19
CARBURETOR
Preliminary Check
The primer start carburetor used in E En
ines has an
all Minlon housin
with a fixed hi
h speed and pilot jet
and an adjustable float.
Perform the followin
preliminary checks to eliminate
some of the possibilities that may contribute to
carburetor malfunction:
1. I
nition system - ensure that all components are
adjusted to specs and are the correct components.
2. Fuel tank filter - must not be plu
ed.
3. Fuel cap vent - hole must not be plu
ed.
4. Air filter - must be clean and oiled (DuraForce
en
ines).
5. Crankcase seal - Crankcase seals must be
installed properly and in
ood condition; torque
value on the bolts must be correct.
6. Carburetor flan
e
askets and heat shield - must
be installed correctly.
7. Exhaust ports - must not be restricted.
8. Fuel - mixture must be fresh. As
asoline a
es, it
becomes more difficult to i
nite.
9. Governor air vane - must move freely.
Removal of DuraForce Carburetor
1. Disconnect spark plu
wire. We stron
ly
recommend cleanin
the exterior of the carburetor
before removal from the machine. This reduces
the chance that dirt can
et into the carburetor and
will extend the life of the solvent in your cleanin
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 Fi
ure 17.)
4. Detach carburetor from en
ine by removin
two
mountin
screws. Discard the two smaller
carburetor
askets on either side of the carburetor
shield. Keep the heat shield for later installation.
(See Fi
ure 17.)
Fi
ure 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
En
ine RPM out of proper ran
e Adjust to proper ran
e (experimentation within the
RPM ran
e may be necessary)
Exhaust partially plu
ed Decarbon exhaust port and muffler
Rin
s leakin
Break in new en
ine or repair worn rin
s/cylinder
Float hei
ht incorrect Re-set float
Reeds not sealin
Repair/replace reeds (DuraForce only)
Mountin
Screws
Heat Shield
To Next Page
Loading...
