Specifications

8
TORQUE SPECIFICATIONS
Two Cycle Engines
NOTES
Torque specifications listed should not be confused with the torque value observed on engines which have been
run.
The torque specifications take relaxation into account so sufficient clamping force exists after an engine has reached
operating temperature.
Torques listed are intended to cover highly critical areas. More extensive torques are found in the respective repair
manual.
840 - 870 and TH139SA Two Cycle Engine Series
Location
Inch lbs.
Torque
Nm Engine Designation
TVS TVXL TH139SA HXL
Crankcase to Cylinder 120-204 13.5-23
   
Flywheel Nut 360-420 41-47.5
   
Adapter Plate to Cylinder 160-220 18-25
 
TC / TM Two Cycle Engine Series
Location
Inch lbs.
Torque
Nm Engine Designation
TC200 TC300 TCH200/300 TM049
Cylinder to Crankcase 80-95 9-11
  
Crankcase Cover to Crankcase 70-100 8-11
  
Flywheel Nut 190-250 21.5-28.5
   
Crankcase Cover to Cylinder 105 12

Two Cycle Engine Series (AV520/600, TVS600, AH520, AH/HSK600, TH and TV)
Location
Inch lbs.
Torque
Nm Engine Designation
AV520/600 TV035XA TVS600 AH/HSK600 TH098 AH520
Connecting Rod 40-50 4.5-5.5
   
Housing Base to Cylinder 80-120 9-13.5
   
Cylinder Head to Cylinder 100-140 11-16
   
Flywheel Nut AV (Point Ignition)
(670 Series AV520 and All AV600)
216-300 24.5-34
 
Flywheel Nut (C.D. Ignition) 264-324 30-36.5
   
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