SPEC
IF
ICAT
IO
NS
SPECIFICATIONS
Dimension in Inches
MANUAL STARTING ELECTRIC STARTING
JB JC JB JC
I
Height
Width
Length
Weight
Number of Cylinders
Displacement (cu. in.)
26-3/8 28-5/16
17-7/8
1
9-1 /2
24-518 37-1/2
220 375
2. 4
60 120
26
I
26
18
-
25
20
37
220
I
375
60
3-1/4
~ ~~
120
3-1 14
3-5/8
I
3-5/8
Bore
Stroke
H.P.
@
2700 rpm
21.6
I
42.5
~~
3-1 /4 3-1/4
3-5/8 3-5/8
21.6 42.5
I
Compression Ratio
(Natural
Gas
Only
9:1
-
Spec
U
&
W)
I
6.5:l
I
6.5:l
I
631
I
6.5:l
Connecting Rod Bearings Tri-metal, Replaceable
Main Bearings are Steel-backed, Bronze Sleeve Type;
Replaceable Precision Inserts
STD STD
2 3
STD
I
STD
Battery ignition
**Breaker Points and Coil
*'Distributor and Coil
Magneto
*'Flywheel Type
2 13
ff
NA NA
NA NA
STD NA
Gear Driven
Battery Voltage
Combustion Air (CFM)
@
2700 rpm
STD
I
NA
NA STD
NA STD NA NA
12 12
12 12
48
96
48 96
NA
I
NA
Inlet Vent
(sq.
ft.)
*Outlet Vent
(sq.
in.)
Air Cleaner
~ ~~
7
12
7 12
80 160
80
160
DRY DRY
DRY DRY
I
1'Coolinn Air (CFM)
@
2700 rDm
I
850
I
1250
I
850
I
1250
Fuel Pump Lift (feet)
Oil Filter (Full Flow)
~~~~~~~ ~ ~~ ~ ~~
6 6 6 6
STD STD
STD STD
I
Choke
I
Manual
I
Manual
I
Manual
I
Manual
Power Take-Off
Shaft Length (inches)
Shaft Diameter (inches)
4
4 4
4
1-314
1
-3/4
1
-3/4
1
-3/4
I
"*Oil CaDacitv. Refill
IUS
Quarts)
I
3
I
6
I
3
I
6
I<eyway Width
I
Keyway Depth
3/8 3/8 3/8 318
3/16 3/16 3/16 3/16
I
Kevwav Lenath
I
3
I
3
I
3
I
3
-
Area when duct is used; without duct, make vent as large as possible.
**
-
NA means not available.
Plus an additional 1/2 quart when replacing oil filter.
t
-
For Vacu-Flo cooling: JB-610 CFM
@
1800 RPM. JC-1600
@
1800 RPM
ttt
-
2
Redistribution or publication of this document,
by any means, is strictly prohibited.
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