Wiring Diagrams; Troubleshooting - AMF SKI-DADDLER Parts And Service Manual

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SERVICE AND REPAIR
I~
During reassembly, apply 18 to 20 foot pounds
torque.
Spark plug condi tion may be determined by the color.
A carbonized plug is black; a burnt plug is pale grey,
whereas a normal functioning spark plug is brown.
{ \
certain the gas tank-to- carburetor line used on all \
J
Mark V series Ski-Daddlers is connected to the OUT
fitting on the gas tank outlet and to the inlet fitting
on the carburetor. The recirculating, carburetor-
to-tank line must be connected to the IN fitting on the
gas tank outlet (figure 12) and to the recirculating
elbow (figure 8).
SPARK PLUG CONVERSION CHART
LIGHT SERVICE SEVERE SERVICE
MODEL NO.
ENGINE
CHAMPION AC CHAMPION AC
SD18E20B Hirth 493
SD18E27A Hirth 399
SD18P27A
Hirth 399
SD18P21A Hirth 634
SD18E25B Kohler 399
SD15P10B JLO 295
*No AC conversion for light service spark plug.
When replacing spark plugs, refer to the preceding
chart to insure proper spark plug heat ranges for
your particular engine. NOTE: Replacementplugs
should be U.S. Champion, AC spark plugs or
equivalent available at your authorized Ski-Daddler
Dealer.
Wiring Diagrams
Electrical wiring diagrams are provided for the
trained techni.cians using this manual. Each diagram
is identified with the model number of the snow-
mobile to which it applies (see figures 17, 18, 19
and 20).
Troubleshooting
ENGINE HARD TO START. Fuel line blocked or
leaking; ruptured fuel-pump diagram; water in fuel,
flooded, loose impulse line; ignition or switch wiring
loose or grounded; spark plug(s) fouled or faulty;
contact breaker points pitted or burned.
ENGINE STOPS. Fuel tank empty; fuel flow ob-
structed; ignition system faulty. Spark plug(s)
fouled or dirty. Engine too hot and pistons seizing;
carburetor setting too lean or incorrect grade of oil
being used, impulse line loose.
ENGINE STOPS, FUEL TANK HALF EMPTY. Be
K-8
K-8
K-8
K-7
K-8
K-9
18
* K-7
SN82F
*
K-7
SN82F
*
K-7 SN82F
SN82F K-60R SN82F
*
K-7 SN82F
SN83F
K·8
SN82F
ENGINE OPERATES IRREGULARLY. Spark plug
loose, fouled or faulty; ignition switch wiring
grounded; carburetor out of adjustment or dirty.
Engine holddown bolts loose; ignition timing off.
ENGINE WORKING FOUR-STROKE. Choke shut;
carburetor settings' incorrect; dirt preventing car-
buretor inlet needles from seating properly.
ENGINE LOSES POWER. Poor compression due to
loose head and crankcase bolts. Faulty ignition;
timing; piston rings sticking due to the use of im-
proper oil. Carbon deposits in cylinder.
ENGINE BACKFIRES THROUGH CARBURETORS.
Carburetor fuel -supply channel clogged. Carbu-
retor set too lean.
ENGINE BACKFIRES THROUGH EXHAUST. In-
correct or faulty spark plug(s); faulty ignition coil
or condenser; loose ignition wiring.
ENGINE OVERHEATS. Insufficient or incorrect
grade oil in fuel mixture; c:;trburetor or fuel line
partly clogged; carburetor setting too lean; ignition
timing too slow.
EXCESSIVE FUEL CONSUMPTION. Carburetor
fuel line or gas tank leaking; choke closed; incor-
rect carburetor setting.
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