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Malibu Monsoon Chirping

MrBMrB Posts: 146 Baller
edited June 2012 in Boat Talk
Since I put the boat in the water in early spring, when I go into gear it makes a chirping sound. Also when in neutral, if I attempt to spin the prop by hand it is extremely stiff. Any ideas?


  • swc5150swc5150 Posts: 2,263 ★★★Triple Panda Award Recipient ★★★
    Maybe the strut bushing is shot? Drive shaft alignment, or bent shaft? Could be a few things.
    Scott Calderwood
  • DWDW Posts: 2,026 Mega Baller
    Sounds like the strut bushings, are they the black rubber ones or the white vesconite ones? Are you spinning the prop while boat is in water or out, if out and you have rubber bushings that might be normal as when dry they tend to bind. The new chirping noise adn the fact you notice something would lead me to believe something is amiss.

    Check shaft to engine alignment, bent shaft have you hit anything recently? Did you run the shaft dry, that will toast the bushings.
  • ForrestGumpForrestGump Posts: 6,061
    Yep, strut bushing. Bushings tend to chirp when pinched or worn.
    Shane "Crash" Hill

  • The_MSThe_MS Posts: 5,271 Mega Baller
    Ours chirped when it needed a new impeller.
    Shut up and ski
  • eyepeelereyepeeler Posts: 170 Baller
    +1 on the new impeller.
    Matt Dillon
  • swc5150swc5150 Posts: 2,263 ★★★Triple Panda Award Recipient ★★★
    But with a really stiff prop, and it only happens in gear. That to me wouldn't point to an impeller, unless the problem is two-fold? I suppose it's easy enough to open the motor box and take a listen by the impeller housing.
    Scott Calderwood
  • Chef23Chef23 Posts: 5,962 Mega Baller
    Different things happen when under load vs just revving the engine. I would try the impeller first it is a 10 minute job and it never hurts to put a new impeller in.
    Mark Shaffer
  • Bill GladdingBill Gladding Posts: 109 Baller
    I have been in the marine business since 1979 and seen on a number of occasions where the rubber in the strut bearings will swell tightening the propeller shaft to he point it cannot be moved by hand. Since you hear it going in gear I would bet it is the shaft starting to turn with its lubricating water squeezed out. Once it starts rotating water works its way back in and the noise ceases. I have yet to have anyone explain why this happens. If itsn't causing you any grief I am not sure I would worry about it unless it continues to swell and tighten.
  • MrBMrB Posts: 146 Baller
    It chirps all the time now when i put in gear, I did put a new impeller in this spring, no noise coming from there. @Bill Gladding , it is not causing grief but it is not normal for my boat. Is there anything I could do or replace? Should I take it in for repair? Where is the strut bushing? Can I check shaft alignment or I need a mechanic? By the way, I have not hit anything in a long long time.
  • swc5150swc5150 Posts: 2,263 ★★★Triple Panda Award Recipient ★★★
    Your shaft bushing is the bushing in the strut, between the strut housing and prop shaft. It's not a fun change out, for a DIY'r.
    Scott Calderwood
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