Mercruiser engine aglinment

Discussion in 'Powerboats' started by Sprint 18.5, Aug 10, 2021.

  1. Sprint 18.5
    Joined: Aug 2021
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    Location: Texas

    Sprint 18.5 Junior Member

    Have an engine aglinment issues with a new motor install due to the rear motor mount bushing were upside causing the rear to sit high. So I order and received new bushings and appears they can be mounted up or down so I install them with the rear bolts dropping much easier and torque to 35ft lbs. To get in the ball park I inserted a pvc pipe with equal space from top to bottom but left to right/side to side is off not letting aglinment tool to enter. Any suggestions or help would be greatly appreciated.
     
  2. baeckmo
    Joined: Jun 2009
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    baeckmo Hydrodynamics

    Might be the front being low instead..., have you checked?
     
  3. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    Pictures, please. As informative as possible.
     
  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

  5. Sprint 18.5
    Joined: Aug 2021
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    Sprint 18.5 Junior Member

    Yes! I found the center with a one inch pipe seated flush in and went with alignment tool afterwards. I been hi, low and all in between.
     
  6. Sprint 18.5
    Joined: Aug 2021
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    Sprint 18.5 Junior Member

    Pic front front and rear really didn’t show much and really don’t know what other info. New motor, new bushing and parts.
     
  7. Sprint 18.5
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    Sprint 18.5 Junior Member

    Yes all in the correct order.
     
  8. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    There is no lateral adjustment. Is the gimbal bearing able to move in all directions? If it is stuck it will feel like there is an alignment problem when actually the gimbal is not aligned.
     
  9. Sprint 18.5
    Joined: Aug 2021
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    Location: Texas

    Sprint 18.5 Junior Member

    Yes the gimbal bearing spins left and right freely. The rear motor mounts don’t sit evenly no matter how I adjust the front of the motor. When I torque them down on has more space between the fiber washer than the other side.
     
  10. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    That sounds like the mounts were not pressed completely into the bellhousing.
     
  11. Sprint 18.5
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    Sprint 18.5 Junior Member

    I pulled motor twice and and bell housing on eve and are seated to the retainer ring.
     
  12. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    In that case I assume you could see that both mounts protrude the same amount.
     
  13. Sprint 18.5
    Joined: Aug 2021
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    Sprint 18.5 Junior Member

    I checked with V caliper and flush mounted. I’m completely baffled along with three other employees that are pretty sharp. It’s like one leg of a chair shorter not sitting down. When I tighten down that one rear mount the rubber pushes down to seat on that one side only. Bell housing won’t rest on fiber washer.
    Have had motor in and out for several months working on off an on frustrated. All boat shop down here on South Gulf Coast have no experience on inboard/outboard. Nothing but saltwater fishing boats down here.
     
  14. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    It sound like there is some kind of interference. How is the shifter cable routed?
     

  15. Sprint 18.5
    Joined: Aug 2021
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    Location: Texas

    Sprint 18.5 Junior Member

    Power steering hoses out along with exhaust, all cables up high tied up clean no obstruction. The the one shift cable routed properly from factory clear is there with no visual markings. I appreciate all you help and question and will take some pics soon.
     
    DogCavalry likes this.
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