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2"
51 mm
Back Edge Of
Motor Tube
Thrust
Ring
Thrust
Ring
Flange
Motor
Hook
1. Cement the thrust ring flange (1/16"/1.6 mm thick) to the
thrust ring (7/16"/11 mm long). Set the thrust ring assem-
bly aside to dry.
2. Find the line drawn along the side of the motor tube. Using
the Location Guide printed along the top edge of this
instruction sheet, cut a 1/4" (6 mm) long slot 4-5/8"
(117mm) from the back end of the motor tube and next to
the line on the motor tube as shown.
3. Using the Location Guide, make a mark along the motor
tube line 4-1/16" (103 mm) from the back end of the motor
tube. This mark locates where the back edge of the front
FIN-LOK™
Ring
NOTE: FROM THIS POINT ON, DO NOT USE ANY
CEMENT UNTIL REACHING ASSEMBLY STEP 5.
1. With their motor hook channels aligned with the motor
hook, slide a FIN-LOK™ ring and then the middle center-
ing ring over the front end of the motor tube. Push on the
middle AERO-FIBRE™centering ring until the back edge
of the FIN-LOK™ ring is moved to the forward most mark
made in Step 3 above. (NOTE: The rings are designed to
be a tight fit on the motor tube. If the rings are difficult to
slide onto the motor tube, round the inside edges of the
rings with sandpaper. If the FIN-LOK™ rings need to be
3"
76 mm
4-1/16"
103 mm
4-5/8"
117 mm
Front Edge of
Tube Coupler
Back FIN-
Marking Guide
LOK™ Ring
Motor
Tube
Thrust Ring
Assembly
Back Edge Of
Front FIN-LOK™
Ring
MOTOR TUBE ASSEMBLY
Line
FIN-LOK™Ring
Location Marks
FIN-LOK™ ring will be. Make another mark 2"(51 mm)
from the back end of the motor tube. This mark locates
where the front edge of the rear most FIN-LOK™ ring will
be.
4. Insert the tab of the motor hook into the slot cut into the
motor tube. Use a small dowel to apply several drops
of cement around the inside of the motor tube just
behind where the motor hook comes through the
motor tube wall. Then, with the thrust ring flange facing
the back of the motor tube, insert the thrust ring assembly
into the motor tube until it stops, against the motor hook
tab.
FIN-LOK™ ASSEMBLY
Motor
Tube
turned after they are on the motor tube, use a small piece
of cloth to provide a better grip.)
2. Slide the other FIN-LOK™ ring over the back end of the
motor tube until the front edge of the FIN-LOK™ ring is
at the rear-most mark made in Step 3.
3. Using the line on the motor tube as a guide, gently twist the
back FIN-LOK™ ring slightly until the fin locks of the back
FIN-LOK™ ring are aligned with the fin locks of the front
FIN-LOK™ ring.
2
LOCATION
GUIDE
Motor
Hook
Slot
Slot For
Motor
Hook
2"/51mm And 4-1/16"/103mm
From Back Edge Of Motor Tube
Front
End
1/4"
1/2"
13 mm
6 mm
Front
End
4-5/8"/117mm
From Back Edge of
Motor Tube
Middle
Centering
Ring
Motor
Hook
Channels
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