Great Planes Cessna 182 Skylane 40 ARF - GPMA1228 - Manual (Page 9)

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1. Cut or break the “spreader bar” from each engine mount
half. Carefully trim any extra material left by the spreader
bar from each mount half. The surfaces where the spreader
bars were attached must be smooth to allow the mount
halves to fit together. Trim the flashing off any rough edges
if necessary.
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2. Draw a horizontal line on the firewall 2-3/16" [56mm]
from the top of the fuselage. Draw a vertical line on the
firewall along the left side of the top and bottom stringers as
shown in the photo.
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3. Cut the engine mount template from the back cover
page and tape it to the firewall as shown above. At the
locations on the template, drill four 1/8" [3mm] holes in the
firewall for the engine mount blind nuts.
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4. Install four 4-40 blind nuts to the inside of the firewall.
Pull the blind nuts into the back side of the firewall using a
4-40 machine screw (with a flat washer under the head of
the bolt). Fit the two halves of the engine mount together.
Use four #4 flat washers and four 4-40 x 3/4" machine
screws to secure the engine mount to the firewall. Do not
tighten the screws at this time, as the mount must be
adjusted for the engine.
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5. Test fit your engine into the mount. Adjust the width of
the rails to fit the engine snugly. Tighten the mount screws
to allow marking the engine mounting holes without moving
the rails.
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6. Position the engine on the engine mount rails so the
propeller thrust washer (or spinner backplate) is 4-7/8"
[124mm] ahead of the firewall. Use a Great Planes Dead
Center Hole Locator (GPMR8130) (not included) or a
sharpened piece of wire to scribe the four engine mount
holes onto the rails. Use a center punch on the marks to
prevent the drill bit from wandering, then drill 3/32" [2.5mm]
pilot holes through the rails. Be sure to hold the drill
ENGINE INSTALLATION
9