Hirth F-23 - Page 29

29
Maintenance
Intervals in hrs.
5
h
r
10
hr
12
hr
25
hr
50
hrs
75
hrs
100
hrs
125
hrs
150
hrs
175
hrs
200
hrs
225
hrs
250
hrs
275
hrs
300
hrs
325
hrs
350
hrs
48
check cylinder
bore for
scratches
x
x
x
49
lubricate exhaust
ball joints
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
50
replace exhaust
springs
x
x
x
51
replace gaskets if
leaking or
removed
x
52
replace ignition
box
x
53
replace spark
plug wires
x
x
x
54
replace multi-
grooved belt on
reduction drive
x
x
x
x
x
x
x
55
replace 5-v-belts
on re-drive
x
x
x
x
x
x
x
x
x
x
x
x
x
x
56
disassemble,
inspect &
lubricate recoil
starter
x
57
check/re-torque
prop bolts (as
per manufactur-
er’s instruction
58
59
60
61
62
63
Items #58-63 are for you to add additional points to check, such as accessories. At 500 hours total time, the
engine is to be disassembled and all points checked, service as required, replace rings and start the maintenance
schedule over at the beginning, for example, install as per instructions, complete engine break-in and start this
maintenance schedule at the 2 hour inspection. At 1,000 hours total time, every moving part as well as all other
parts are to be replaced.