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EMISSIONS SERVICE BULLETIN
Ref No. 12-01R
Issued in: Jan. 2012
3. Carburetor Adjustment WITH limiter cap INSTALLED
1. Start and run engine for 3.5 minutes alternating RPM
between, Wide Open Throttle (WOT) for 1 minute and Idle
for 10 seconds.
2. Adjust idle speed throttle valve screw
(A)
to 3000 RPM +/-
200 RPM. Unit should Idle at 2800-3200 RPM. The W.O.T.
(Wide Open Throttle) should be at 7500-8500 RPM
If engine does not run correctly after idle adjustment, follow
guidelines for
“4.Carburetor Adjustment WITH limiter caps
REMOVED”.
4. Carburetor Adjustment WITH limiter cap REMOVED
Low Speed Limiter Cap Removal
1. Screw limiter cap removal tool counterclockwise (CCW) 2 turns into
Low
(B)
speed mixture needle limiter cap.
2. Pull limiter cap out from Low speed mixture needle hole.
NOTE: If cap is damaged and stays in the hole, use pick type
tool to remove.
■
Initial Start Settings, if original needle settings
were NOT disturbed
1.Turn throttle valve adjust screw
(A)
IN
clockwise (CW)
ONE
and one
half (1-1/2) turns.
2.Turn Low speed mixture needle
(B)
OUT
counterclockwise (CCW)
1/8 turns.
■
Initial Start Settings, if original settings WERE
disturbed
1. Turn throttle valve adjust screw
(A)
counterclockwise (CCW) until its
tip just touches throttle plate stop. Then turn the screw in clockwise
(CW) 7 turns.
2. Turn Low speed mixture needle
(B)
counterclockwise (CCW)
completely out until a clicking sound is heard. Then turn it in
clockwise (CW) 12-1/8 turns.
3.
START ENGINE USING WIDE OPEN THROTTLE
to prevent spark
plug fouling.
4. If engine idles and
does not
die out at idle, continue to the warm up
procedure and
“Low Speed Mixture Needle Adjustment”
on Page 3.
5. If engine
Does Not Idle and Dies Out at idle
, turn Low speed
mixture needle (B) in clockwise (CW) 1/8 turn. Again
START
ENGINE USING WIDE OPEN THROTTLE
and confirm idle
condition.
Repeat step 6 until steady idle is obtained before moving to
“Low
Speed Mixture Needle A
djustment”
procedure on Page 3.
NOTE: The initial carburetor settings for throttle valve idle speed adjust screw, Low speed
mixture, and High speed mixture needles are intended to start and run the engine before final
carburetor adjustments are made. Actual turns required for starting engine may vary slightly.
Low Speed Mixture Needle (B)
Idle Speed Throttle Valve Screw (A)
(B)
Limiter Cap
Limiter Cap Tool
Low-Speed
Needle (B)
Idle speed
throttle valve screw (A)
