Maintenance Schedule; Troubleshooting Procedures - Dolmar PB-250 Manual De Instrucciones

Maintenance schedule

General
After each refuelling
Daily
Weekly
Quarterly
Storing
Storage
– When keeping the machine in storage for a long time, drain fuel from the fuel tank and carburetor, as follows: Drain all fuel from the fuel tank. Give
a gentle push on the primer pump repeatedly until all fuel is expelled out of the primer pump. Dispose of properly and in accordance with all local
laws.
– Remove the spark plugs and add a few drops of oil into spark plug hole. Then, pull the starter gently. Confirm that oil film covers the engine inside
and tighten the spark plugs.
– Clear dirt or dust from outside of engine, wipe them with an oil-immersed cloth and keep the machine locked in a dry, well ventilated location.
– Do not store in a closed area where fuel vapors can reach an open flame from hot water heaters, furnaces etc.

Troubleshooting procedures

Problem
Engine not starting or Ignition system
starts with difficulty
Fuel supply
Compression
Mechanical fault
Warm start problems
Engine starts but dies Fuel supply
immediately
Insufficient performance Several systems
may simultane-
ously be affected
Engine assembly,
screws and nuts
Throttle lever
I-O switch
Sponge element (air filter)
Cooling air duct
Idling speed
Spark plug
Muffler
Suction head (gas ling filter)
Fuel tank
Fuel tank
Carburetor
System Observation
Ignition spark is present
No ignition spark
Fuel tank filled
No compression when
pulled over
Starter not engaging
Tank filled
Ignition spark existing
Tank filled
Engine idling
Visual inspection for damage and tightness
Check for general condition and security
Functional check
Functional check
To be cleaned
To be cleaned
Inspection
Inspection, replace if necessary
Check and it necessary clean the opening
To be replaced
To be cleaned
Empty fuel tank
Operate until engine runs out of fuel
Faulty fuel supply or compression system, mechanical defect
STOP switch operated, wiring fault or short circuit, spark plug or con-
nector defective, ignition module faulty
Incorrect choke position, carburetor defective, suction head (gas line
filter) dirty, fuel supply line bent or interrupted
Cylinder bottom gasket defective, crankshaft seals damaged, cylinder or
piston rings defective or improper sealing of spark plug
Broken starter spring, broken parts inside of the engine
Choke in incorrect position
Carburetor contaminated, have it cleaned
Incorrect idling adjustment, carburetor contaminated
Fuel tank cap defective, fuel supply line interrupted, cable or STOP
switch faulty
Air filter contaminated, carburetor contaminated, muffler clogged, ex-
haust duct in the cylinder clogged
15
Possible causes