Adjustments; Adjust Lp Fuel System - Toro Workman 3000 Series Service Manual

Adjustments

Adjust LP Fuel System

1. Park machine on a level surface, stop engine, en­
2
gage parking brake, and remove key from the ignition
switch.
2. Read carefully Precautions for Working on Liquid
Propane Gas (LP) Fuel Systems before proceeding fur ­
ther.
3. Slowly open valve on propane fuel tank and close.
1
Use leak check or soap solution to check all fittings,
valves, couplers, and lines for leaks. No fuel leaks
should be present. Any detected fuel leaks must be re ­
paired before engine is started.
IMPORTANT:Use exhaust gas analyzer to monitor
CO readings.
4. Reopen tank valve and start engine. Allow engine to
reach normal operating temperature. Using idle adjust­
Figure 7
ment screw, adjust for a CO readIng of 1 to 3% at idle
1. Vaporizer–regulator 2. Idle adjustment screw
speed of 1200 rpm (Fig. 7).
5. Run engine at 3000 rpm and recheck idle CO adjust­
ment. High load mixture is not adjustable but will pro­
duce a CO readIng of 3 to 7%.
6. To prevent tampering with adjustment, install welsh
plug over idle mixture screw (Fig. 7).
Liquid Propane Conversion Kit Page 11 – 10 Rev. D
Workman 3000/4000 Series