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TM 10-3930653-14&P
4-2-1 SERVICE DATA AND SPECIFICATIONS
4-2-1-1 GENERAL SPECIFICATIONS
Engine model..............................................................................................................H20
Cylinder arrangement.................................................................................................4, min-line
Displacement
cc (cu in) ...................................1,982 (120 9)
Bore x stroke
mm (in)......................................87.2 x 83 (3 433 x 3 268)
Valve arrangement .....................................................................................................O H V.
Firing order .................................................................................................................1-3-4-2
Number of piston rings
Compression ..................................................................2
Oil ...................................................................................2 + I spacer
Total number of piston rings.......................................................................................5
Compression ratio ......................................................................................................8 2 1
Fan belt size
mm (in)......................................10 x 1,035 (0.39 x 40 75)
Engine idle speed
rpm............................................650
4-2-1-2 INSPECTION AND ADJUSTMENT
(1)
Valve mechanism
Valve clearance (Hot)
Intake
mm (in)....................................... 0.38 (0.015)
Exhaust
mm (in)....................................... 0.38(0.015)
Valve head diameter
Intake
mm (in) ...................................... 42.0 to 42.2 (1.654 to 1 661)
Exhaust
mm (m) ...................................... 32 00 to 32 2 (1 260 to 1.268)
Valve length
Intake
mm (in)....................................... 109.05 to 109 365
(4.2933 to 4 3057)
Exhaust
mm (in)....................................... 108.9 to 109 365
(4 2874 to 4.3057)
Valve stem diameter
Intake
mm (in)....................................... 8.657 to 8.670 (0 3408 to 0.3413)
Exhaust
mm (in)....................................... 8 627 to 8.640 (0 3396 to 0 3402)
Valve spring free length
Intake and exhaust
mm (in)....................................... 49 0 to 47 5 (1.929 to 1 870)
Valve spring pressured length (Valve open)
Intake and exhaust
mm/kg (in/lb) .............................. 39 0/28.5 to31 5
(1.535/62 8 to 69.5)
Valve spring assembled height (Valve closed)
Intake and exhaust
mm/kg (in/lb) .............................. 30 4/60 8 to 61.5
(1 197/134.1 to 135 6)
4 - 17
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