Great Planes Top Speed - GPMB1050 - Manual (Page 9)

❏
3. Slide the Pushrod Seals onto the mounts. Use
scissors to trim the end of the seal 1/32" [.8mm] so the
pushrod can exit. Use the rubber O-Rings to secure the
seals onto the mounts.
❏
4. Temporarily install the radio box using two rubber
bands as shown in step 7.
❏
5. Thread a 2-56 Nut onto each of the 17-1/2" Pushrods.
Add a Silicone Retainer to a Threaded Metal Clevis and
thread the clevis onto the pushrod about 14 turns.
❏
6. Remove two of the four arms from a cross servo arm.
Switch your radio system on and center the steering trim.
(See your radio manual for details.) Install the servo arm so
it is 90-degrees to the centerline of the servo. Switch your
radio system off and proceed to the next step.
❏
7. Slide a pushrod through one of the pushrod seals in the
radio box. Attach the clevis to the steering arm of the engine.
❏
8. Position the engine so it is 90-degrees to the transom.
Enlarge the outer most hole in the servo arm using a 5/64"
[2mm] drill bit. Mark one of the pushrods where it crosses
the servo arm. (Make sure the radio box is fully seated
against the hull before marking the pushrod.)
❏
9. Make a 90-degree bend in the pushrod on your mark,
then cut off the excess wire 3/8" [9.5mm] above the bend.
Insert the bent wire into the servo arm, then secure the
linkage using a Nylon FasLink
® as shown in the sketch.
Bend the pushrod if necessary to provide clearance around
the fuel tank.
❏
10. Locate the 24" [610mm] Pushrod Tube and cut it to a
length of 11-1/2" [293mm]. Roughen the outside of the tube
using 180-grit sandpaper. Slide the tube 2-1/2" [64mm] into
the remaining hole in the radio box as shown. Use medium
CA to glue the tube to the radio box.
GP
9