20
STRATO CHARGED ENGINE
GZ25N
7. CARBURETOR
7-4 Composition and Inspection
a) Adjusting Idle Speed
The idle speed is set for 3000rpm at the factory. If it
is necessary to adjust the idle speed, use the adjust-
ment screw on the top side of carburetor
(Main Jet No. : #38.5)
b) Judgement of the main check valve
As illustrated, hold a plastic pipe on the check valve
and blow and suck air by your mouth. If the air is
stopped by blowing, and open by sucking, the valve
has no failure.
In case of failure, soak the valve into gasoline for
about 10 minutes and repeat blowing and sucking
several times. If this is not successful, exchange
with new one.
(Make sure to check the valve in case fuel is not
supplied though the priming pump is operated)
Screw
Bracket
Washer
Throttle Valve
Carburetor Body
O-ring
Main Jet(
♯
38.5)
Pump Diaphragm
Screen
Body
Valve
Pin
Screw
Diaphragm
Purge body
Priming Pump
Pump Cove
Screw
Gasket
Lever
Spring
Gasket
O-ring
Clip
Swivel
Adjust Nut
Adjust Screw
Adjustment Screw
Adjustment
Screw
Plastic Pipe
Main Check Valve