Service Manual

CARBURETOR
The OHV engine is equipped with a Mikuni BV
18-1 3 float bowl type Carburetor. The standard
main jet is a number 82.5. This number is
stamped in the base of the jet. The only
adjustment on the carburetor is the pilot system
pilot screw. The pilot screw should be set one
turn open. See. Fig. 2-1
1. This will have the
most effect at idle or low speed with no load on
the engine.
PlLO
PILOT
SCREW
ONE TURN OPEN
Figure 2-1 1
The carburetor on theVMF5 model uses a brass
fuel inlet seat (not replaceable) and an inlet
needle with a Viton tip. The needle is replace-
able. The carburetor on the
VMG6 model uses a
Viton fuel inlet seat (not replaceable) and an
inlet needle with a
stainless steel tip. The needle
is replaceable.
The carburetor is also fitted with a bowl drain
screw that can be used to drain fuel out of the
bowl after the tank is drained. See Fig. 2-12.
Open the screw and drain the fuel into a
suitable container.
Figure 2-12
STORAGE
To insure long engine life and easy engine
starting, it is important to follow these storage
procedures at the end
of each season:
1. Drain gasoline from the tank. Refer to Fuel
System
on page 8.
2. Drain gasoline from the carburetor bowl.
Refer
to Carburetor Maintenance above.
3. Drain the engine oil; refer to Changing Oil
on page 7.
4. Remove the spark plug and pour 2 table-
spoons of
SAE 30 or 1OW-30 oil into the
cylinder. Pull the starter rope slowly to coat
the inside
of the cylinder. Install the spark
plug and tighten it to 2.0 kg-m (15 ft-lbs).
5. Service the air cleaner; refer to Air Cleaner
Maintenance on page
6.
6. Clean dirt from all areas of the engine.
7. Tighten all nuts, bolts and screws.
8. Refill the crankcase with oil; refer to
Changing Oil on page
7.
9