Trouble Shooting - Strong SP-80A Operation Manual

SYMPTOM
Travel Speed too low,
and vibration is weak
SYMPTOM
Difficult to start,‖ Fuel is
available, but no SPARK at
spark plug‖.
Difficult to start,‖ Fuel is
available, but no SPARK at
spark plug‖.
Difficult to start,‖ Fuel is
available, spark is present and
compression is normal
Difficult to start,‖ Fuel is
available, spark is present and
compression is low.
NO fuel present at carburetor
―Weak in power‖ compression
is proper and does not misfires
―Weak in power‖ compression
is proper but misfires
Engine overheats
Rotational speed fluctuates,
Recoil starter malfunction

TROUBLE SHOOTING

POSSILBE CAUSES
Engine speed too low?
Clutch slips?
V-belt slips?
Excessive oil in vibration?
Malfunction in vibrator housing?
Bearing Failure?
Insufficient engine output?
ENGINE TROUBLE SHOOTING
POSSIBLE CAUSES
Spark plugs bridging?
Carbon deposit on spark plug?
Short circuit due to deficient spark plug
insulation?
Improper spark plug gap?
ON/OFF switch is shorted?
Ignition coil detective?
Improper spark gap, point's dirty?
Condenser insulation worn of short circuiting?
Spark plug wire broken or short circuiting?
Wrong fuel type?
Water or dust in fuel system?
Air cleaner dirty?
Suction/exhaust valve stuck or protruded?
Piston ring and/or cylinder worn?
Cylinder head and /or spark plug not tightened
properly?
Fuel not available in fuel tank?
Fuel cock does not open properly?
Fuel filter clogged?
Fuel tank cap breather hole clogged?
Air in fuel line?
Air cleaner not clean?
Improper level in carburetor?
Defective Spark plug?
Water in fuel system?
Dirty spark plug?
Ignition coil defective?
Spark plug heat value improper?
Correct type of fuel?
Cooling fins dirty?
Governor adjusted correctly?
Governor spring defective?
Fuel flow restricted?
Recoil mechanism clogged with dust and dirt?
Spiral spring loose?
SOLUTION
Set engine speed to correct RPM.
Check or replace clutch
Adjust or replace V-belt
Drain excess oil and fill to proper level
Check eccentric, gears and counter weights
Replace Bearing
Check engine, compression etc.
SOLUTION
Check gap, insulation or replace spark
plug.
Clean or replace spark plug
Check spark plug insulation, replace if
worn
Set to proper gap
Check switch wiring, replace switch
Replace ignition coil.
Set correct spark gap and clean points.
Replace condenser.
Replace defective spark plug wiring
Flush fuel system, and replace with
correct type of fuel.
Flush fuel system.
Clean or replace air cleaner.
Re-seat valves
Replace piston rings and or piston
Torque cylinder head bolts and spark
plug
Fill with correct type of fuel
Apply lubricant to loosen fuel cock level,
replace if necessary
Replace fuel filter
Clean or replace fuel tank cap
Bleed fuel line
Clean or replace air cleaner
Check
carburetor
Clean or replace spark plug
Flush fuel system, and replace with
correct type of fuel
Clean or replace spark plug
Replace ignition coil,
Replace with correct type of spark plug
Replace with correct type of fuel
Clean cooling fins
Adjust governor.
Replace governor spring.
Check entire fuel system for leaks or
clogs
Clean recoil assembly with soap and
water.
Replace spiral spring
7
float adjustment, re-build