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Rev 508jf
sure that your engine will be centered over the alignment marks on the firewall. Drill the holes
and install the engine, using a thread-locking
compound on the bolts.
Cut a block of 1/2” thick scrap balsa approximately
1” x 1 3/4” to act as a spacer to keep the fuel lines
from crimping against the firewall. Glue the block
against the back of the firewall as shown in the photo.
ASSEMBLE THE FUEL TANK. Assemble the fuel
tank as a three line (vent, fill/drain and carburetor)
system. The vent tube is bent up to the top of the tank
and the fill/drain tube is bent down to the bottom of
the tank. Use the black tubing provided for
the clunk line. It won’t harden like the
yellow tubing does.
INSTALL THE FUEL TANK. Drill a 1/4”
hole for the carburetor fuel line in a
convenient location in the firewall. Drill
holes in the bottom of the engine box just
behind the firewall for the vent and fill lines.
Feed the fuel lines through the holes and push the tank into the engine box, up against the spacer
block.
Glue the tank retainer across the rear of the box to hold the tank in place. If you need to remove
the tank later, you can just pop the retainer off.
GLUE IN THE ENGINE BOX. Slide the engine box into the fuselage until the back of the
propeller driver is 10” from the front fuselage former. (Approximately 9” from the front of the
rounded off ring on the front of the fuselage.) Draw a line around the front of the box where it
