Hypro HY160, Operation Manual

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14
SEDIMENT CUP CLEANING
1. Move the fuel valve to the OFF position, and
then remove the fuel sediment cup and O-ring.
Gasoline is highly flammable and explosive. You
can be burned or seriously injured when han-
dling fuel.
• Keep heat, sparks and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
2. Wash the sediment cup and O-ring in nonflam-
mable solvent, and dry them thoroughly.
3. Place the O-ring in the fuel valve, and install the
sediment cup. Tighten the sediment cup securely.
4. Move the fuel valve to the ON position, and
check for leaks. Replace the O-ring if there is any
leakage.
SPARK PLUG SERVICE
Recommended spark plugs: F7RTC or other equiv-
alents.
An incorrect spark plug can cause engine
damage.
1. Disconnect the spark plug cap, and remove any
dirt from around the spark plug area.
2. Remove the spark plug with a spark plug
wrench.
3. Inspect the spark plug. Replace it if the elec-
trodes are worn, or if the insulator is cracked or
chipped.
4. Measure the spark plug electrode gap with a
suitable gauge.
The gap should be 0.028 -0.031 in (0.70 - 0.80
mm). Correct the gap, if necessary, by carefully
bending the side electrode.
5. By hand, install the spark plug carefully to avoid
cross-threading.
6. After the spark plug seats, tighten with a spark
plug wrench to compress the washer.
If reinstalling the used spark plug, tighten 1/8 -
1/4 turn after the spark plug seats.
If installing a new spark plug, tighten 1/2 turn after
the spark plug seats.
A loose spark plug can overheat and damage
the engine. Over tightening the spark plug can
damage the threads in the cylinder head.
7. Attach the spark plug cap.
IDLE SPEED ADJUSTMENT
1. Start the engine outdoors, and allow it to warm
up to operating temperature.
2. Move the throttle lever to its slowest position.
3. Turn the throttle stop screw to obtain the stan-
dard idle speed.
Standard idle speed: 1,400±150 rpm
Maintenance