Miller Bobcat 250 Owner's Manual page 51

Trouble
Erratic power output at AC
receptacles.
C. Engine Troubleshooting
Trouble
Engine will not crank.
Engine will not start.
Engine starts but stops when Engine
Control switch returns to Run position.
Engine stopped during normal
operation.
Battery discharges between uses.
Engine idles but does not come up to
weld speed.
Unstable or sluggish engine speeds.
Engine does not return to idle speed.
During operation in near freezing tem-
peratures, engine starts and goes to
idle but stalls after a few minutes.
During operation in severe cold weath-
er, engine starts and goes to idle but
stalls after a few minutes.
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Complete Parts List is available at www.MillerWelds.com
Check fuel level.
Check engine speed, and adjust if necessary (see Section 8-7 or 8-8).
Check receptacle wiring and connections.
Have Factory Authorized Service Agent check brushes and slip rings.
Check fuse F6, and replace if open (see Section 8-5).
Check battery voltage.
Check battery connections and tighten if necessary.
Check plug PLG4 and plug PLG8 connections.
Have Factory Authorized Service Agent check Engine Control switch S2.
Check fuel level.
Check battery voltage.
Check battery connections and tighten if necessary.
Check oil level (see Section 5-4).
Check low oil pressure shutdown switch.
Have Factory Authorized Service Agent check fuel shutoff solenoid FS1 (carbureted engine only).
Check oil level.
Check and refill crankcase with proper viscosity oil for operating temperature, if necessary.
Check low oil pressure shutdown switch.
Check fuel level.
Replace fuel filter(s) (see Section 8-6).
Check oil level (see Section 5-4).
Check low oil pressure shutdown switch.
Periodically recharge battery (approximately every 3 months).
Replace battery.
Check voltage regulator and connections according to engine manual.
Have Factory Authorized Service Agent check fuel shutoff solenoid FS1 (carbureted engine only).
Clean battery, terminals, and posts with baking soda and water solution; rinse with clear water.
Periodically recharge battery (approximately every 3 months).
Replace battery.
Check voltage regulator and connections according to engine manual.
Have Factory Authorized Service Agent check fuel gauge/hourmeter/idle control, and current trans-
former CT1.
Readjust throttle linkage if necessary. Check throttle solenoid TS1 for smooth operation.
Check oil level. Oil level should not exceed Full mark on dipstick. Fuel pump will operate erratically if
crankcase is overfilled.
Tune-up engine according to engine manual.
Remove weld and generator power loads.
Check throttle linkage for smooth, non-binding operation.
Have Factory Authorized Service Agent check idle module, current transformer CT1, Engine Control
switch S2, and throttle solenoid TS1.
Treat fuel with isopropyl alcohol de-icer product.
Place Engine Control switch in the Run position until unit has been in operation and loaded for a peri-
od of time.
Install engine manufacturer's kit for cold-weather operation.
Remedy
Remedy
OM-249336 Page 47