OWNER'S MANUAL POWER JET Rev. 1.0
©
Copyright by
FLY
Products
s.r.l.
Page
31
9.2 Torque Specification Chart
Item
Fastener
Size
(mm)
Wrench Used
(mm)
Torque
(inch-pounds)
Notes
Cylinder head bolts
Note: Power Jet
were fitted with two
types of cylinder
studs. Standard
studs are chrome by
appearance while
the high
performance studs
are black in
appearance.
M6 10mm
Socket
with inch
pound torque
wrench
80 inch lbs.
Standard head
studs (chrome
finish)
100 inch lbs.
For units
equipped with
grade #8 studs
(black finish)
Use a cross pattern
tightening sequence. Start
sequence at 40-inch lbs.
and increase each step by
20-inch pound increments
until reaching desired
torque setting.
Spark Plug
N/A
13/16”
120 inch lbs. or
10 ft-lbs.
Do not over tighten spark
plug.
Prop bolts
M6
Hex 5mm and
Wrench 10mm
50 inch lbs.
MAX
Tighten them snug, but
don’t crush the wood
Rubber Engine
Mounts
M6
Allen 5
50 inch lbs.
Restrain mounts from
twisting during tightening.
Do not use bolts longer
than stock.
Rubber Engine
Mounts
M8
Allen 6
80 inch lbs.
Restrain mounts from
twisting during tightening.
Do not use bolts longer
than stock.
Misc. M4 bolts
M4
Allen 3
20 inch lbs.
Carburetor bolts
M5
Allen 4
30 inch lbs.
MAX.
Do not over tighten
Reduction housing
nuts
M8
Socket 13mm
145 inch lbs. Or
12 ft lbs.
Inspect for correct seating
of the clutch housing face
to engine casing.
Muffler Flange
M6
Socket 10mm
Tighten nuts till
spring is fully
compressed.
Then back off
nut one ¾ to 1
full turn.
Spring action keeps the
muffler snug against the
cylinder for proper sealing.
