Logo
Results 1 to 8 of 8
  1. #1

    Default MerCruiser alpha one v8 can some help me identify where this noise is coming from

    can some one plz help me out every time I start the engine there is a knocking noise coming behind the engine https://www.youtube.com/watch?v=tpDZdHSt4To plz help

  2. #2
    Join Date
    Jun 2006
    Location
    Spotswood, NJ, USA
    Posts
    3,861

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    guessing the gimbal bearing, remove the drive and retest

  3. #3

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    Quote Originally Posted by landy View Post
    can some one plz help me out every time I start the engine there is a knocking noise coming behind the engine https://www.youtube.com/watch?v=tpDZdHSt4To plz help
    If is the gimbal bearing do i have to change it right away ??

  4. #4
    Join Date
    Jun 2006
    Location
    Spotswood, NJ, USA
    Posts
    3,861

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    gimbal bearings die form water intrusion and the same water gets into the U joints too. A exploding U joint at 4400 rpm is like a small grenade . The whipping action of the center section can destroy the transom housing or create a bigger leak than your bilge pump can handle.
    A $6.00 gasket is a whole lot cheaper

  5. #5

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    I will change it right away thank u some much

  6. #6

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    Quote Originally Posted by landy View Post
    I will change it right away thank u some much
    Now is. Making this knocking noise https://youtu.be/45IHajJS-ZI

  7. #7
    Join Date
    Nov 2005
    Location
    Mt. Zion, Illinois,
    Posts
    528

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    Quote Originally Posted by landy View Post
    Now is. Making this knocking noise https://youtu.be/45IHajJS-ZI
    That sounds like lifter noise.

    KJ

  8. #8
    Join Date
    Jun 2006
    Location
    Spotswood, NJ, USA
    Posts
    3,861

    Default Re: MerCruiser alpha one v8 can some help me identify where this noise is coming from

    I think the growling gimbal bearing was masking the lifter tick. Only now with the drive removed can you hear the lifter. As light as it is I would not worry unless it gets a lot louder

Similar Threads

  1. Help to identify 5.7 noise
    By Simonas in forum Mercruiser Sterndrive Forum
    Replies: 21
    Last Post: 11-04-2017, 09:00 AM
  2. Replies: 39
    Last Post: 07-31-2013, 05:36 PM
  3. mercruiser 4.3 with alpha-one water coming in from behind engine
    By rockbell in forum Mercruiser Sterndrive Forum
    Replies: 8
    Last Post: 02-01-2012, 09:06 AM
  4. Alpha Mercruiser water from the prop port how much should be coming
    By dyoungmc in forum Mercruiser Sterndrive Archive
    Replies: 6
    Last Post: 06-11-2007, 06:58 PM
  5. Loud squeaking noise 43 LX Mercruiser Alpha one
    By helicorp in forum Mercruiser Sterndrive Archive
    Replies: 5
    Last Post: 05-10-2007, 12:25 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •