Section 2: Air Cleaners And Carburetion; Air Cleaner; Servicing; Foam Pre-Cleaner - Generac Power Systems GN190H Service And Repair Manual

SECTION 2: AIR CLEANERS AND CARBURETION

AIR CLEANER

SERVICING:

The engine will not run properly and may be damaged if it
is run with a dirty air cleaner.
Clean or replace the paper filter every 25 hours of opera-
tion or once annually, whichever occurs first. Clean or replace
the paper filter more often if operating in extremely dusty or
dirty conditions.
Clean or replace the foam pre-cleaner every 25 hours of
operation; more frequently under dirty or dusty conditions.

FOAM PRE-CLEANER:

To clean or replace the foam pre-cleaner:
1. Remove the air cleaner cover, then remove the foam pre-
cleaner.
2. Wash the foam pre-cleaner in soapy water.
3. Squeeze the pre-cleaner dry with a clean cloth. DO NOT
TWIST
NOTE: If the pre-cleaner is still dirty after washing and
drying it, replace it with a new filter
4. Apply enough clean engine oil to saturate the pre-cleaner.
5. Wrap the pre-cleaner in a clean dry cloth and squeeze out
excess oil DO NOT TWIST. Set the pre-cleaner aside.
Figure 2.1 — Typical Air Cleaner

PAPER FILTER:

1. Remove the air cleaner cover.
2. Remove the foam pre-cleaner and service it, if necessary.
3. Remove the paper filter.
4. Clean the paper filter by tapping gently on a flat surface.
If it is very dirty, replace it.
5. Clean the air cleaner cover. Then, install the foam pre-
cleaner into the cover.
6. Insert the paper filter into the cover so it holds the pre-
cleaner in place.
7. Assemble the pre-cleaner, paper filter and cover to the air
cleaner base.

AIR CLEANER BOX REMOVAL:

If the air cleaner box must be removed for further engine
disassembly, do the following (see Figure 2.2):
1. Remove the air cleaner cover.
2. Remove the foam pre-cleaner and paper filter.
3. Remove the choke knob (units with choke style carburetor).
4. Remove the breather hose.
5. Remove the cap screw in the upper part of the air cleaner
box and the two phillips head screws in the lower part of
the air cleaner box.
CAUTION! Removal of the two phillips head screws
on a choke style carburetor/air cleaner box com-
bination also will loosen the carburetor from its
mount. Be careful not to let the carburetor drop,
as damage to the carburetor and/or governor rod
and anti-lash spring may result.
GASKET
AIR CLEANER BOX
Figure 2.2 — Removal of Air Cleaner Box,
Primer Style Carburetor
14
BREATHER HOSE
CAP SCREW
PAPER FILTER
FOAM
PRE-CLEANER
PHILLIPS HEAD SCREWS