Disassembly
-
Down Draft Carburetor
Several different types of down draft carburetors are in use on K662 engines.
The most common
are the Zenith Model 28 (Kohler 270374) and Model 228 (Kohler 270864) carburetors.
The main dif
-
ference between these two models is that the idle fuel adjusting screw is on the air intake (choke) seg
-
ment of the Model 28, while this same adjusting screw is located in the throttle segment of the Model
228. The 228 uses a two hole idle system which calls for the lower position of the idle needle.
The
same general reconditioning procedure can be followed for both carburetor models.
Use
service
repair kit when reconditioning.
After carburetor is disconnected and removed from engine, disassem
-
ble as follows:
1.
Remove capscrews holding air intake assembly to fuel bowl assembly.
Lift air intake
assembly off
-
-
use care to avoid bending float as assembly is removed.
Remove and dis
-
card gasket.
2.
Remove capscrews and separate fuel bowl assembly from throttle assembly.
Service each assembl
y
separately per the following instructions:
Air Intake Assembly:
1.
Remove float pin and float.
Inspect float
--
discard if dented, cracked or leaking.
2.
Remove and discard fuel valve, seat and gasket.
(Always replace these parts.)
3.
Remove and inspect idle fuel needle
--
replace if nicked or if ridges are present.
4.
Remove and clean filter head.
5.
Do not remove choke plate or shaft
-
-
if worn or damaged, replace air intake assembly.
6.
If automatic choke is used, partially disassemble this unit to allow cleaning along with
air intake assembly.
(see
Choke instructions for procedure.
)
7.
Thoroughly clean
assembly then reverse ~rocedure and reassemble
-
-
use new gaskets, fuel
valve, etc. Fuel float level should be adjusted just prior to reassembly of carburetor sub
-
assemblies.
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