Wacker Neuson WM 130, Repair Manual

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Troubleshooting WM 130/170/270 Repair
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High fuel consumption
1. Fuel system 1) Clogged air cleaner Clean or replace
2) Faulty needle valve and/or
high fuel level in float chamber Clean or replace
3) Choke does not open fully Repair or replace
2. Engine core compo-
nents 1) Low compression Check and repair
2) Overcooling Check and adjust
load and/or engine
speed
Valve system problems
1. Ignition system prob-
lems 1) Loose ignition system wiring Inspect and tighten
2) Improper or faulty spark plug Clean or replace
2. Fuel system problems 1) Lean or rich fuel/air mixture Clean, adjust or
replace carburetor
2) Carburetor contamination Overhaul or clean
3) Dirty or clogged fuel lines Clean or replace
4) Air mixing from air intake sys-
tem joints Tighten; replace
gasket
3. Cylinder head 1) Carbon deposits in combus-
tion chamber Clean
2) Leakage from cylinder head
gasket Replace
4. Valve system prob-
lems 1) Improper valve clearance Adjust
2) Valve heat deterioration Replace
3) Worn or broken valve spring Replace
4) Improper valve timing Adjust
Problem and possible cause Remedy