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19
CARBURETOR
Preliminary Check
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.
Ignition system - ensure that all components are
adjusted to specs and are the correct components.
2.
Fuel tank filter - must not be plugged.
3.
Fuel cap vent - hole must not be plugged.
4.
Air filter - must be clean and oiled (DuraForce
engines).
5.
Crankcase seal - Crankcase seals must be
installed properly and in good condition; torque
value on the bolts must be correct.
6.
Carburetor flange gaskets and heat shield - must
be installed correctly.
7.
Exhaust ports - must not be restricted.
8.
Fuel - mixture must be fresh. As gasoline ages, it
becomes more difficult to ignite.
9.
Governor air vane - must move freely.
Removal of DuraForce Carburetor
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.
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.
3.
Open and remove air cleaner cover and air filter
element (mower only). (See Figure 17.)
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.)
Figure 17
0893-045
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
Decarbon exhaust port and muffler
Rings leaking
Break in new engine or repair worn rings/cylinder
Float height incorrect
Re-set float
Reeds not sealing
Repair/replace reeds (DuraForce only)
Mounting Screws
Heat Shield
Содержание DuraForce
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