Gas Regulator - Briggs & Stratton 1938 Operator's Manual

ra_on Service &
Troubleshooting Guide - Home Generator Systems
'_ Model 1938 (lOkW) Troubleshooting
o• If the proper fuel pressure is not present:
• Repair and/or replace fuel delivery system.
• Re-test fuel pressure as described above.
•• If fuel pressure is acceptable:
Check the Fuel Solenoid.
While the engine is cranking:
• Check for DC voltage at the fuel solenoid (Figure 20).
should be measured.
•• If no voltage is present at the fuel solenoid:
• Check for voltage at Pin #7, Wire #14 at the CMA
harness connector (Figure 21).
.... should be measured.
• • If no voltage is present:
Verify Ground connection on CMA circuit board.
(See Figure 27)
Verify that there are no other faults
BEFORE
replacing the CMA circuit board.
• Replace the CMA Circuit Board.
• • If voltage is present at the solenoid:
The fuel solenoid delivers fuel pressure to the fuel regulator.
The regulator delivers fuel to the carburetor when a
negative pressure is created by the intake stroke of the
engine pistons. If fuel and fuel flow are present without
ignition, the gas must be expelled through the exhaust pipe.
Gas Regulator
The gas regulator is an atmospheric zero governor which
acts like the float and needle valve in a gasoline carburetor.
Air flow through the venturi in the carburetor creates a
vacuum which acts through an internal outlet on the
diaphragm.
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