4-CYCLE OVERHEAD VALVE ENGINES - Small Engine Discount

OVERHEAD VALVE TORQUE SPECIFICATIONS
The torque specifications listed in this chart are to be used for replacing components after disassembly, not for
checking an existing engine bolt torque. Checking a torque value on a new or used engine may be lower due
to torque relaxation that occurs on all engines from thermal expansion and contraction. However, sufficient
clamping force exists and a re-torque is not necessary.
Specifications below ten ft. lbs. torque are listed only as in. lb. measurements to encourage the use of an inch
pound torque wrench for greater torque accuracy.
In. lbs.
ft.
lbs.
Nm
OVRM
OHH50-65
OHSK50-70
OVXL,
OHM,
OVM, &
OHSK
OHV
11-13
OHV
110-135
206 Series
OHV135-145
203 Series
OHV15-17.5
204 Series
3
Cylinder
Head Bolts 230
19
26
X X X X X X
Conn.
Rod Bolts 105
- 12
X X
Conn.
Rod Bolts 220
18.
3 24.
8
X X X X
Cyl.
Cover or Flange 115
9.
5 13
X X
Cyl.
Cover or Flange 125
10.
5 14
X X X X
Flywheel
Nut 450
35
51
X X
Flywheel
Nut Cast Iron 550
46
62
X
Flywheel
Nut 700
58
79
X X X X
Spark
Plug 250
21
28
X X X X X X
Ign.
Mounting (Direct to Cyl.) 45
- 5 X X
Ign.
Mounting (Direct to Stud) 45
- 5 X X X X
Ign.
Mounting Stud to Cyl. 40
- 4.
5
X X X X
Intake
Pipe to Head 115
- 13
X X X X X X
Carburetor
to Intake Pipe 70
- 8 X X X X X X
Fuel Shut Off Solenoid to
Carb.
17
- 2 X X X
Muffler
Mtg. (Flanged) 75
- 8.
5 X
Muffler
Mtg. (Rect.) 65
- 7.
5 X
Muffler Mtg.
( Oval) 45
- 5 X
Muffler
Mtg. 100
- 11.
5
X
Muffler (Flanged) to Manifold
( Flanged) 200
16.
5 22.
5
X X
Muffler
Clamp to Manifold 80
- 9 X
FLAT WASHER
2
4
1
5
5
1
86
4
TORQUE SEQUENCE
OVRM / OHH, OHSK
2
BELLEVILLE WASHER
(CROWN TOWARD BOLT HEAD)
3
6
TORQUE SEQUENCE
OHV 11 - 17, OHM, OVM, OHSK110 - 120
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