*Air cooling:
Large capacity, curved vane blower casting, integrated
with flywheel. Air passes through deep fins to maintain
optimum correct operating temperature of engine.
-
"Ignition:
Magneto with waterproof molded ignition coil and
dustproof breaker point enclosure.
Breaker system standard. (Electronic ignition system
available as optional specification.)
*Lubrication:
Splash type.
"Carburetor:
Pulse pump type, with idle mixture adjustment.
*Air cleaner:
Semi-dry type, washable polyurethane element with
nylon brush.
*Fuel tank:
Sheet metal.
*Governor:
Mechanical fly-weight type, running in crankcase oil.
*Governor control:
Adjustable speed control. Remote speed control joint
optional.
"Cylinder and crank case:
One piece hypereutectic aluminum-silicon alloy die-
casting with plateau honing.
*Piston:
Hard-chrome plated aluminum alloy.
*Piston rings:
Two compression rings including silicon carbide (on an
iron base) plated top ring. One oil control ring.
*Connecting rod:
I-beam cross section, heat treated aluminum alloy,
with large bearings.
"Crankshaft:
Heat treated ductile iron integrated with counter-
balance weights and camshaft drive gear. Induction
hardened crankpin, main journals and output shaft.
*Main bearings:
P.T.O. side, ball bearing. Magneto side, lead bronze
sintered alloy plain bearing with steel back metal.
*Valves:
Forged 21-4N austenitic stainless steel exhaust valve.
Forged heat-resisting steel intake valve.
"Valve seats:
Exhaust; Sintered alloy insert (Co-W-Ni-Cr-Mo) on an
iron base.
Intake;
Sintered alloy insert (Cu-Mo) on an iron
base.
*Valve guides:
Exhaust; Sintered alloy insert (Cu-P-Sn) on an iron
base.
Intake;
Directly borne by cylinder/crankcase. Die-
-
casted hypereutectic aluminum-silicon alloy,
machined.
*Valve tappets:
Wear resisting stamp-forged steel, hardened and
ground.
"Breather:
Vacuum type, vented through air cleaner to prevent oil
spill.
"Muffler:
Sheet metal painted with heat-resisting paint, effective
noise suppression. (Optional parts available.)
*Starter:
Recoil starter with safety cover as standard. (Optional
parts available.)
*Direction of rotation:
Counterclockwise, viewed from power take-off side.
*Finish:
,Anti-rust, painted.
Bore and stroke
Piston displacement
1
Maximum Torque 1.09 kgm/2600 rpm [7.88 ft-lbs/2600 rpm]
Direct Drive, Pulse Pump Carburetor
I
Direct Drive, Float Carburetor
72
x
51 mm [2.83
x
2.01 in]
207 cc
112.67 cu. in]
Compression ratio
6.4
:
1
Fuel consumption ratio
Fuel tank capacity
I
Ignition timing
I
Fixed 23" B.T.D.C.
I
Maximum output
-~
---
-
310 gr/HP, Hr [0.68 Ibs/HP, Hr]
2.7Q [2.8 Qt US]
Fuel
Oil volume: crankcase max.
Oil volume: crankcase
min.
Lubricating oil
Oil fill and drain
1
Spark plug 14 mm NGK BM
-
6A
5.2 W/4000 rpm [SAE J607a1
Regular gasoline
600 cc
[1.27 Pt US]
3 50 cc
[0.74 Pt US]
A.P.I.
Grade: SC, SD, SE class
SAE #20
-
Winter, SAE #30
-
Summer
Dual
(carb. side and opposite carb.)
Angled forward (carb. side up) 20'
Angled backward (carb. side down) 20"
Angled P.T.O. shaft (towards both) 20"
L
Permissible inclination of
engine for continuous
operation without any
lubrication
~robleni.
Idle speed set, no load
Max. speed set, no load
Dry weight (S.T.D. set up)
1600 rpm (crankshaft)
4000 rpm (crankshaft)
13 kg
[28.7 Ibs]
3
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