Integral fuel pump, Carburetor adjustment, Integral fuel pump carburetor adjustment – Generac Power Systems TXP User Manual
Page 88
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If choke shaft and plate were remov
ed, choke plate must be reinstalled
as shown above. Tighten two choke
Make sure holes in body gasket are
properly aligned with body as shown
above. Fasten upper and lower bodies plate screw - DO NOT OVERTIGHTEN,
together with mounting screws.
Screw in needle and idle valves until they just seat. Then back off on
both valves 1% turns. These settings are approximately correct. Final
adjustment will be made with engine running.
I N T E G R A L F U E L P U M P
The integral fuel pump is operated
by
crankcase
vacuum/pressure
pulses,
See exploded view at right.
Remove three screws that attach pump to carburetor. Lift pump body off
carefully to prevent damage to diaphragm. Inspect diaphragm for punctures,
wrinkles and wear. Replace, if damaged. Make sure diaphragm mounting surf
aces are free of, nicks, burrs, debris. Inspect pulse chamber spring and
flapper valve springs for distortion or deterioration. Replace, if necess
ary. Inspect outer pulse chamber diaphragm and cover plate gasket for
cracks and punctures, When assembling fuel pump, tighten screws in a stag
gered sequence to avoid distortion of diaphragm,
C A R B U R E T O R A D J U S T M E N T
Carburetor adjustment procedures are outlined on Page 4.14, Test 23,
15.4
Issued 5-78