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912ULS Hoisting Methods?

in General Tech Discussion 11 years ago
I am about to install my new 912ULS in my RV-12. I noticed two large unused bolt holes in the top center of the engine's crankcase. Can two appropriately-sized bolts and a cross plate be installed in these two holes and safely used to lift the engine wth an overhead engine hoist? Is this a factory-approved use of these two holes??

Alternatively, I guess I could wrap a high-strength fabric sling around the propellor flange and around the rear of the engine and use the hoist - but the rear of the engine doesn't offer much in the way of unfettered placement for the sling!

Thanks! -- David

  • Re: 912ULS Hoisting Methods?

    by » 11 years ago

    Hi David

    In the past I put a sling under each inlet between cylinder 1/3 and one between 2/4. This means the engine weight is carried by 8x m6 bolts.

    This keeps the engine level and they can't slip off.

    Mark
      
    Report

  • Re: 912ULS Hoisting Methods?

    by » 11 years ago

    Hi David,

    You can use this. This may be what Mark was talking about. Just slip some 1" strap down
    between the cylinders and put a bar of some type through the looped end. When you pull up and get weight on it just make sure the metal bar is not resting on the push rod tubes. There is a flat area out by the valve covers for the bar to rest against. This will support the engine weight, but you may need a small rope to the front prop flange to to keep it level. This way as you slide the engine in place or install the engine mounts there is nothing in your way and the engine can be tilted where ever you need it.
    IMG_1117.jpg (You do not have access to download this file.)

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: 912ULS Hoisting Methods?

    by » 11 years ago

    Hi Roger

    I dont think I explained myself properly.

    I meant looping a strap around the inlet manifold between where it is attached to no. 1 and 3 cylinders and another around the manifold between no. 2 and 4.

    I mean using the inlet manifolds to lift the engine.

    The weight of the engine is supported by eight M6 bolts, four on each manifold.

    Mark
      
    Report

  • Re: 912ULS Hoisting Methods?

    by » 11 years ago

    Thanks guys for the ideas. I eventually just found some nice soft/relatively large diameter rope and looped it around the prop flange and the rear of the engine (being careful not to have the rope resting on any important pieces :P ). Worked fine.
      
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