Top Flite TOPA0905 - Manual (Page 31)

Install the Fuel Tank for the
O.S. 1.60 Four-Stroke Engine
❏
1. Assemble the fuel tank as shown in the sketch.
When tightening the center screw be sure not to over
tighten it. You just want it snug enough to pull the
rubber stopper tight against the tank.
❏
2. The up-draft carburetor requires that the fuel
tank be mounted as low as possible in the fuselage.
Because of this the tank cannot be mounted in the
area designated in the model. To move the tank
location to the bottom of the fuselage, cut the floor
out of the fuel tank area, locate the tank to the
bottom of the fuselage and drill new holes for the fuel
line so they can exit out from the bottom of the
firewall in line with the fuel inlet on the carburetor.
This process will be cumbersome due to the limited
amount of space you have to work in. Patience will
help to assure a good installation.
Install the Cowl and Dummy Engine
❏
1. Remove the muffler. This will make the installation
of the cowl easier.
❏
2. Cut out the center of the dummy engine. Slide it
over the engine crankshaft. Mark the area where the
dummy engine covers the cylinder head of your
engine.
(If you are installing a twin cylinder engine
then you must cut out the dummy engine to provide
cooling for both cylinders). Remove the dummy
engine and cut out the area you marked. Note: When
installing the dummy engine, one cylinder head should
be at the top of the cowl. Trim the cowl as needed to
get it to fit completely forward into the cowl.
❏
3. Drill 1/8" [3mm] holes in each of the rocker covers
and the center of the engine for the aluminum pushrod
tubes. If you would like to add some additional detail
you may wish to use wire (not included) as a spark plug
lead. We used a 20 gauge red wire and then drilled
1/16" [1.6mm] holes in each cylinder for the wire.
❏
4. Paint the engine flat black. After the paint dries
install the aluminum tubes and wire into the holes
you drilled. On the backside of the engine apply a
small amount of glue to each wire and aluminum
tube to hold them in place.
FUEL TANK
S ILICONE
FUEL LINE
FUEL CLUNK
FUEL
PIPE
PRE SS URE
TAP TO
MUFFLER
TO NEEDLE
VALVE
FIREWALL
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