-５０-
8.
Carburetor
8-4 Adjustment
1) Limiter Cap Removal
Insert the threaded portion of the limiter cap tool
(special tool) into the hole of the throttle valve
and screw it counterclockwise while pressing it
against the limiter cap. Remove the L-needle
side limiter cap from the throttle valve by pulling
the limiter cap tool. Remove the H-needle side
limiter cap in the same way as the L-needle side
limiter cap.
NOTE:
If it is difficult to screw in the limiter cap tool,
firmly press the tool while screwing. When
threads are completely meshed, pull it out in
one stroke. If cap is damaged and stays in
the hole, use a pick type tool to remove it.
2
）
Initial Start Settings
①
Turn the Idle adjustnment screw
counterclockwise (CCW) until its tip just
touches throttle valve stop, then turn it
clockwisely (CW) to the position where the
engine speed gets slightly higher.
②
Turn the L-needle counterclockwise (CCW)
completely out until a “
clicking sound
” is
heard.
③
Then turn the L-needlein clockwise (CW) at
Basic Adjustment Turns.
NOTE:
Do not tighten the L-needle more than the
Basic Adjustment Turns. Tightening too
much may damage the needle spring and
L-needle.
Models
Basic Adjustment Turns
WYA-236A (EBZ7500)
14
WYA-237A (EBZ8500)
14- 1/2
④
Turn the H-needle clockwise (CW) until very
gently seated.
⑤
Then turn the H-needle counterclockwise at
(CCW) Basic Adjustment Turns.
Model
Basic Adjustment Turns
WYA-236A (EBZ7500)
1- 3/4±1/2
WYA -237A (EBZ8500)
2- 1/4±1/2
④
⑤
H-needle
②
Driver
(Tip width: 2 mm)
③
L-needle
Idle Adjustment Screw
①
Limiter Cap Tool
(M2 left-threading)
L-needle
Limiter Cap
Driver
(Tip width: 2 mm)
