Troubleshooting WM 130/170/270 Repair
wc_tx000386gb.fm 108
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 problems 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