Maintenance Procedures (Lpg Engine) - Kärcher KMR 1250 B Service Manual

Troubleshooting Information

Maintenance Procedures (LPG engine)

1
Removing muffler guard
2
Measuring CO value inside muffler tailpipe
Setting CO value w/ mixture control screw (idle
speed)
28
Set CO value (LPG engine)
To adjust CO value, the following measuring de-
vices will be needed:
– Tachometer, P/N 6.491-361
– Exhaust analyser. Procure suitable CO an-
alyser locally; requires measuring range up
to 2% CO.
1. Set CO value at idle speed
– Start engine, and set accelerator lever on
instrument panel to MIN position. Idle speed
should be between 1250 and 1550 RPM (see
also "technical specifications").
– Let engine warm up for a few minutes.
– Using a floor jack, raise front of unit, and
remove muffler guard (1). There is no other
way to access the muffler outlet.
– Measure CO value inside muffler tailpipe (2).
– Using the mixture control screw idle speed)
(5), set CO value on gas regulator (4) (nom-
inal CO value is 0.5%).
– With the correct adjustment, engine must run
smoothly and quietly, and provide reliable
starting.
– With adjustment completed, fix mixture con-
trol screw (5) by applying sealing lacquer.
3
1 Muffler guard
2 Muffler
3 Solenoid valve
4
4 Gas regulator
5 Mixture control screw (idle speed)
5
KMR 1250 LPG