CARBURETOR
Fuel Leaks From Carburetor (Leaking starts after running, stops after shutdown)
Note: This condition which does NOT drain the fuel tank is called “spit-back”.
Possible Causes
Remedies
Engine RPM out of proper range
Adjust to proper range (experimentation within the
RPM range may be necessary)
Exhaust partially plugged
Rings leaking
Decarbon exhaust port and muffler
Break in new engine or repair worn rings/cylinder
Re-set float
Float height incorrect
Reeds not sealing
Repair/replace reeds (DuraForce only)
Preliminary Check
Removal of DuraForce Carburetor
The primer start carburetor used in E Engines has an
all Minlon housing with a fixed high speed and pilot jet
and an adjustable float.
Perform the following preliminary checks to eliminate
some of the possibilities that may contribute to
carburetor malfunction:
1. Disconnect spark plug wire. We strongly
recommend cleaning the exterior of the carburetor
before removal from the machine. This reduces
the chance that dirt can get into the carburetor and
will extend the life of the solvent in your cleaning
tank.
1.
Ignition system - ensure that all components are
adjusted to specs and are the correct components.
2. Remove fuel line and drain; remove the fuel tank.
On snowthrowers, it will be necessary to remove
the lower shroud to access the carburetor and fuel
line.
2.
3.
4.
Fuel tank filter - must not be plugged.
Fuel cap vent - hole must not be plugged.
3. Open and remove air cleaner cover and air filter
element (mower only). (See Figure 17.)
Air filter - must be clean and oiled (DuraForce
engines).
4. Detach carburetor from engine by removing two
mounting screws. Discard the two smaller
carburetor gaskets on either side of the carburetor
shield. Keep the heat shield for later installation.
(See Figure 17.)
5.
6.
Crankcase seal - Crankcase seals must be
installed properly and in good condition; torque
value on the bolts must be correct.
Carburetor flange gaskets and heat shield - must
be installed correctly.
Heat Shield
7.
8.
Exhaust ports - must not be restricted.
Fuel - mixture must be fresh. As gasoline ages, it
becomes more difficult to ignite.
9.
Governor air vane - must move freely.
Mounting Screws
Figure 17
0893-045
19
| Categories | Lawn Mower Manual, Lawn-Boy Lawn Mower Manuals, Toro Lawn Mower Manual |
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| Language | English |
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