Troubleshooting - Honda BF4A Operation And Maintenance Ma

15. TROUBLESHOOTING

<Engine fails to start>
1. Emergency stop switch
clip is not engaged.
2. Starter grip cannot be
operated.
3. Out of fuel.
4. Fuel line is flattened or
kinked.
5. Fuel connectors are not
connected properly.
(When using the portable fuel
tank.)
6. Fuel filler cap vent knob
is not turned ON.
7. Fuel system is not
primed by squeezing the
primer bulb.
(When using the portable fuel
tank.)
8. Fuel is not reaching the
carburetor.
96
Engage the emergency
stop switch clip in place.
(page 43)
Set the shift lever in
NEUTRAL position.
(page 45)
Supply fuel. (page 34,35)
Check for bent or
pinched fuel line.
Connect properly.
(pages 41,42)
Open the fuel filler cap
vent knob. (page 22,23)
Squeeze the primer bulb
to supply fuel.
(page 42)
Loosen the carburetor
drain screw to see if
there is fuel in the
carburetor float bowl.
(page 90)
9. Engine is flooded.
10. Plug cap is not installed
properly.
11. Fuel valve lever is not
turned to the appropriate
position.
<Engine speed fluctuates or engine stalls>
1. Fuel level is low.
2. Fuel line is flattened or
kinked.
(When using the portable fuel
tank.)
3. Fuel filter is clogged.
4. Spark plug is fouled.
5. Spark plug heat range is
incorrect.
6. Spark plug gap is
incorrect.
Clean and dry the spark
plug. (page 78)
Install plug cap securely.
(page 79)
Turn the fuel valve lever
to the appropriate
position. (page 15)
Add fuel. (page 34,35)
Check for excessively
bent or pinched fuel line.
Replace fuel filter.
(page 83)
Remove spark plug and
dry and clean it.
(page 78)
Replace with spark plug
of proper heat range.
(page 78)
Adjust to proper gap.
(page 78)