Sherpa ST-R50ES Installation and maintenance instructions

OPERATOR’S MANUAL AND PARTS LIST
PETROL LAWNMOWER - ST-R50ES
Spares & Support: 0845 123 5844
www.sherpatools.co.uk
Before use please read & understand this manual, paying particular
attention to the safety instructions.
30/03/2012 v1

Page 2
CONTENTS
SAFETY INSTRUCTIONS 3
MAJOR PARTS 4
ASSEMBLY AND OPERATION 5-6
MAINTENANCE 7
PARTS DIAGRAM AND LIST 8-9
SPECIFICATIONS 10
EC DECLARATION OF CONFORMITY 11

Page 3
SAFETY INSTRUCTIONS

the lawn mower. Learn its application and limitations as well
        
reference.
x Use sturdy footwear - do not operate when barefoot or wearing
open sandals.
x Do not put handsor feet near or under rotating parts. Keep clear
of the discharge opening at all times.
x Do NOT operate the lawn mower if you are tired, ill or under the

x Do NOT smoke when using the lawn mower and ensure caution
when handling fuel. We recommend you fuel the machine away
from where you wish to work to prevent any spilt fuel igniting
when you start the engine.
x Ensure that bystanders, children and pets keep well away
when mowing and only allow persons familiar with these
instructions to use the lawn mower.
x Inspect the lawn mower, and in particular the blade, before use for
any worn or damaged parts. Do not use until the parts are repaired
or replaced with parts approved by the manufacturer.
x Before starting the engine make sure the lawn is clear of obstacles
such as stones, branches or children’s toys.
x Always stop the engine when crossing gravel drives, walks or
roads. Stop the engine and allow the blade to stop rotating
before removing the grass bag for emptying.
x Stop the engine and disconnect the spark plug before clearing
blockages, cleaning or inspecting the mower.
x Do not operate when raining and take particular care on damp
grass which can prove slippery, particularly on slopes.
x When mowing on a slope always mow across the slope, not up
and down. Take care when changing direction. The slope should
not exceed 20 degrees.
 Clean the mower after each use and, if storing for a prolonged
period, drain down the fuel in the tank. Remove the spark plug
and put a few drops of oil into the cylinder before pulling the
starter a couple of times to distribute the oil evenly. Replace the
spark plug. If you need to tilt the mower while cleaning always tip
it backwards, towards the handles, do not tip it on its side as this
will cause oil to enter the carburettor or exhaust.

Page 4
MAJOR PARTS
Drive lever
Brake lever
Starter handle
Grass catcher
Height adjust handle
Oil dipstick
Quick fix handle
Fuel cap
Primerbutton
Air filter
Spark plug
Exhaust muffler
Push button start
Side discharge
Dash board
Motor

Page 5
ASSEMBLY AND OPERATION
The lawn mower is shipped without oil or petrol in the
engine.
The mower has been assembled and tested in the factory and
only needs a small amount of assembly.
 Remove the mower carefully from the box - it may be easier
to remove one side of the box and roll the machine out.
 Depress the Operator Presence Control Bar Unfold
handles carefully so as not to pinc the cables then raise
the lower handles. Fit the two bolts and wingnuts from the
parts bag, which will lock the lower handle into place. Raise
with the upper handle section so that it lines up with the lower
lower handle section. Tighten the wingnuts.
 Fit the dashboard using the four bolts and nuts as shown in
the diagram.
 The diagram shows the position of the three parts of the
upper handle.
 The brake lever (sometimes called the operator presence
control lever) must be pulled back towards the handle to
start the engine and during operation. If the lever is
released it will automatically stop the engine.
 The drive control lever - pull this lever up towards the han-
dle to engage the self-propelled mode. If this is not engaged
the mower can be used in ‘push’ mode.
 The engine speed has been set at the factory for optimum
performance - it is not adjustable.
Before your initial use of the mower and at the beginning
of every season, charge the battery for 5-6 hours.
 The cutting height can be adjusted by a single lever through
5 positions from 25-75mm. The medium position is best for
most lawns. Under certain conditions, such as very tall grass,
it may be necessary to cut the grass twice, once on the highest
setting and then again on medium.
Operation:
 Fill the engine with SAE30 oil to the ‘full’ mark on the
dipstick. Check the level of the oil.
 Fill the fuel tank with unleaded petrol.
 a cold startto allow fuel
into the engine.
 Pull the brake lever back to the push handle and press the
start button until the engine starts and runs.
 The machine can also be started using the pull cord (if the

and pull starter cord until resistance is felt, then pull rapidly
to start the engine.
Note: if the brake lever is released the engine will stop.
 Pull the drive control lever up towards the handle and the
lawnmower will self-propel.

Page 6
OPERATION cont’d
The mower has four different operating modes.
1. Collecting:
 Ensure that the side cover is closed.
 
the front of the box to the shaft on the mower.
  the
 When the box isfull, the grass will be visible through the viewing
window in the top of the box.
 Stop the engine before emptying the grassbox.
2. Rear Discharge:
 Ensure that the side cover is closed.
 removti-
on, the mower will cut and discharge the grass from the rear of
the machine.
3. Side Discharge:
 Fit the mulch plug to the rear discharge opening of the mower

 Lift the cover on the side of the mower and attach the side dis-
charge chute as shown in the diagram.
 The mower will now eject grass from the side discharge chute.
4. Mulching:
 Fit the mulch plug to the rear discharge opening of the mower
and close the rear flap.
 Ensure that the side cover is in the closed position (with the
discharge  removed
 The mower will now recycle the chopped grass into the lawn
surface.
 

Page 7
MAINTENANCE
Regular careful maintenance is essential for keeping the lawn-
mower in good condition.
 Before each use, ensure that all bolts, nuts and screws are
tight.
 After each use, allow the mower to cool down before clean-
ing off any grass and other debris. Use a brush or com-
pressed air and avoid getting water into the engine.
 Never store the mower with petrol in the tank within an en-
closed area where it is possible for fumes to reach an open

 When storing for a long period drain the mower of fuel after
the engine has cooled down. Do this outside to reduce any

  of useevery
season or every 50 hours of use. Dispose of waste oil at
your local recycling centre.
 Clean the spark plug regularly and change every season.
To change the blades:
 Drain the fuel tank by running the mower until the fuel tank
is empty and the engine stops.
 Allow the engine to cool and then tip on to its left hand side
(air cleaner side uppermost).
 Using gloves to protect your hands, undo the screw and re-
move the old blade and replace with a new one in the order
shown on the diagram below.
 
A damaged blade that is out of balance will cause the
mower to vibrate and may break. Check the condition of
the blade regularly.

 
elements.
 
refitted.
 If the paper element is heavily contaminated it should be
replaced using a genuine part from your local dealer.

Page 8
PARTS DIAGRAM

Page9
PARTSLIST
No. Part No. Description QTY No. Part No. Description QTY No. Part No. Description QTY
1 TH169-1 Foam Pipe 1 36 TH169-36 Left Steel Wire Spring 1 71 TH169-71 Blade Washer 1
2 TH169-2 Stop Lever 1 37 TH169-37 Spring for Self-propelled
Cable 1 72 TH169-72 510 Blade B 1
3 TH169-3 B Type Self-propelled Lever 1 38 TH169-38 Self-propelled Spring 1 73 TH169-73 Short Bush Blade
Adapter 1
4 TH169-4 B1 Type Upper Handle for
Dash Board 1 39 TH169-39 Rear Drive Shaft Assy for
Self-propelled 1 74 TH169-74 Short Bush for Blade
Adapter 1
5 TH169-5 II Type Hex Locknut M6/8.8 8 40 TH169-40 Right Steel Wire Spring 1 75 TH169-75 Long Key for Crankshaft 1
6 TH169-6 Hex Flange Face Bolt
M6x35/8.8 1 41 TH169-41 Pin 2 76 TH169-76 Small Belt Wheel 1
7 TH169-7 Rope Guide 1 42 TH169-42 Height Adjustment Handle
Ball 1 77 TH169-77 V Type Belt 1
8 TH169-8 Brake and Self-Propelled
Cable 1 43 TH169-43 Small Straight Gear
(Ratchet Wheel R) 1 78 TH169-78 Hex Flange Face Bolt
M10x25/8.8 3
9 TH169-9 Shaft for Battery Box 1 44 TH169-44 Mulching Plug 1 79 TH169-79 Catcher Assy 1
10 TH169-10 Knob 2 45 TH169-45 Cross Recess Pan Head
Tapping Screw 4 79-1 TH169-79-1 60L Plastic Bag 1
11 TH169-11 Plug for Handle 2 46 TH169-46 Rear Baffle 1 79-2 TH169-79-2 Cover for Plastic Bag 1
12 TH169-12 Knob 2 47 TH169-47 Cross Recess Pan Head
Tapping Screw 5 80 TH169-80 Combined A for Control
Cable 1
13 TH169-13 Flat Washer/8.4x16x1.6 4 48 TH169-48 B Type Belt Cover 1 81 WE102-81 Board With Logo 1
14 TH169-14 Carriage Bolt M8x50/8.8 2 49 TH169-49 Height Adjustment Pull
Rod 1 82 WE102-82 Upper Cover for Dash
Board 1
15 TH169-15 I Type Hex Nut M8/8.8 6 50 TH169-50 Coarse Thread Hex Bolt
M8×16/8.8 2 83 WE102-83 Circle Cover for Board 1
16 TH169-16 B Type Lower Handle 2 51 TH169-51 Left Side Board 1 84 TH169-84 Flick Spring for Cover 2
17 TH169-17 Fastener 1 52 TH169-52 II Type Hex Locknut
M8/8.8 4 85 TH169-85 Flick Shaft for Cover 2
18 TH169-18 Thin Knob 2 53 TH169-53 T675 Engine 1 86 TH102-86 Dash Board Pedestal 1
19 TH169-19 Carriage Bolt M8X30/8.8 2 54 TH169-54 Right Side Board 1 87 TH169-87 Hex Flange Face Bolt
M6X28/8.8 4
20 TH169-20 Fastener 1 55 TH169-55 Carriage Bolt M8X15/8.8 2 88 TH169-88 The Board of Rear
Discharge 1
21 TH169-21 Rear Discharge Cover 1 56 TH169-56 Board for Height Adjuster 1 89 TH169-89 Cross Recess Pan Head
Tapping 1
22 TH169-22 Shaft for Rear Discharge
Cover 1 57 TH169-57 Mulching Board 1 90 TH169-90 Spring for Pull Rod 1
23 TH169-23 Spring for Rear Discharge
Cover 1 58 TH169-58 Mulch Spring 1 91 TH169-91 Cross Recess Pan Head
Tapping 1
24 TH169-24 Lock Washer 2 59 TH169-59 Side Discharge Cover 1 92 TH169-92 Button Pedestal 1
25 TH169-25 Pin 4 60 TH169-60 Mulch Shaft 1 93 TH169-93 Spring for Button 1
26 WE102-26 Outside Cover for B Type
10" Wheel Hub 2 61 TH169-61 Hex Flange Face Bolt M5X10/8.8 4 94 TH169-94 Button 1
27 TH169-27 Flexible Washer 6 62 TH169-62 II Type Hex Locknut
M5/8.8 4 95 TH169-95 Flat Washer 2
28 TH169-28 Washer /13x20x1.5 6 63 TH169-63 Bracket Press Board 1 96 TH169-96 Carriage Bolt M8x25/8.8 2
29 TH169-29 Punching Bearing 8 64 WE102-64 Deck 1 97 TH169-97 1
30 TH169-30 B Type 10" Wheel Assy 2 65 TH169-65 Hex Flange Face Bolt
M6X12/8.8 2 98 TH169-98 Flat Washer 2
31 TH169-31 Inner Cover for B Type 10"
Wheel Hub 2 66 WE102-66 Outside Cover for B Type
7" Wheel Hub 2 99 TH169-99 Cross Recess Pan Head
Tapping 4
32 TH169-32 Washer for Inner Cover of
10" Wheel 39.3x13.1x1 2 67 TH169-67 B Type 7" Wheel Assy 2 100 TH169-100 Upper Cover for Battery 1
33 TH169-33 Flexible Washer 2 68 TH169-68 Front Drive Shaft Assy 1 101 TH169-101 II Type Hex Locknut
M4/8.8 4
34 TH169-34 Small Straight Gear (Ratchet
Wheel L) 1 69 TH169-69 Front Bracket Fastener 1 102 TH169-102 Fastener 1
35 TH169-35 Washer for Ratchet Wheel 2 70 TH169-70 Hex Flange Face Bolt A 1 103 TH169-103 Battery Pedestal 1
104 TH169-104 Battery 1

PARTS DIAGRAM - ENGINE

No. Part No. Description QTY No Part No. Description QTY No Part No. Description QTY
1 TH184-1 Nut M6 6 42 TH184-42 Waste Air Pipe 1 82 TH184-82 Carburetor Assy 1
2 TH184-2 Engine Cover 1 43 TH184-43 Speed Regulator
Rocker Spindle 1 83 TH184-83 Steel Gasket 1
3 TH184-3 Recoil Start Assy 1 44 TH184-44 Flat Washer 1 84 TH184-84 Prime Button 1
4 TH184-4 Blower Housing 1 45 TH184-45 Oil Seal 6x11x4 1 87 TH184-85 Air Filter Pedestal 1
5 TH184-5 Nut M14 X1.5 1 46 TH184-46 Springness Split Pin 1 87 TH184-86 Air Filter Bush 2
6 TH184-6 Start-up Hub 1 47 TH184-47 Handspike of Valve 1 88 TH184-87 Exhaust Gas Cover Board 1
7 TH184-7 Fan 1 48 TH184-48 Pull Spring of Valve 1 89 TH184-88 Paper Filter Element 1
8 TH184-8 Flywheel Assy 1 49 TH184-49 Speed Regulator
Rocker 1 90 TH184-89 Foam Filter Element 1
9 TH184-9 BoltM6X12 8 50 TH184-50 T Type Bolt M6×23 1 91 TH184-90 Air Filter Upper Cover 1
10 TH184-10 Respirator cover
plate 1 51 TH184-51 Speed Regulator Board 1 92 TH184-91 Crankcase Assy 1
11 TH184-11 Gasket of Respirator
Cover 1 52 TH184-52 Speed Regulator Pull
Spring 1 93 TH184-92 Oil Seal 2
12 TH184-12 Lubricate Filtering
Net 1 53 TH184-53 Nut M6 2 94 TH184-93 Ball Bearing 6205 1
13 TH184-13 Bolt M3 X 6 1 54 TH184-54 Muffler Cover Assy 1 95 TH184-94 Crankshaft Assy 1
14 TH184-14 Spring gasket 3 1 55 TH184-55 Muffler Assy 1 96 TH184-95 Connecting Rod Assy 1
15 TH184-15 Valve Element of
Respirator Cover 1 56 TH184-56 Heat Insulation Gasket of Muffler 1 97 TH184-96 Piston 1
16 TH184-16 Fuel Tank Cap 1 57 TH184-57 Spark Plug 1 98 TH184-97 Wrist pin ring 2
17 TH184-17 Sponge of Fuel Tank
Cap 1 58 TH184-58 Two Stud Bolt M6x94 4 99 TH184-98 Piston Pin 1
18 TH184-18 Seal Gasket of Fuel
Tank Cap 1 59 TH184-59 Gasket of Cylinder Head 1 100 TH184-99 Doctor-bar ring 2
19 TH184-19 Fuel Tank 1 60 TH184-60 Locating Pin of Cylinder
Head 2 101 TH184-100 Bushing Ring 1
20 TH184-20 Bolt M6x22 3 61 TH184-61 Intake Valve 1 102 TH184-101 Piston Ring II 1
21 TH184-21 Cushion Blocking 6 62 TH184-62 Exhaust Valve 1 103 TH184-102 Piston Ring I 1
22 TH184-22 Filtering Net Duct of
Fuel 1 63 TH184-63 Cylinder Head Assy 1 104 TH184-103 Lubricating Gauge Assy (Rubber Seal Gasket) 1
23 TH184-23 Oil Pipe Circlip I 1 64 TH184-64 Bolt M8x50 10 105 TH184-104 Lubricating Pipe ("O" Ring
20x2.6) 1
24 TH184-24 Oil Pipe 1 65 TH184-65 Handspike 2 106 TH184-105 Screw M4X12 2
25 TH184-25 Twisting clip 1 66 TH184-66 Guide Board of
Handspike 1 107 TH184-106 Gear Gasket 1
26 TH184-26 Oil Pipe Circlip II 1 67 TH184-67 Oil Seal Assembled of
Valve 2 108 TH184-107 Seal Gasket of Crankcase 1
27 TH184-27 II Type Locknut M6 3 68 TH184-68 Spring of Valve 2 109 TH184-108 Dowel Pin 2
28 TH184-28 Right Bracket of Fuel
Tank 1 69 TH184-69 Spring Coil of Exhaust Valve 2 110 TH184-109 Crankcase Cover 1
29 TH184-29 Left Bracket of Fuel
Tank 1 70 TH184-70 Valve hood 2 111 TH184-110 Flat Washer 2
30 TH184-30 Main Bracket of Fuel
Tank 1 71 TH184-71 Rocker Support Bolt of Valve 2 112 TH184-111 Bolt 2
31 TH184-31 Bolt 1 72 TH184-72 Rocker of Valve 2 113 TH184-112 Pin 2
32 TH184-32 Flat Washer 1 73 TH184-73 Adjust Nut of Valve 2 114 TH184-113 Camshaft Assy 1
33 TH184-33 Bolt 1 74 TH184-74 Combined Nut 2 115 TH184-114 Circlip of Gear Shaft 1
34 TH184-34 Detent Assy 1 75 TH184-75 Gasket I of Cylinder
Head Cover 2 116 TH184-115 Gear Shaft Hold-down Plate 1
35 TH184-35 Detent Bush 2 76 TH184-76 Cylinder Head Cover I 1 117 TH184-116 Sliding Sleeve 1
36 TH184-36 Blower Housing
Bush 3 77 TH184-77 Cylinder Head Cover II 1 118 TH184-117 Flat Washer 1
37 TH184-37 Abnormity Two Stud
Bolt II 2 78 TH184-78 Bolt M6x14 4 119 TH184-118 Gear Shaft Assy 1
38 TH184-38 Abnormity Two Stud
Bolt I 1 79 TH184-79 Paper Gasket I of Air Inlet Pipe 1 120 TH184-119 Gear Shaft of speed limit 1
39 TH184-39 Bolt M6X25 1 80 TH184-80 Air Inlet Pipe 1 121 TH184-120 Columnar Pin 2x8 1
40 TH184-40 Baffle 1 81 TH184-81 Paper Gasket II of Air
Inlet Pipe 1 122 TH184-121 Bolt M6x16 2
41 TH184-41 Ignition Assy 1
PARTS LIST - ENGINE



Page12
SPECIFICATION
Model ST-R50ES
Engine T675 - 200cc OHV
Engine Speed 2950rpm
Cutting Width 501mm
Cutting Height 25-75mm
Grassbag Capacity 60 litre
Deck Steel High Wheel
Sound Pressure Level 82.4 dB(A) (K=3)
Guaranteed Sound Power Level 96 dB(A)
Vibration 5.86m/s² (K=1.5)
Spark Plug NGK BPR6ES or Champion RN9YCC

EC Declaration of Conformity
We, Importer
Mower Magic
LN6 9AL
Declare that the product
Model: ST-R50ES
Complies with the following directives:
2006/42/EC- Machinery Directive
2004/108/EC- Electromagnetic Compatibility Directive
2000/14/EC amended by 2005/88/EC- Noise Emission in the Environment by Equipment for
Use Outdoors Directive.
The conformity assessment procedure followed was in accordance with
Directive 2006/42/EC Annex VI
Name of the Notified Body: TUV Product Service
Address:. No. 88 Heng Tong Road, Shanghai 200070, CHINA
-Measured Sound Pressure Level: 95.4 dB (A)
-Guaranteed Sound Power Level: 96 dB (A)
Standards and technical specifications referred to:
EN 836/A3:2004
ZEK01.2-08.2008
EN ISO 14982:2009
EN ISO 3744:1995
ISO 11094:1991
Authorised signatory and technical file holder
Date: 11/10/2012
Signature:
Name / title: Mr. Jonathan Hall/ Director
Magic House, Station Road, North Hykeham, Lincoln, LN6 9AL.

To order spare parts and see the complete range of garden
machinery and garden equipment from Sherpa, visit:
www.sherpatools.co.uk
Spares Hotline: [phone]