DR SP22 Quick start guide

Read and understand this manual and all instructions before operating the DR SP22 MOWER.
DR®SP22 MOWER
SAFETY & OPERATING INSTRUCTIONS
Serial No.
Order No.
DR Power Equipment
Toll-free phone: 1-800-DR-OWNER (376-9637)
Fax: [phone]
Website: www.DRpower.com
Original Language

2DR®SP22 MOWER
This indicates a hazardous situation, which, if not avoided, could result in death or serious injury.
Table of Contents
Chapter 1: General Safety Rules............................................................................................................................................................ 3
Chapter 2: Setting Up The DR SP22 MOWER...................................................................................................................................... 7
Chapter 3: Operating The DR SP22 MOWER....................................................................................................................................... 12
Chapter 4: Maintaining The DR SP22 MOWER ................................................................................................................................... 15
Chapter 5: Troubleshooting .................................................................................................................................................................. 18
Chapter 6: Parts Lists, Schematic Diagrams And Warranty ................................................................................................................ 19
Conventions used in this manual
Serial Number and Order Number
A Serial Number is used to identify your machine and is located on the Serial Number Label on your machine. An Order Number
is used to check and maintain your order history and is located on the upper left portion of your packing slip. For your
convenience and ready reference, enter the Serial Number and Order Number in the space provided on the front cover of this
manual.
Additional Information and Potential Changes
DR Power Equipment reserves the right to discontinue, change, and improve its products at any time without notice or obligation
to the purchaser. The descriptions and specifications contained in this manual were in effect at printing. Equipment described
within this manual may be optional. Some illustrations may not be applicable to your machine.
This indicates a hazardous situation, which, if not followed, will result in death or serious injury.
This information is important in the proper use of your machine. Failure to follow this instruction could result in damage to
your machine or property.
This indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.

CONTACT US AT www.DRpower.com 3
Read this safety & operating Instructions manual before you use the DR SP22 MOWER. Become familiar with the operation and
service recommendations to ensure the best performance from your machine. If you have any questions or need assistance,
please contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) and one of our Technical Support
Representatives will be happy to help you.
Chapter 1: General Safety Rules
Labels
Your DR SP22 MOWER carries prominent labels as reminders for its proper and safe use. Shown below are copies of all the
Safety and Information labels that appear on the equipment. Take a moment to study them and make a note of their location on
your Mower as you set up and before you operate the unit. Replace damaged or missing safety and information labels
immediately.
#32243
#32240
#32241
#32242
#
136491

4DR®SP22 MOWER
Tragic accidents can occur if the operator is not alert to the presence of children and pets. Children are often attracted to the
machine and the mowing activity.
Never assume that children will remain where you last saw them. Always follow these
precautions:
Keep children and pets at least 100 feet from the working area and ensure they are under the watchful care of a responsible
adult.
Be alert and turn the machine off if children or pets enter the work area.
Never allow children to operate the Mower.
Use extra care when approaching blind corners, shrubs, trees, or other objects that may block your view of a child or pet.
This is a high-powered machine, with moving parts operating with high energy. You must operate the machine safely. Unsafe
operation can create a number of hazards for you, as well as anyone else in the nearby area. Always take the following precautions
when using this machine:
Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their property, and
themselves.
Always wear protective goggles or safety glasses with side shields while using the Mower to protect your eyes from possible
thrown debris.
Avoid wearing loose clothing or jewelry, which can catch on moving parts.
We recommend wearing gloves while using the Mower. Be sure your gloves fit properly and do not have loose cuffs or
drawstrings.
Wear shoes with non-slip treads when using your Mower. If you have safety shoes, we recommend wearing them. Do not
use the machine while barefoot or wearing open sandals.
Wear long pants while operating the Mower.
Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing.
Keep bystanders at least 100 feet away from your work area at all times. Release the Blade Control Bar to stop the engine and
the Blade when another person or pet approaches.
Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or
explosion. Never overlook the hazards of gasoline. Always follow these precautions:
Never run the engine in an enclosed area or without proper ventilation as the exhaust from the engine contains carbon
monoxide, which is an odorless, tasteless, and deadly poisonous gas.
Store all fuel and oil in containers specifically designed and approved for this purpose and keep away from heat and open
flame, and out of the reach of children.
Replace rubber fuel lines and grommets when worn or damaged and after 5 years of use.
Fill the gasoline tank outdoors with the engine off and allow the engine to cool completely. Don't handle gasoline if you or
anyone nearby is smoking, or if you're near anything that could cause it to ignite or explode. Never overfill the tank and
reinstall the fuel tank Cap and fuel container cap securely.
The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or
other reproductive harm.
Protecting Yourself and Those Around You
Safety for Children and Pets
Safety with Gasoline - Powered Machines

CONTACT US AT www.DRpower.com 5
If you spill gasoline, do not attempt to start the engine. Move the machine away from the area of the spill and avoid creating
any source of ignition until the gas vapors have dissipated. Wipe up any spilled fuel to prevent a fire hazard and properly
dispose of the waste. If fuel is spilled on clothing, change clothing immediately.
Allow the engine to cool completely before storing in any enclosure. Never store a machine that has gas in the tank, or a fuel
container, near an open flame or spark such as a water heater, space heater, clothes dryer or furnace.
Never make adjustments or repairs with the engine running. Shut down the engine, disconnect the spark plug wire, keeping it
away from the spark plug to prevent accidental starting, wait 5 minutes before making adjustments or repairs.
Never tamper with the engine’s governor setting. The governor controls the maximum safe operation speed and protects the
engine. Over-speeding the engine is dangerous and will cause damage to the engine and to the other moving parts of the
machine.
Keep combustible substances away from the engine when it is hot.
Never cover the machine while the muffler is still hot.
Do not operate the engine with the air cleaner or the carburetor air intake cover removed. Removal of such parts could create
a fire hazard. Do not use flammable solutions to clean the air filter.
The muffler and engine become very hot and can cause a severe burn; do not touch.
Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground
away from your vehicle before filling.
Remove gas-powered equipment from the truck or trailer and refuel it on the ground. If this is not possible, then refuel such
equipment with a portable container, rather than from a gasoline dispenser nozzle.
Keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling is complete. Do not use
a nozzle lock- open device.
Operating this Mower safely is necessary to prevent or minimize the risk of death or serious injury. Unsafe operation can create a
number of hazards for you. This Mower is capable of amputating hands and feet and throwing objects. Always take the following
precautions when operating this Mower:
Your Mower is a powerful tool, not a plaything. Exercise extreme caution at all times. The machine is designed to mow grass.
Do not use it for any other purpose.
Ensure that the Mower is located flat on a level and clean area of lawn before starting.
Know how to stop the Mower quickly; see “stopping the engine” in chapter 3.
Never operate your unit on a slippery, wet, muddy, or icy surface. Exercise caution to avoid slipping or falling.
Always walk when mowing, never run.
Stop the blade when crossing surfaces other than grass, and when transporting the lawnmower to and from the area to be
mowed.
See manufacturer’s instructions for proper operation and installation of accessories. Only use accessories approved by DR
Power Equipment.
Never use the machine without ensuring that all guards and shields are in place.
Never, under any conditions, remove, bend, cut, fit, weld, or otherwise alter standard parts on the Mower. This includes all
shields and guards. Modifications to your machine could cause personal injuries and property damage and will void your
warranty.
Clear the area of objects such as rocks, wire, toys, etc., which could be thrown by the blade.
Keep hands and feet clear of the discharge opening at all times and only operate the Mower from the operator position
behind the handlebars.
Allow only one person to operate the Mower at any time.
Never direct discharged material toward anyone. Avoid discharging material against a wall or obstruction. Material may
ricochet back toward the operator.
Do not pull machine backward unless absolutely necessary. Always look down and behind before and while moving backward.
General Safety

6DR®SP22 MOWER
A Note to All Users
Under California law, and the laws of some other states, you are not permitted to operate an internal combustion engine using
hydrocarbon fuels without an engine spark arrester. This also applies to operation on US Forest Lands. All DR SP22 MOWERS
shipped to California, New Mexico, Oregon and Arizona are equipped with spark arresters. Failure of the owner or operator to
maintain this equipment in compliance with state regulations is a misdemeanor under California law and may be in violation of
other state and/or federal regulations. Contact your State Park Association or the appropriate state organization for specific
information in your area.
No list of warnings and cautions can be all-inclusive. If situations occur that are not covered by this manual, the operator must
apply common sense and operate this DR SP22 MOWER in a safe manner. Contact us at www.DRpower.com or call 1-800-DR-
OWNER (376-9637) for assistance.
If the machine should start making an unusual noise or vibration, stop the engine, wait five minutes to allow all parts to cool.
Disconnect the spark plug wire, keeping it away from the spark plug, then inspect for damage. Vibration is generally a
warning of trouble. Check for damaged parts and clean, repair and/or replace as necessary.
Never tamper with safety devices. Check their proper operation regularly.
Before performing any maintenance procedure or inspection, stop the engine, wait five minutes to allow all parts to cool.
Disconnect the spark plug wire, keeping it away from the spark plug.
Never allow people who are unfamiliar with these instructions to use the Mower. Allow only responsible individuals who are
familiar with these rules of safe operation to use your machine.
Never overload or attempt to mow material beyond the manufacturer’s recommendation. Personal injury or damage to the
machine could result.
While using the Mower, don't hurry or take things for granted. When in doubt about the equipment or your surroundings,
stop the machine and take the time to look things over.
Never operate the machine when under the influence of alcohol, drugs, or medication.
Use the machine only in daylight.
Keep all nuts and bolts tight and keep the equipment in good operating condition.

CONTACT US AT www.DRpower.com 7
Handlebar
Blade control
bar
Figure 1
Traction
Clutch Bar
Oil
Fill/Dipstic
k
Grass
Catcher
Cutting Height
Lever
A
ir Filte
r
Fuel Tank
Cap
Knob
Pull Start
Handle
Ball Bearing
Wheels
Cast Aluminum
Deck
Chapter 2: Setting Up the DR SP22 MOWER
It may be helpful to familiarize yourself with the controls and features of your DR SP22 MOWER as shown in Figure 1 before
beginning these procedures. If you have any questions at all, please feel free to contact us at www.DRpower.com.
DR SP22 MOWER Controls and Features

8DR®SP22 MOWER
Specifications
Engine See Engine Manufacturers Manual
for detailed Engine information
Cutting Width 560mm (22 inch)
Cutting Height 9 Heights, 1" to 3.4"
Deck Material Cast Aluminum
Wheel Size 8" x 1.75" Front, 9" x 1.75" Rear
Dimensions 63" L x 24" W x 43" H
Weight 108 lbs.
Parts Supplied in Shipping Box:
* = Hardware Package (Figure 2)
Item # Part # Description Qty
1* ........... 32257 .............. Knob, Handlebar ............................ 4
2* ...........32256 .............. Bolt, Carriage, Short....................... 2
3* ...........32296 .............. Bolt, Carriage, Long ....................... 2
4* ...........32530 .............. Nut, Nylon Lock M6....................... 2
5* ...........32293 .............. Guide, Pull Start ............................. 1
6 ............. 32368 ..............Mulching Plug ................................ 1
7 ............. 32290.............. Lower Handlebar............................ 1
8 ............. ........................ Upper Handlebar Assembly........... 1
Compare the contents of the Shipping Box with the “Parts Supplied” list above.
If you have any questions please contact us at www.DRpower.com or call 1-800-
DR-OWNER (376-9637) for assistance.
Assembling the Mower
Tools Needed:
10mm Wrench
Installing the Handlebars
1. Insert the pins of the Lower Handlebar into the holes of Handlebar Brackets
(Figure 3). Insert the short Carriage Bolts through the Lower Handlebar and
Brackets. Install and tighten the Lower Handlebar Knobs onto the Carriage
Bolts as tight as you can by hand.
Note: make sure the Drive Cable goes under the Lower Handlebar for proper
clearance in the next step.
2. Carefully position the Upper Handle with Cables onto the Lower Handlebar
(Figure 4). Insert the long Carriage Bolts through the Upper and Lower
Handlebars. Install and tighten the Upper Handlebar Knobs onto the
Carriage Bolts as tight as you can by hand.
5
Figure 2
4
3
2
1
Folding or unfolding the handle improperly can damage the cables, causing
an unsafe operating condition.
Do not damage the cables when folding or unfolding the handle.
If a cable is damaged, contact us at www.DRpower.com.
Lower
Handlebar
Figure 3
Carriage
Bolt
Lower Handle
Knob
Handlebar
Bracket Pin
Upper
Handlebar
Figure 4
Long Carriage Bolt
Upper
Handle Knob
Lower
Handleba
r
Drive Cable
Engine Brake
Cable

CONTACT US AT www.DRpower.com 9
Installing the Pull Start Guide and Handle
Note: The Pull Start Guide may have already been installed at the factory.
1. Ensure that one of the Locknuts is screwed all the way onto the threads of
the Pull Start Guide (Figure 5).
2. Insert the Pull Start Guide into the lowest open hole on the right hand side
of the Upper Handlebar.
3. Secure the Pull Start Guide to the Upper Handlebar with a Locknut using a
10mm Wrench.
4. Pull the Pull Start Handle up to the Pull Start Guide and insert the Rope
into the Guide as shown.
Installing the Grass Catcher
Note: If you are installing the Grass Catcher prior to operation, remove the
Mulching plug shipped in the rear of the machine (not shown).
1. Hold the Discharge Guard in the upright position (Figure 6).
2. Place the Hooks of the Grass Catcher onto the Discharge Chute Bar on both
sides.
3. Lower the Guard onto the Grass Catcher.
Adding Oil and Gasoline
Engine Oil SAE 30: above 40 degrees F; 10w-30: 10-90 degrees F;
5w-30: 40 degrees F or below
Fuel Unleaded gasoline
Note: Refer to the Engine Manufacturers Manual for more detailed Engine information.
Tip: To avoid confusion, we recommend leaving the caps ON the Fuel and Oil Fills until you are ready to pour either gasoline or
oil into the correct Fill.
Note: You will need approximately 15 to 22 ounces of high detergent oil depending on Engine type. Use only high detergent oil classified
“For Service SF, SG, SH, SJ” or higher. Do not use special additives. Other types of oil could cause problems with the operation
of your machine. Please refer to your Engine Owner’s Manual provided with your mower for detailed information on oil quantity
and cold temperature oil specifications.
You must add oil before starting the engine. This machine is shipped without oil. Traces of oil may be in the reservoir from
factory testing, but you must add oil before starting the engine.Fill the reservoir slowly, checking the level frequently to
avoid overfilling.
To get an accurate reading when checking the oil level:
- The machine should be on a level surface.
- To ensure an accurate oil level reading, DO NOT screw the dipstick down.
Pull Start
Guide
Figure 5
Locknuts
Pull Start
Handle
Upper
Handlebar
(right side)
Hook
Figure 6
Bar
Grass Catcher
Discharge
Guard

10 DR®SP22 MOWER
1. Place the machine on a level surface remove the Dipstick (Figure 7).
2. Machines are shipped with no oil. Initially add 16 oz. of the oil
recommended by the Engine Manufacturer. Wait one minute for the oil to
settle.
3. Replace the Dipstick, but DO NOT screw it in, to ensure an accurate reading
and then remove it to check the oil level (clean the Dipstick with the rag after
checking).
4. Continue adding a few ounces of oil at a time, rechecking the Dipstick until
the oil reaches the fill mark. Be careful not to overfill.
5. Replace the Dipstick and screw all the way down when full.
6. Remove the Gas Fill Cap and fill the Gas Tank with fresh, unleaded gas (with a minimum of 85 Octane) to approximately 1" to
1-1/2" below the top of the fill neck to allow for fuel expansion (Figure 7). Be careful not to overfill and reinstall the Gas Fill
Cap before starting the engine. See your Engine Owner’s Manual for more detailed information.
NOTE: To refill the gas tank, turn the engine OFF and let the engine cool at least five minutes before removing the gas fill cap.
Figure 7
Fuel Fill
Oil Fill
Gasoline is extremely flammable and explosive. A fire or explosion from gasoline can burn you and others.
To prevent a static from igniting the gasoline, place the container and/or mower directly on the ground before filling, not in a
vehicle or on an object.
Fill the tank outdoors when the engine is cold. Wipe up spills.
Do not handle gasoline when smoking or around an open flame or sparks.
Store gasoline in an approved fuel container, out of the reach of children.

CONTACT US AT www.DRpower.com 11

12 DR®SP22 MOWER
Chapter 3: Operating the DR SP22 MOWER
It may be helpful to better familiarize yourself with the features of your Mower by reviewing Figure 1 in Chapter 2 before beginning
the steps outlined in this chapter.
Adjusting the Cutting Height
Use the Height Adjustment Lever to set all four Wheels to the same cutting
height as desired (Figure 8). Pull Lever outward, move Lever to desired position,
and release Lever to lock in notch.
Notch Position Cutting Height
1st: Fully towards rear of mower 1.0 inch (2.5 cm)
2nd: 1.2 inch (3.0 cm)
3rd: 1.4 inch (3.5 cm)
4th: 1.7 inch (4.3 cm)
5th: 2.0 inch (5.0 cm)
6th: 2.3 inch (6.0 cm)
7th: 2.7 inch (6.8 cm)
8th: 3.0 inch (7.8 cm)
9th: Fully towards front of mower 3.4 inch (8.6 cm)
Starting the Engine
1. Turn the Fuel Shutoff Valve to the “OPEN” position (Figure 9).
2. Stand behind the Mower. Hold the Blade Control Bar against the Handle in
the “Operating Position” (Figure 10).
3. Grasp the Recoil Starter Rope Handle, and pull slowly until resistance is felt.
Then pull rapidly to overcome engine compression and to prevent kick back
and start the engine.
Figure 10
Recoil Starter
Ro
p
e Blade
Control
Bar
Always be aware that the blade is cutting (spinning) while engine is running.
The blade is sharp; contacting the blade can result in serious personal injury.
Height
A
djustment
Lever
Figure 8
Height Locking
Notches
1st Notch
(see table)
Adjusting the cutting height may bring you into contact with the mowing
blade, causing serious injury.
Stop the engine and wait for all moving parts to stop.
Do not put your fingers under the housing when adjusting the cutting
height.
If the engine has been running, the muffler will be hot and can severely burn
you. Keep away from the hot muffler.
Read and understand all warnings listed in “Chapter 2 General Safety Rules” before operating this Mower.
Fuel Valve
Figure 9
Label

CONTACT US AT www.DRpower.com 13
Note: When starting the engine for the first time or if the engine has run out of fuel, it will take extra cranking time to move fuel from the
tank to the engine.
Stopping the Engine and Blade
1. Release the Blade Control Bar to stop the Engine (Figure 11).
Forward Travel
TO TRAVEL FORWARD
1. Pull the Drive Bar to Handle and hold (Figure 12).
Note: You can vary the speed of the machine by slightly releasing the Drive Bar to
allow belt slip on the Transmission.
TO STOP TRAVEL FORWARD
1. Release the Drive Bar.
Note: Do not pull mower backward when you are using self forward travel.
Using the Grass Catcher
1. Hold the Discharge Guard in the upright position (Figure 13).
2. Place the Hooks of the Grass Catcher onto the Discharge Chute Bar on both
sides.
3. Lower the Guard onto the Grass Catcher.
4. Reverse the previous procedures for emptying the Bag.
Operating Tips
Clear the area of sticks, stones, wire, branches, and other debris that the
blade could hit.
Avoid striking solid objects with the blade. Never deliberately mow over any
object.
If the mower strikes an object or starts to vibrate, immediately stop the
engine, disconnect the wire from the spark plug, and examine the mower for
damage.
For best performance, install a new blade before the cutting season begins.
Replace the blade when necessary with a DR Power Equipment replacement
blade.
Blade Control
Ba
r
Figure 11
Drive Bar
Figure 12
Disengage
Engage
Stop the engine and wait for all moving parts to stop before leaving the
operating position.
When you release the blade control bar, both the engine and blade should
stop within 3 seconds. If they do not stop properly, stop using your
mower immediately and contact us at www.DRpower.com or call toll-free
1-800-DR-OWNER (376-9637).
Hook
Figure 13
Bar
Grass Catcher
Discharge
Guard

14 DR®SP22 MOWER
Mulching Plug
The Mulching plug can be inserted under the Discharge Guard into the hole at the rear of the Mower. This will keep the clippings
contained in the housing for more complete processing (mulching) of leaves and grass clippings.
Cutting Grass
The Engine always operates at full throttle when mowing to assure better mowing performance and proper discharge of
material. The engine is equipped with an Auto-choke, which will cause the engine to run at a lower RPM when first started.
Allow the engine to come up to full speed prior to use.
Do not cut more than a third of the grass blade at a time.
When cutting grass over 6 inches (15 cm) tall, mow at the highest cutting height setting and walk slower; then mow again at a
lower setting for the best lawn appearance. If the grass is too long, the mower may plug and cause the engine to stall.
Mow only dry grass or leaves. Wet grass and leaves tend to clump on the yard and can cause the mower to plug or the engine
to stall.
Alternate the mowing direction. This helps disperse the clippings over the lawn for even fertilization.
If the finished lawn appearance is unsatisfactory, try one or more of the following:
oReplace the blade or have it sharpened.
oWalk at a slower pace while mowing.
oRaise the cutting height on your mower.
oCut the grass more frequently.
oOverlap cutting swaths instead of cutting a full swath with each pass.
Cutting Leaves
After cutting the lawn, ensure that half of the lawn shows through the cut leaf cover. You may need to make more than one
pass over the leaves so more of the lawn shows through.
Slow down your mowing speed if the mower does not cut the leaves finely enough.
Slope Operation
Wet grass or leaves can cause serious injury if you slip and contact the blade. Mow only in dry conditions.
Slopes are a major factor related to slip and fall accidents, which can result in severe injury. Operation on all slopes requires extra
caution. If you feel uneasy on a slope, do not mow it.
Mow across the face of slopes; never up and down. Exercise extreme caution when changing direction on slopes.
Watch for holes, ruts, bumps, rocks, or other hidden objects. Uneven terrain could cause a slip and fall accident. Tall grass
can hide obstacles.
Do not mow on wet grass or excessively steep slopes. Poor footing could cause a slip and fall accident.
Do not mow near drop-offs, ditches, or embankments. You could lose your footing or balance.

CONTACT US AT www.DRpower.com 15
Chapter 4: Maintaining the DR SP22 MOWER
Regular maintenance is the way to ensure the best performance and long life of your machine. Please refer to this manual and the
engine manufacturer's owner's manual for maintenance procedures. Service intervals listed in the checklist below supersede
those listed in the engine manufacturer's owner's manual.
Regular Maintenance Checklist
P
ROCEDURE BEFORE EACH USE EVERY 25 HOURS EVERY 100 HOURS
Check Engine Oil Level 
Check General Equipment Condition 
Check Blade for Sharpness 
Remove grass clippings and dirt from
under the housing

Clean Engine Exterior & Cooling Fins 
Check Belt Tension and Condition 
Clean Air Filter 
Change Engine Oil 1st time 5 hours 
Replace Air Filter 
Replace Spark Plug 
Checking the Engine Oil Level
1. Remove the dipstick, wipe it clean, and insert it back into the Oil Fill but do
not screw it in (Figure 14).
2. Remove the dipstick and check the oil level (Figure 15). If the oil level is
below the “Add” mark on the dipstick, slowly pour oil into the oil fill tube
until the oil level reaches the “Full” line on the dipstick. Do not overfill. (See
your Engine users manual for detailed information on Oil type and quantity)
3. Insert and fully screw in the dipstick when the Oil level is correct.
Changing Engine Oil
Tools and Supplies Needed:
Oil (see engine owner’s manual)
Rags and approved waste oil Container
Run the engine a few minutes before changing the oil to warm it. Warm oil flows better and carries more contaminants.
Before performing any maintenance procedure or inspection on the Mower, release the blade control bar to shut down the engine,
wait 5 minutes for parts to cool and then remove the spark plug wire keeping it away from the spark plug.
Figure 14
Fuel Fill
Oil Fill
To get an accurate reading when checking the oil level:
- The machine should be on a level surface.
- To ensure an accurate oil level reading, DO NOT screw the dipstick
down.
Operating
Range
Figure 15
“H” Oil Level
Too High “L” Oil Level
Too Lo
w

16 DR®SP22 MOWER
1. Ensure the Fuel Cap is tight and remove the Dipstick (Figure 14).
2. Tip the mower onto its side (with the air filter up) to drain the used oil out
through the oil fill tube (Figure 16). Lower the machine when done.
3. Slowly pour fresh oil into the oil fill tube until the oil level reaches the Full
line on the dipstick. See procedures in “Checking the Engine Oil Level” for
reference. Do not overfill.
4. Insert and fully screw in the dipstick when the Oil level is correct.
5. Dispose of the used oil properly at a local recycling center.
Replacing the Blade
Tools and Supplies Needed:
5/8" Socket and Torque Wrench
Block of Wood
IMPORTANT: You will need a torque wrench to install the blade properly. If you
do not have a torque wrench or are uncomfortable performing this procedure,
contact us at www.DRpower.com.
Examine the blade whenever you run out of gasoline. If the blade is damaged or
cracked, replace it immediately. If the blade edge is dull or nicked, have it
sharpened or replace it.
1. Block up the Mower to gain access under the Deck.
2. Use a block of wood to hold the blade steady (Figure 17).
3. Remove Bolt, Large Washer and the blade, saving all mounting hardware.
Note: The Blade Adapter might come off the Engine Shaft. Ensure that the Blade
Adapter and Shaft Key are in place when reinstalling the Blade.
IMPORTANT: Make sure in the following step that you position the curved ends
of the blade pointing up toward the mower housing.
4. Position the new Blade with its holes aligned with the pins of the Blade
Adapter and secure with the large Washer and Bolt.
5. Use a torque wrench to tighten the blade bolt to 30 ft-lb (40 Nm).
Replacing the Drive Belt
Tools and Supplies Needed:
Philips Head Screwdriver
12mm Wrench
8mm Wrench
1. Remove the Screw from the upper Belt Cover and remove the Belt Cover
(Figure 18).
Note: There are two Tabs at the back of the Belt Cover that snap into the Frame of
the Mower. You will need to push down and forward at the area of the Tabs to
release the Cover from the Frame.
2. Remove the Transmission Bracket Bolt using a 12mm Wrench (Figure 19).
Transmission
Bracket
Figure 19
Bolt
Transmission
Oil Tube
Figure 16
The blade is sharp; contacting the blade can result in serious personal injury.
Wear gloves when servicing the blade.
Blade
Figure 17
Blade Adapte
r
Bolt and Large
Washer
Wood
Block
Loosen
Tighten
Screw
Figure 18
Tabs
Upper Belt
Cover

CONTACT US AT www.DRpower.com 17
3. Slide the Transmission Bracket over (step 1) so the Transmission can be
tilted forward (step 2) to allow the Belt to be removed from the pulley
(Figure 20).
4. Remove the two Screws from the top side of the lower Belt Guard with an
8mm Wrench (Figure 21).
5. Remove the Blade as described on the previous page.
6. Pull the Lower Belt Guard down enough so you can remove the Belt from the
Engine Pulley (Figure 22).
7. Remove the Belt from the machine.
8. Install the new Belt using the reverse order of the previous steps.
9. When the Transmission is rotated back into position, make sure the metal
portion of the Transmission Cable is inserted fully into hole in the
Transmission Post (Figure 23). There is a flat area on the metal portion of
the Cable that must rest against the Transmission Bracket. Also check that
the Cable Spring is attached to the Transmission.
Adjusting the Engine Brake and Drive Cables
The Cables are adjusted at the factory and should not need any initial
adjustment. A worn Belt and machine use however can cause the Cables to
need some adjustment. Perform the following procedures if the Engine is not
stopping properly when the upper Bar is released or if the Wheels are not
engaging properly when the lower Bar is pulled to the Handlebar.
1. Loosen the top Jam Nut and tighten the bottom Jam Nut to tighten the
Cable (Figure 24).
2. Loosen the bottom Jam Nut and tighten the top Jam Nut to loosen the
Cable.
3. Tighten both Nuts towards each other against the Bracket to hold the
adjustment location.
Cleaning the Mower
1. For best results, clean the mower soon after you have completed mowing.
2. With the engine running on a flat paved surface, spray a stream of water in
front of the right rear wheel.
3. The water will splash into the path of the blade, cleaning out the clipping.
4. When no more clippings come out, stop the water and move the mower to a
dry area.
5. Run the engine for a few minutes to dry the housing.
Figure 20
Pulley
Drive
Belt
Drive
Cable
1
2
Lower Belt
Guard
Figure 21
Screws
Engine
Pulley
Figure 22
Lower Belt
Guard
Belt
Drive
Cable
Spring
Figure 23
Transmission
Post Drive Cable
Stop (flat on
bottom)
J
am Nuts
Figure 24
Cable Threads
Engine Brake Cable
Drive Cable

18 DR®SP22 MOWER
Before performing any maintenance procedure or inspection on the Mower, release the blade control bar to shut down the engine,
wait 5 minutes for parts to cool and then remove the spark plug wire keeping it away from the spark plug.
Chapter 5: Troubleshooting
Most problems are easy to fix. Consult the Troubleshooting Table below for common problems and their solutions. If you
continue to experience problems, contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) for support.
Troubleshooting Table
SYMPTOM POSSIBLE CAUSE
Recoil will not pull out
or is difficult to pull.
The engine is difficult to start in heavy or high grass. Move the mower to a clean dry
surface.
Make sure the blade control lever is in operating position.
Check the Engine oil level, the Engine may be seized.
There may be an oil compression lock in the Cylinder. Take out the Spark Plug; hold a rag
over the Spark Plug hole and pull the Recoil Cord several times to blow out any oil in the
Cylinder. Wipe off the Spark Plug and reinstall it.
The Recoil may be broken or jammed. Visit our web site at www.DRPower.com or call 1-
800-DR-OWNER (376-9637) for assistance.
The Engine will not start
(Please refer to the
Engine Owner’s Manual
for Engine-specific
procedures.)
Make sure the blade control lever is in operating position.
Make sure the fuel valve is in the ON position. Refer to engine operator manual.
The engine is difficult to start in heavy or high grass. Move the mower to a clean dry
surface.
Check for proper attachment of the Spark Plug wire.
Check that the Engine has the right amount of clean oil. If the oil is dirty, change it
following the procedure in Chapter 2.
You should be using fresh, clean, unleaded gas. If the gas is old, change it. Use a fuel
stabilizer if you keep gas longer than one month.
Check that the Air Filter is clean. If it is dirty, change it following the procedure in the
Engine Owner’s Manual.
Make sure that the Spark Plug is clean. If the Spark Plug is dirty or cracked, change it. If
it’s oily, leave it out, hold a rag over the Spark Plug hole and pull the Recoil Cord several
times to blow out any oil in the Cylinder, then wipe off the Spark Plug and reinsert it.
If the Engine still will not start, visit our web site at www.DRPower.com or call 1-800-DR-
OWNER (376-9637) for assistance.
The Engine will not stop. Release the blade control lever. If the engine does not stop when the blade control lever is
released, pull the spark plug wire off the spark plug using insulated handle pliers.
Check the engine stop cable. Replace the cable if bent or damaged.

CONTACT US AT www.DRpower.com 19
Troubleshooting Table (continued)
SYMPTOM POSSIBLE CAUSE
Engine smokes. Check the oil level and adjust as needed.
You may be operating the machine on too great an incline.
Check the Air Filter and clean or replace as needed.
You may be using the wrong oil - too light for the temperature. Refer to your Engine
Owner’s Manual for detailed information.
Clean the Engine cooling fins and the carburetor housing if they are dirty.
If the Engine still smokes, visit our web site at www.DRPower.com or call 1-800-DR-OWNER
(376-9637) for assistance.
The Engine lacks power
or is not running
smoothly.
(Please refer to the
Engine Owner’s Manual
for Engine-specific
procedures.)
Check the height of cut settings. Raise the height of cut if the grass is high.
Allow the engine to fully warm up if it is cold. The Auto Choke feature requires a cold engine
to heat to operating temperature prior to achieving full operating RPM.
Check the bottom of the mower housing. Clean the blade housing of grass and other debris.
Check for debris (hay seed, etc.) clogging the Air Filter Intake and clean out as required.
The Engine’s Blower Housing, Throttle Linkage, and Cooling Fins should be free of debris.
Clean them following the instructions in the Engine Owner’s Manual.
Check that the Air Filter is clean. If it is dirty, change it following the procedure in the
Engine Owner’s Manual.
Remove the Spark Plug wire and dry the connection with a rag.
The Spark Plug may be dirty or cracked, change it. If it’s oily, leave it out, hold a rag over
the Spark Plug hole and pull the Recoil Cord several times to blow out any oil in the
Cylinder, then wipe off the Spark Plug and reinsert it.
You should be using fresh, clean, unleaded gas. If it is old, change it. Use a fuel stabilizer
if you keep gas longer than one month.
Check that the Engine has the right amount of clean oil. If it is dirty, change it following the
procedure in Chapter4.
If your Engine still lacks power, visit our web site at www.DRPower.com or call 1-800-DR-
OWNER (376-9637) for assistance.
Excessive Vibration Remove the blade and check the blade and balance.
Check for a bent or broken blade. A DAMAGED BLADE IS DANGEROUS AND MUST BE
REPLACED.
Check the blade adapter. Replace a broken blade adapter.
If the vibration continues, visit our web site at www.DRPower.com or call 1-800-DR-OWNER
(376-9637) for assistance.
The grass will not
discharge correctly.
Clean the bottom of the mower housing.
Check for a badly worn blade. Remove and sharpen the blade. For safety, replace the blade
every two years with a DR Power replacement blade.
Check grass catcher. Clean and dry grass catcher as needed.
The engine speed is too slow. Place throttle control in FAST position.
The grass is not cut
even.
Make sure the blade is sharp.
Check for a bent or broken blade. A DAMAGED BLADE IS DANGEROUS AND MUST BE
REPLACED.
Check the blade adapter. Replace a broken blade adapter.
Check grass catcher. Clean and dry grass catcher as needed.

20 DR®SP22 MOWER
Chapter 6: Parts Lists and Schematic Diagrams
Parts List – Engine and Drive Assembly
NOTE: Part numbers listed are available through DR Power Equipment.
Ref# Part# Description
1 32245 Cover, Wheel
2 32246 Retainer, Wheel
3 32247 Washer, Wheel
4 32248 Bearing, Wheel
5 32241 Wheel, 8” X 1.75”
6 32249 Screw, Axle Retaining
7 32250 Bracket, Front Axle
8 32251 Bushing, Front Axle
9 32244 Axle, Front
10 32242 Wheel, 9” X 1.75"
11 32252 Cover, Inner, Rear Wheel
12 32253 Bracket, Flap
13 32243 Axle, Rear
14 32529 Screw, Philips M6
15 32254 Bracket, Height Adjust
16 32530 Nut, Nylon lock M6
17 32255 Flange, Handlebar Bracket
18 32256 Bolt, Carriage, Short
19 32257 Knob, Handlebar
20 32258 Bracket, Handlebar, Right
21 32259 Nut, Handlebar Bracket
22 32260 Cotter Pin, Discharge Guard
23 32261 Bushing, Discharge Guard
24 32531 Ring, Quicklock
25 32262 Bar, Discharge Guard
26 32263 Spring, Torsion, Guard
27 32264 Clip, Outer, Transmission
28 32265 Gear, Right
29 32266 Pin, Right, Trans
30 32267 Bearing, Trans
31 32268 Seat, Bearing
32 32269 Handle, Height Adj
33 32270 E Clip, Trans
34 32271 Transmission
35 32272 Bracket, Trans
36 32273 Bolt, Trans Link
Ref# Part# Description
37 32274 Knob, Height Adj
38 32275 Pin, Left, Trans
39 32276 Washer, Trans
40 32277 Gear, Left
41 32278 Guard, Discharge
42 32366 Belt
43 32279 Plate, Discharge
44 32280 Bracket, Handlebar Left
45 32281 Linkage, Height Adj
46 32532 Screw, Cap, M6
47 32282 Spring, Height Adjust
48 32283 Deck, Aluminum
49 32533 Washer, 8
50 32534 Screw, Self Tapping, #10
51 32284 Plate, Deflector
52 32535 Screw, Philips, M6
53 32285 Cover, Upper Belt
54 32286 Cotter Pin, Foot Flap
55 32287 Bar, Foot Flap
56 32288 Flap, Foot
57 32404 Engine, DR SP22, EA175V, M/S
58 22214 Bolt, 7/16-20 x 2.25", GR8, ZP
59 32361 Washer, Belleville, Blade
60 32362 Blade
61 32363 Pin, Blade Adapter
62 32364 Adapter, Blade
63 32536 Key, Woodruff, #505
64 32537 Bolt, Tri lobe
65 32538 Screw, Set, M6 X 8
66 32367 Pulley, Sp Drive
67 32365 Cover, Lower Belt
Not Shown
32368 Mulching Plug