough to get a good look at and a picture of what is on the magnet. Don't worry if you lose a tablespoon of oil, it will be fine.
    I'm about to check it out here shortly and tell. Fortunately when I bought replacement lower unit oil, I bought several jugs to keep stocked so I will top it off after I check. I did replace the spark plugs because that was on my mental to-do list. It's hard to stay on top of maintenance without an hours meter on this dang thing. Here are how the plugs looked.

    https://photos.app.goo.gl/4yBt75nwSeubUc969

  6. #16
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
    Posts
    75

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    Metal all over the plug again. Here's a pic of the drained(that I just replaced yesterday) lube.

    https://photos.app.goo.gl/Zggv7nhYi2QDBa3e7

  7. #17
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
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    75

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    Also, not sure if this is related but I marked my hub the other day and it seems that it is slightly now misaligned. Not sure if that matters, is relevant or anything else... Just giving all the info I have:
    https://photos.app.goo.gl/4ZuhZ79ZJGTW5fR69

  8. #18
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
    Posts
    75

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    Pic of the prop shaft, noted possible scallop style abrasions, very mild, at the end, perhaps from vibration?
    https://photos.app.goo.gl/9TvkqKSuuk7gLztf9

  9. #19
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
    Posts
    75

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    Impeller and lower unit shaft
    https://photos.app.goo.gl/SDhCg8hbrKpfEEVY9

  10. #20
    Join Date
    Jul 2020
    Location
    Dallas/Fort Worth
    Posts
    75

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    Pumped a whole quart of lube through the lower unit to try and "flush it out" and this is a handful of what was coming out at the end of the flush:
    https://photos.app.goo.gl/dRV5LSGD9au7W6Sw6

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