Great Planes 27% Extra 330S ARF - GPMA1413 - Manual (Page 19)

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4. For the Fuji-Imvac BT-43EI-2 engine installation or other
gas engines, use one of your #10 engine mounting bolts (not
included) and a couple of washers to draw the blind nuts (not
included) into the back of the fi rewall. If using the included
adjustable engine mount, use an 8-32 x 1" [25mm] SHCS
and a couple of washers to pull the included 8-32 blind nuts
into the back of the fi rewall.
If mounting an electric motor skip to “Mount the Electric
Motor” on page 26.
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5. If using a gas engine, mount the engine with the engine
mounting bolts and lock washers (not included), then skip
to “Assemble the Fuel Tank.” If mounting a glow engine,
mount the engine mount halves to the fi rewall with four 8-32 x
1-1/4" [32mm] SHCS and #8 fl at washers and lock washers,
but do not tighten the screws all the way yet.
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6. With the fuselage lying on its left side in your building
stand, place the engine on the engine mount. Adjust the two
halves of the engine mount to fi t the engine. Then tighten the
engine mount bolts.
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7. Use a small C-clamp or two to hold the engine to the
mount so that the front of the drive washer (or the backplate
of the spinner) is 6-3/4" [170mm] from the fi rewall. Use a
Great Planes Dead Center
™ Hole Locator or a drill bit to
mark the engine mounting holes into the engine mount.
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8. Take the engine off the mount. If you have a drill press
that will drill the holes squarely, remove the mount from the
fi rewall and drill #29 holes at the marks. If you don’t have a
drill press, you can leave the mount attached to the fuselage
for drilling the holes.
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9. Use an 8-32 tap to cut threads into the holes. Remount
the engine mount to the fi rewall, but don’t tighten the bolts
yet. Mount the engine to the mount with four 8-32 x 1" [25mm]
SHCS and #8 lock washers. Center the engine mount on the
engine mount bolts, then fully tighten the engine mount bolts.
ASSEMBLE THE FUEL TANK
If using a gasoline-powered engine the fuel tank setup
will have to be converted to work with gas using the
hardware listed in the front of the manual. Follow these
instructions for assembling your fuel tank for the type of
engine you are using.
Glow Engines
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1. Cut two of the aluminum tubes that came in the fuel tank
to a length of 1-1/2" [40mm]. (This can be done by rolling the
tubing on your workbench with a #11 blade.) Assemble the
stopper as shown in the photo. Bend the long tube so it will
be at the top of the tank. Cut the fuel lines so the clunks
cannot contact the back of the tank–otherwise they could
get stuck. Note that one of the lines will be used for fueling
and defueling and the other line will be the pickup line that
goes to the carburetor. The bent tube will be connected to
the vent/pressure line that will go to the pressure tap on the
muffl er. Proceed to step 4 to fi nish assembling the fuel tank.
Gas Engines
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1. Cut one of the brass tubes included with the Sullivan
conversion kit in half, making two approximately 1-3/4"
[45mm] tubes. Solder a Du-Bro fuel line barb onto one end
of each of the three tubes.