IMPCO LPG Carburetor Mixer Model CA55M-5

IMPCO LPG Carburetor Mixer Model CA55M-5

MODEL CA55 CARBURETOR DESCRIPTION
IMPCO’s CA55 model carburetors are offered in four design variations, providing proven, effective solutions
for optimum metering and delivery of either LPG vapor or Natural Gas. The standard model can be
mounted in either an updraft, downdraft, or side draft orientation, supplying either LPG or Natural Gas to engines
up to 73 hp (1 to 54kW), with a flow rate of 118 CFM (55.7 L/s). Various SAE flanges and air horn sizes
are available.

SPECIFICATIONS
Fuel Type .......................................... LPG Vapor or Natural Gas
Inlet Pressure .................................... -1.5” w.c. (-0.37 kPa)
Operating Temperature Range ......... -40°F to +250°F (-40°C to +121°C)
Mounting Position .............................. Vertical
Diaphragm Material ........................... N/A
HP/kW Rating .................................... Up to 73 hp (54 kW) @ 118 CFM (55.7 L/s) and 2.0” in Hg manifold depression

ITEM P/N DESCRIPTION
1 S1-74 Screw, idle
2 NSS Spring, idle screw
3 NSS Plug, 1/8 NPT
4 NSS Body assy
NSS* Air valve Assy
AV1-14925-3 Air valve Assy (Rich)
6 NSS* Ring, air valve sealing
NSS Spring, air valve
S2-14681 Spring, air valve, light tension
8 NSS* Plate, ass’y
9 G1-92* Gasket, throttle body to mixer
10 NSS Piston, idle cutoff
11 NSS Spring, idle cutoff
12 NSS Screw, 10-24 x 5/8” SEMS (4)
13 S1-69 Screw, 1/4-28 x 5/16(2)
14 NSS (Refer to AT2 Throttle body charts)
15 NSS Pin, throttle stop (2)
16 NSS Screw, 6-32 x 1/4 SAE (2)
NSS Butterfly, 19.1 mm (.750”)
NSS Butterfly, 25.4mm (1.000)
18 S5-6 Throttle shaft, 6.4mm (.250) dia.
NSS Bearing, Oilite, 6.4mm (.250”) ID. (2)
NSS Bearing, Needle, .687 x .500 x .625
20 NSS Seal, 6.4mm (.250”) shaft (2)
21 NSS Ring, seal retainer (2)
22 AL1-8-1 Throttle stop ass’y: 6.4mm (.250) ID.
23 NSS Throttle stop lever
24 NSS Stop screw, 10-32 x 3/4
25 S2-15 Spring, idle stop screw
26 S1-18 Pin screw, throttle stop
27 AL1-7-1 Throttle lever w/screw
28 NSS Throttle lever
29 NSS Screw, 10-24 x 5/8”
NSS Gasket, 1/2 SAE flange
G1-16 Gasket, 3/4” SAE flange
G1-17 Gasket, 1” SAE flange
G1-18 Gasket, 1-1/4” SAE flange
G1-120 Gasket, flange