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Thread: Airlog mounting problem

  1. #1
    Registered User totÚpt's Avatar
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    Airlog mounting problem

    Goodmorning all!!..
    Among the many problems that I faced by disassembling and reassembling the carburettors there is one particularly boring because it appears when the work is almost finished.
    If the carburettors are reassembled in a not perfect reciprocal position (and this can happen because there is a bit of space between the screws and the holes) the air log does not enter in the studs. This means that you need to loosen the carburetors again ...
    What methods do you use to mount the carburetors without this happening?
    Francesco
    Francesco
    190 SL 1961 - (ex US OZF-810)
    Sorry for my "Google" English...

  2. #2
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    Re: Airlog mounting problem

    Francesco:
    Take a look at the tip on page 7 of the July/August 2018 "Enthusiast".
    Greg Peirce
    Beaufort, SC

  3. #3
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    Re: Airlog mounting problem

    hi Greg,
    unfortunately I don't have the newsletters..
    Francesco
    Francesco
    190 SL 1961 - (ex US OZF-810)
    Sorry for my "Google" English...

  4. #4
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    Re: Airlog mounting problem

    Francesco...here is the text portion of the article without the photographs.

    Air Log Installation

    Installing the carburetors is no small job, and there is nothing more frustrating than completing the task only to find the holes in the air log won’t align with the 8 studs of the carbs. Of course, the proper procedure is to loosely install the carbs, mount the air log, then tighten the manifold bolts to the final spec. The problem is when the air log is in place, it is almost impossible to reach the bottom manifold bolts. You can tighten just the top ones, remove the air log, then tighten the bottom nuts; but given the importance of eliminating air leaks, it is really preferable to tighten the manifold bolts evenly in a star pattern.
    The carbs can also move slightly during final tightening, putting you right back to where you started.
    One solution is to make a “template” to align the carbs to the air log holes, and also providing clearance during installation. A little precision is required in drilling the template, and I used 3/16” thick aluminum to mimic the thickness of the air log flanges. A 1 1/2” x 15” flat bar will cover 4 holes (enough to align both carbs) and still clear the choke plates on installation.
    You could just enlarge the holes in the air log to allow for a little misalignment, but removing material should be a last resort.
    Greg Peirce
    Beaufort, SC

  5. #5
    Registered User totÚpt's Avatar
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    Re: Airlog mounting problem

    Hi Greg !
    that's what I thought I would do. A plate used as a template for carburetor alignment.
    My idea is to make a template with 4 + 4 holes, but from what you say only 2 + 2 holes should be sufficient.
    I think I'll build the template right away !!
    Thanks!!
    Francesco
    Francesco
    190 SL 1961 - (ex US OZF-810)
    Sorry for my "Google" English...

  6. #6
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    Re: Airlog mounting problem

    I found a photo of mine.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Greg Peirce
    Beaufort, SC

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