Great Planes U-Can-Do 3D 46 ARF - GPMA1269 - Manual (Page 15)

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2. Trim the spreader bars from both halves of the engine
mount. Mount the engine mount to the firewall with four
6-32 x 3/4" [19mm] SHCS, #6 flat washers and #6 lock
washers, but do not fully tighten the bolts.
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3. Adjust the width of the mount to fit the engine. Center
the molded-in “tick” marks on the engine mount equally to
the left and right of the vertical line on the firewall. Tighten
the mounting bolts.
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4. Place the back plate of the spinner on the engine.
Note: Depending on your engine choice, it may be
necessary to enlarge the hole in the back plate.
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5. Use small clamps or another method to temporarily
secure the engine to the mount with the back plate of the
spinner 5" [150mm] from the firewall. Use the Great Planes
Dead Center
™ Engine Mount Hole Locator (GPMR8130) or
your preferred method to mark the engine mount holes onto
the engine mount.
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6. Remove the engine from the mount. Drill #36 holes
through the mount at the marks you made. Tap 6-32 threads
into the mount. Mount the engine to the mount with four
6-32 x 3/4" [19mm] SHCS, #6 flat washers and #6 lock washers.
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1. Use epoxy to glue the four 3/8" x 3/4" x 3/4"
[9.5 x 19 x 19mm] maple cowl mounting blocks to the firewall
in approximately the locations shown. Note: It may be
necessary to shape the top of the top blocks so they align
with the fuse as shown in the photo.
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2. Hold a ruler to the fuse centered on one of the cowl
mounting blocks. Use a felt-tip pen to draw a line directly
onto the fuse along the straightedge.
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3. Mark a reference point on the end of the line exactly
4" [100mm] from the center of the cowl mounting block.
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4. Mark the location of the remaining three cowl mounting
blocks the same way.
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5. Place the cowl on the fuse. Mount the spinner and prop
to the engine. Position the cowl on the fuse so it is in
alignment with the spinner. Be certain there is at least a
3/32" [2.5mm] gap between the front of the cowl and the
back plate of the spinner. It may be helpful to have an
assistant hold the cowl for you.
Mount the Cowl
15