Mantis 7921 Manuel De L'utilisateur page 17

WARNING • DANGER
!
REMOVE TINES BEFORE STARTING ENGINE AND
MAKING ADJUSTMENTS
WHAT TO DO IF YOUR ENGINE
IDLES TOO HIGH
What if your engine runs too fast ... or if the
tines turn the instant you start the Tiller?
You may need to adjust the idle screw right
below the H and L screws. Gently turn
it counter-clockwise. You'll know you've
adjusted it correctly when the axles do not
turn at low idle.
WHAT TO DO IF YOUR ENGINE
RUNS "ROUGH" CARBURATOR
ADJUSTMENT
If your engine runs "rough" or stalls, you
may need to adjust the carburetor and idle
screws.
If you remove the air-cleaner cover, you'll
see the two carburetor, adjustment screws
HIGH ALTITUDE OPERATION
This engine has been factory adjusted to
maintain satisfactory starting, emission, and
durability performance up to 1,100 feet (96,0
kPa and above) mean sea level (MSL). To
maintain proper engine operation above
1,100 feet (96,0 kPa and above) MSL the
carburetor may need to be adjusted by an
authorized ECHO service dealer.
IMPORTANT
If the engine is adjusted for operation above
1,100 feet MSL, the carburetor must be re-
adjusted when operating the engine below
1,100 feet MSL, otherwise severe engine
damage can result.
EXHAUST PORT/MUFFLER CLEANING
Tools required: 4mm Hex wrench, Wood or
plastic scraper
CLEANING THE MUFFLER SCREEN
1. Take out the spark plug.
2. Remove the red cylinder cover,
(#D1) which is held on by 2 phillips-
head screws, (#D2) and 1 hex-head
screw, (#D3) which you will need an
allen wrench to remove.
3. You will see the metal exhaust
guide, held on by 3 more phillips-head
screws. (#C1) Remove the exhaust
guide.
!
Picture 1
next to the choke button. (Picture 1)
The "RED" screw is the HIGH-speed
adjustment...The "WHITE" screw is the low
speed adjustment.
First, remove the tines from the axle. Then
start engine. Let it run for two to three
minutes. "FLASH" the choke several times
during the warm-up by closing and opening
it while engine runs in order to clear any air
from the Fuel system.
Parts Required: As needed: Heat Shield
1. Remove spark plug lead from spark plug,
and remove engine cover (2 screws).
2. Place piston at top dead center. Remove
muffler (A) and heat shield (B).
3. Use a wood or plastic scraping tool to
clean deposits from cylinder exhaust port.
IMPORTANT
Never use a metal tool to scrape carbon from
the exhaust port. Do not scratch the cylinder
or piston when cleaning the exhaust port.
Do not allow carbon particles to enter the
cylinder.
4. Inspect heat shield, and replace if
damaged.
5. Install heat shield and muffler.
4. Behind the exhaust guide (#C2) will
be the muffler gasket (#C3) and muffler
screen (#C4). The screen sits under
the gasket.
5. If the screen (#C4) is clogged with
deposits, it needs to be cleaned.
Use carburetor cleaner, and any brush
that is not metal. Brush the screen until
you are able to see through it.
6. If the screen remains plugged
after attempts at cleaning, it must be
replaced.
Contact us at www.mantis.com
2-Cycle Tiller Maintenance
Then stop the engine after it reaches
operating temperature.
Now, turn the RED, high-speed screw
counter-clockwise all the way to stop...
Then turn the WHITE, low speed screw
halfway between the counter-clockwise and
clockwise stop positions.
Now restart the engine to finish the
carburetor adjustment.
Run the engine at full speed two or three
seconds to clear out any excess fuel. Then
return to idle.
Now, accelerate the engine to full throttle
several times to check for a smooth
transition from idle to high speed.
If the engine hesitates turn the WHITE, low-
speed screw counter-clockwise one-eighth
of a turn. Then accelerate the engine.
Repeat the adjustment until you get a
smooth transition to high speed.
6. Tighten muffler mounting bolts (or nuts) to
80-95 in•lbf (90-110 kgf•cm).
7. Start engine, and warm to operating
temperature.
8. Stop engine, and re-tighten mounting bolts
(or nuts) to specifications.
9. Install engine cover and attach spark plug
Table of Contents
SV-5C/2 Engine
lead.
C3
C4
C8
C9
WARNING • DANGER
!
DO NOT USE GASOLINE OR OTHER
99922200869
FLAMMABLE SUBSTANCE
Part Number Index
Engine Cover, Fancase, Starter
C1 D1
C2
D3
C5
C6
D2
C7
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- 8 - REVISED 10/16/13
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