Generac 86640 - Manual (Page 72)

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Pressure Reducer Valve
The pressure reducer valve used in the Model 9251 LP
gas conversion kit is an IMPCO Model IMP-52. LP gas, in
vapor form, is delivered to the valve inlet at approximately 11
inches (water column). Valve inlet pressure should not ex­
ceed 14 inches (water column). The pressure reducer valve
provides a regulated pressure decrease down to approxi­
mately minus 1 inch (water column) and delivers this reduced
(vacuum) pressure to the carburetor.
The pressure reducer valve is designed for both natural
nd LP gas fuel systems. For LP gas vapor withdrawal
applications, it must be modified as follows (Figure 12):
1. Remove END CAP.
2. Remove ITEMS B and A.
3. Install and tighten END CAP.
4. Install the valve In the position
shown (spring neck down).
Carburetor Assembly
The Models 9052 liquid withdrawal system and the Model
9251 vapor withdrawal system both utilize an IMPCO CA50-
506 carburetor. Refer to ’CARBURETOR ASSEMBLY’ on
Pages 6.2-1, 6.2-2 and 6.2-3.
Page 6.3-2