Yamaha Not Peeing

Discussion in 'Outboard Maintenance' started by UFgatorbait, Apr 25, 2014.

  1. UFgatorbait

    UFgatorbait I Love microskiff.com!

    My 2005 yamaha 2 stroke 8 hp is not peeing. I checked to make sure the hole wasn't clogged and check the water input plates and they aren't clogged. Im thinking about replacing the impeller is there any other suggestions. thanks so much
  2. Dudeitsmattx

    Dudeitsmattx 16' Dolphin Renagade Tiller Kevlar

    Impeller or maybe the thermostat is stuck closed.

  3. Brett

    Brett > PRO STAFF <

    Reasons for loss of water pressure?

    Ones I've had to deal with:

    1) Blocked intake, usually mud, from running too shallow
         or mud wasp building a nest when boat stored outside
    2) Worn impeller, blade tips/edges abraded by silt or sand
    3) Impeller detached from metal core
    4) Impeller housing seals no longer seal
    5) Bad seal where water tube enters block
    6) Blocked water jacket
    7) Blocked or frozen thermostat
    8) Blocked feed to pisser tube
    9) The worst one, sheared drive shaft just above the impeller housing

    One other thing, if I take the time to drop the lower unit
    and I can tell the impeller hasn't been serviced in a long while
    I don't just replace the impeller, I replace the housing and all seals.
    The kit isn't that much more in price, than just the impeller.
  4. noeettica

    noeettica Well-Known Member

    Buy the factory service manual

    and follow Brett's check List ...

    Good Luck ;)
  5. UFgatorbait

    UFgatorbait I Love microskiff.com!

    after taking the lower unit off i discovered the problem you can tell the impeller has seen better days…I replaced and changed seals and put near gear lube and its running like a champ. ;D
  6. Brett

    Brett > PRO STAFF <

    Yep, the neoprene blades get brittle over time and fragment.
    That's why it's recommended that you replace the impeller regularly.
    The recommended interval is 100 hours or every other year.