S&S Cycle Super E and G Series Shorty Performance Carburetors for 1936-84 Harley-Davidson Big Twins and 1957-85 Ironhead Sportster Models - Manual (Page 9)

9
1. Starting Procedure of Carb Operation
S&S Super E & G carburetors do not have a conventional
choke. Instead, a mixture enrichment/fast idle device is used
for starting and engine warm-ups. The enrichment device
utilizes separate air and fuel pickup passageways and is
engaged by pulling fast idle lever upward. See Picture 16.
Super E & G carburetors also feature a fully adjustable
accelerator pump which is actuated by quick throttle
movements at partial throttle openings and can be used as
an additional starting aid.
ENRICHMENT DEVICE NOTES:
• Enrichment/fast idle pickup tube located directly below
fast idle plunger, is pressed into carburetor body and must
not be removed. See Picture 17
Picture
17
• Plunger nut, plunger spring, and plunger, may be removed
for cleaning purposes.
• If air cleaner backplate is removed, be sure fast idle lever
and enrichment plunger are engaged properly and do not
bind when backplate is reinstalled. See Picture 12.on page
7.
• S&S® enrichment system operates on manifold vacuum. If
throttle is opened while starting engine, vacuum will be
reduced and enrichment system will not function normally.
Removal of enrichment/fast idle pickup tube from carburetor
body may cause irreversible damage to carburetor.
A- Cold Starts
1- Open fuel petcock.
NOTE: When motorcycle is not running, fuel petcock/shutoff valve
should be turned off to prevent possible leakage should needle and
seat not seal properly.
Gasoline leaking past inlet needle may flood engine causing
oil contamination and engine damage.
Gasoline leaking past inlet needle may flood engine and
surrounding area creating a potential health and fire hazard.
2- Prime engine with one or more squirts from
accelerator pump. Ambient temperatures below 60°
may require increased priming, up to 6-7 squirts
depending upon exact temperature and carb jet size.
3- Pull fast idle level, to fully raised position.
4- Turn on ignition.
NOTE: Some engines, especially those equipped with magnetos, will
start easier if given two prime kicks BEFORE ignition is turned on. For
reliable starting, magneto should be equipped with kill button to
disable ignition for prime kicks.
5- With throttle closed, kick engine through or engage
electric starter.
6- If engine fails to start immediately, crack throttle
enough to barely open butterfly and continue to kick
or engage starter until engine fires.
7- After engine starts, position lever to maintain rpm at
approximately 1000-1200 rpm with throttle closed.
Lever may gradually be pushed down to closed
position as engine warms. Engine should be warmed
sufficiently to idle with fast idle lever off in 1 to 4
minutes or after a few miles of riding.
NOTE: Operating engine with fast idle lever up for excessive time will
result in fouled spark plugs. Push lever completely down as soon as
engine will run smoothly without enrichener.
B- Hot Starts
1- Open fuel petcock.
2- Turn on ignition.
3- With throttle closed, kick engine through or engage
electric starter.
4- If engine fails to start immediately, open throttle
slightly and continue to kick or engage starter until
engine fires.
C- Troubleshooting Tips - engine will not start:
1- Fuel supply exhausted.
2- Weak or no spark - discharged battery, faulty ignition
module,coil, spark plug wires, or magneto worn
points or defective condenser, ,.
3- Plug gap too wide - S&S recommends .025" to .030"
plug gap on engines with points type ignition and
stock coil. Electronic ignitions and high output coils
can run wider plug gaps. Follow ignition
manufacturer’s recommendations.
4- Improper ignition timing - Worn or poorly maintained
mechanical advance units sometime stick in
advanced position causing hard starting, kick-back
and erratic idle.
5- Tight tappet adjustment - If solid tappets are