Engine Specifications
600 SRM 496
Throttle Linkage Adjustment
Whenever the throttle linkage is disassembled, the
throttle cable must be adjusted after installation.
GASOLINE ENGINES
For the H1.50-1.75XM, 2.00XMS (S/H25-35XM,
40XMS) units, see Gasoline Fuel System 900 SRM
547 for the correct adjustment procedure. For the
S/H2.00-3.20XM(S/H40-65XM) units, see Gasoline
Fuel System 900 SRM 502 for the correct adjust-
ment procedure.
LPG ENGINES (IMPCO)
For earlier units, see LPG Fuel System 900 SRM
523 for the correct adjustment procedure.
LPG ENGINES (AISAN)
For later units, see LPG Fuel System, Aisan
Open-Loop 900 SRM 925 or LPG Fuel System,
Aisan Closed-Loop 900 SRM 948 for the correct
adjustment procedure.
Engine Specifications
ENGINE DATA
Engine Type........................ In-line, Four Cylinders
Bore × Stroke (M4-2.0G).... 86 mm (3.39 in.) ×
86 mm (3.39 in.)
Bore × Stroke (M4-2.2G).... 86 mm (3.39 in.) ×
94 mm (3.70 in.)
Displacement (M4-2.0G) .... 1998 cm
3
(121.9 in.
3
)
Displacement (M4-2.2G) .... 2184 cm
3
(133.2 in.
3
)
Firing Order ....................... 1 - 3 - 4 - 2
Compression Ratio ............. 8.6 : 1
Compression Pressure ....... 1131 kPa (164 psi) @
270 rpm
Engine Timing (No. 1 Cylinder):
– Gasoline.......................
– LPG, H1.50 -1.75XM,
2.00 XMS (S/H25-35XM,
40XMS)...........................
– LPG, S/H2.00 -3.20XM
(S/H40-65XM) ................
0 /TDC
8 BTDC
9 BTDC
Engine Speed, M4-2.0G (IMPCO):
– Idle Speed....................
– Governed Speed ..........
725 ± 25 rpm
2650 ± 50 rpm
Engine Speed, M4-2.0G and M4-2.2G (AISAN):
– Idle Speed....................
– Governed Speed ..........
800 ±25 rpm
2750 ±50 rpm
Stall Speed (New M4-2.0G Engine):
– Gasoline.......................
– LPG..............................
1980 ±50 rpm
1930 ±50 rpm
Stall Speed (M4-2.0G Engine With 30 Hours or
More):
– Gasoline.......................
– LPG..............................
2100 ±50 rpm
2050 ±50 rpm
Stall Speed (New M4-2.2G Engine):
– Gasoline.......................
– LPG..............................
2150 ±50 rpm
2100 ±50 rpm
Stall Speed (M4-2.2G Engine With 30 Hours or
More):
– Gasoline.......................
– LPG..............................
2270 ±50 rpm
2220 ±50 rpm
Oil Pressure @ 2400 rpm ... 226 to 362 kPa
(33 to 53 psi)
THERMOSTAT
Starts to Open .................... 82 ±1.5 C (180 ±3
F)
Fully Open .......................... 95 ±1.5 C (203 ±3
F)
CYLINDER HEAD
Height ................................. 91.25 to 92.05 mm
(3.620 to 3.624 in.)
Distortion Limit ................. 0.15 mm (0.006 in.)
Grinding Limit ................... 0.20 mm (0.008 in.)
26
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