Stiga TRE 0702 - Technical Data and Specifications; Identification; Technical Data; Adjustments

Release 00 - 03/2018
Engine TRE 0701-TRE 0702-TRE 0801
pag. 9
Service manual
3.1. Identication
Every motor is marked with a serial number on the
base and applied on the cowl; this serial number
can identify:
• ••• ••••
TREXXXX
XXX
The serial number must be reported on every ope-
ratingsheetinthewarrantyapplicationandisfun-
damental for identifying and ordering spare parts.
3.2. Technical data
TRE 0701 TRE 0702 TRE 0801
Displacement 432 cc 414 cc 452 cc
Bore 90 mm 88 mm 92 mm
Stroke 68 mm
Minimum speed (SLOW) 1850 (±150) r.p.m.
Maximum speed (FAST) 2950 (±250) r.p.m.
Oil sump capacity 1.20 litres
Weight 32 kg
3.3. Adjustments
Distancebetweensparkplug
electrodes
0,6 - 0,8 mm
Coil air gap 0,25 - 0,40 mm
Inlet valve clearance 0,10 - 0,15 mm
Exhaust valve clearance 0,15 - 0,20 mm
Generator charge
3,0 ÷ 4,0
Ω (Ohm)
Daily progressive
number
3. TECHNICAL DATA AND SPECIFICATIONS
3.4. Expendable materials
Petrol
Unleaded (green)
minimum 90N.O.
Engine oil
- from 5 to 35 °C
- from -15 to +35 °C
SAE 30 - 10W30
Spark plug
RN12YC (Champion)
or equivalent
3.5. Use limits
The following table gives the use limits of certain
components subject to wear, after which the com-
ponent must be replaced.
TRE 0701
TRE 0702
TRE 0801
Brushes lenght starter push bot-
ton
8.5 ÷ 12 mm
Compression 4.2 bar
Minimum inlet valve stem diameter 6.425 mm
Minimum exhaust valve stem
diameter
6.375 mm
Minimum inlet valve head rim
thickness
0.5 mm 0.8 mm
Minimum exhaust valve head rim
thickness
1.0 mm
Valveseatwidth 1.5 mm
Minimum valve spring length 37.5 mm
Maximumgapbetweenendsof
cylinder rings
0.8 mm
Max. axial gap for compression
rings
0.15 mm
Minimum gudgeon pin diameter 19.95 mm
Max. gudgeon pin-piston seat
diameter
20.04 mm
Max. connec-
ting rod dia-
meter
gudgeon pin
side
20.07 mm
crank side 36.07 mm
Diameter connecting rod’s pin on
engine shaft
35.93 mm
Verify the engine shaft extremes 0.10 mm
Diameter Pump seat on camshaft 15.916 mm
Diameter aspiration cam 32.15 mm
Diameter discharge cam 32.35 mm
Diameter oil pump seat 29.21 mm
Height pump cylinder 9.95 mm
Cylinder/seat clearance on the
pump
0.26 mm
Year of
manufacture
Date
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