Install The Fuel Tank (Gas Engine) - GREAT PLANES Perfomance Series Sukhoi SU-31 1.60 ARF Instruction Manual

❏
3. Measure the outer diameter of the boss on the blind nuts
you will use to mount the engine (gasoline engine mounting
hardware is not included). The 10-32 blind nuts we use will
require a 1/4" [6mm] bit. Use the appropriate bit for your
hardware to drill holes at the four marks you made on the
fi rewall. To reduce tear-out, make pilot holes with a smaller
bit fi rst, then fi nish the holes with the correct diameter bit.
Insert a 10-32 blind nut into the back of each hole. Use a
10-32 x 1-1/4" [32mm] SHCS and a few #10 fl at washers to
draw the blind nuts tight against the back of the fi rewall.
❏
4. Attach the ball stud to the throttle arm on the carburetor
with a 2-56 nylon lock nut. Mount the engine inverted using
four 10-32 x 1-1/4" [32mm] (not included) SHCS, four #10
fl at washers (not included), four #10 lock washers (not
included), and threadlocking compound. The distance
from the fi rewall to the front of the drive washer is 6-3/4"
[171mm] when installing the Fuji-Imvac BT-43 EI-2 engine.
This distance may vary slightly with other engine models.
If installing another model engine, effort should be made to
maintain a similar drive washer distance to the fi rewall.

Install the Fuel Tank (Gas Engine)

The fuel line and stopper included with the Sukhoi SU-31 1.60
ARF is NOT gasoline safe. Gasoline will degrade the rubber
stopper and silicone fuel tubing supplied. You will need to
purchase a gasoline safe stopper and gasoline safe tubing
to use for the fuel system on this model. The Sullivan #484
Gasoline/Diesel fuel tank conversion kit (SULQ2684) works
well for this.
❏
1. Remove the stopper from the included fuel tank and
replace it with a gas safe stopper as mentioned above.
❏
2. Assemble the stopper using Du-Bro #813 1/8" [3.2mm]
I.D. fuel line barbs and 1/8" [3.2mm] brass tubing as shown.
Solder the barbs to the brass tubing but be careful not to
overheat the assembly as it could cause damage to the
rubber stopper.
ASSEMBLING A GASOLINE SAFE STOPPER
1. Cut one of the two brass tubes included with the Sullivan
conversion kit in half (approximately 1-3/4" [45mm] pieces).
Prepare the tubes for solder by scuffi ng up the ends with
sandpaper and cleaning them with alcohol.
23