SPECIFICATIONS
Dimensions - MX-27129A
He
jg
ht
30-1/8 in. (765 mm)
Width.!!'.
33-13/16 in. (859 mm)
Length!!!!!!!!!!!!!!!!!!!!
48
-
5/8 in
- c-
24 mm
)
Number of Cylinders
2
Bore
3-1/4 in. (82.6 mm)
Stroke
3 in
- (
76
-
2 mm
)
Displacement 49.8 cu in. (716 cu cm)
Compression Ratio 7.0 to 1
Compression (sea level) 105 to 110 psi (7.38 to 7.7.3 kg/sq cm)
Engine Power (1800 rpm) 10.2 BHP (7.61 Kilowatts)
Lubrication
Full Pressure Lubrication
Yes
Oil Capacity
4 u s
-
q
uarts
(
3
-
8
'•*>
Fuel System
Carburetor (Combination Gas-Gasoline) Downdraft
Choke Electric
Fuel Tank Capacity (where used) 5 U.S. gallons (18.9 lit)
Governor (with vacuum booster) Enclosed, mechanical flyball
Governor Regulation
5
percent
Ignition 12-volt, battery
Starting Electric
Battery Recommended
SAE Group 60
12 Volt
360 Cold Cranking Amps (74 A/Hr)
Generator
Basic Design Revolving armature, 4-pole
Rating (in watts)
5000 Watt
s
Battery Charge Rate (Fixed Two Step)
2
Amp & 5 Amp
Frequency Regulation (no
load,
to full load) 5 percent
TUNE-UP
SPECIFICATIONS
Breaker Point Gap (full separation) 0.020 in. (0.51 mm)
Spark Plug Gap
Gasoline 0.025 in. (0.64 mm)
Gaseous 0.018 in. (0.46 mm)
Ignition Timing 19° BTC
Carburetor Float Clearance (between float bowl gasket and float) 1/4 in. (6.35 mm)
Valve Tappet Clearance (engine cold)
|
ntake
0.006 to 0.008 in. (0.15 to 0.20 mm)
Exhaust
0.015 to 0.017 in. (0.38 to 0.43 mm)
TORQUE
SPECIFICATIONS*
Cylinder Head Bolts
2
9-31 ft-lb (39.4 to 42.2 N«m)
Manifold Screws : ""take 15-20 ft-lb (20.4 to 27.2 N»m)
Exhaust 14-17 ft-lb (19.0 to 23 N»m)
* Torque when engine is
cold.
Be careful not to strip threads.
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