Newstripe 4250 TM User manual

4250™ Manual / 3947.0816
4250™ Airless
Product Manual

4250™Airless Sprayer
Table of Contents
1700 Jasper St., Unit F, Aurora, CO 80011 T800.624.6706 F303.364.7796 •Newstripe.com
4250™ Table of Contents / 3947.0816
Precautionary Warning…........ Page 1
Assembly……………………. Page 2
Operation …………………… Page 3
Spray Tip Cleaning…………. Page 4
Cleaning Procedure…………. Page 4
Cleaning Procedure……..…… Page 5
(Extended Periods)
Cleaning Procedure….……… Page 5
(Winter Storage)
Maintenance………………… Page 5
Parts List…………………….. Page 6
Engine Lubricant & Parts…… Page 6
Airless Pump Parts..………….Page 7
Airless Pump Detail………….Page 7
Troubleshooting Guide………Page 8
Warranty……………………..Page 10
Thank you!For your purchase of the
Newstripe 4250™ Sprayer.
Please read over the instructions and
make sure you understand operating
procedures before using the unit.
Please check the serial number on your
unit. This Manual is for units with
serial number 1015159 and above
only. For units with serial numbers
below 1015159, please contact
Newstripe for the correct manual.

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
PRECAUTIONARY WARNING!
• Please read and understand all operation instructions as detailed
in this manual. Failure to follow specified instructions may result in
equipment damage or serious injury to personnel up to and
including death!
• TO BE USED ONLY WITH WATER BASED PAINTS.
• Skin Injection Hazard: High Pressure spray can inject toxins into
blood stream. If injection occurs, seek emergency medical
treatment.
• ALWAYS release pressure in the system before changing or
cleaning the spray tip.
• ALWAYS use the nozzle tip guard.
• ALWAYS engage the Trigger Lock on the spray gun before
removing the spray gun for hand operation.
• NEVER place you hands or any body parts in front of the spray
gun.
• NEVER point the spray gun at or spray other persons or animals.
• NEVER clean the spray tip while it is attached to the spray gun.
Remove the spray tip from the gun to clean the tip guard.
• NEVER remove spray tip while cleaning the pump.
• NEVER use pliers to tighten or loosen high pressure fittings on
Outlet side of pump.
• Use only in well-ventilated area.
• Always consult your Facility Safety and/or Personnel Department
for specified safety protocols prior to operating this equipment.

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
ASSEMBLY
1. Remove the unit from the crate. Check for any damage
that may have occurred during shipment. Advise factory
immediately if you see any damage.
2. Set the handles behind the unit with the gun off to the
right side. Attach the bottom of the handles to the back
of the chassis with 5/16-18x1 1/2”hex head bolts,
washers and lock nuts. Hand tighten only at this time.
3. Rotate the handle assembly upward and then rotate
each handle brace (connected at the back axle) upward
so that the holes in the braces line up with the upper
holes in the handle assembly. Attach the top of the
braces to the handles with 5/16-18x1 ½” carriage bolts,
and nuts. Tighten all bolts at this time.
4. Set the pail on chassis. Place the suction and return
hoses into the pail and then clip them together with the
metal clip inside pail. Insert the hoses into the notches
of the lid and then snap lid onto the pail.
5. Unpack the spray gun and mounting bracket from the
bag attached to the cable on the handle assembly.
6. Loosen the two 5/16” bolts on the front of the chassis
and then slide the spray gun support tube outward to
the right until the end of it is flush with the left side of
the receiver. Snug the two 5/16” bolts to secure it in
place.
7. Slide the spray gun mounting bracket (with gun) onto
the upright of the support arm and hand tighten the star
knob.
8. Check placement of the spray gun in the gun bracket.
Spray gun should be located so that there is room
between the trigger and lifting bar that lifts trigger
(1/8”-3/16”). This will allow the gun to shut off
completely when the trigger is released.
9. There should also be enough room to push the trigger
lock sideways. If the trigger lock will not push, release the
gun clamp and slide gun backward until you can push the
trigger lock. Re-clamp gun.
NOTE to release trigger lock: Push the trigger lock
in on the right side (outside) of the gun.
10. Attach one end of the spray hose to the pump outlet
with a ¾” wrench and the other end to the spray gun.
You will need two wrenches (3/4” and 11/16” or two
adjustable wrenches) to secure the hose on the spray
gun. Make sure both connections are tight.
11. This unit shipped WITHOUT oil and gas. Fill engine with
16 ounces of SAE 10W30 motor oil that has a service
grade of SF or higher. Check the oil level in the engine
before starting.
12. Fill the fuel tank with unleaded fuel. (87 or higher
octane)
13. Make sure that the static chain is contacting the ground
(Attached to the bottom side of the frame).
14. If unit was shipped with suction hose removed at the
pump. (Garden hose type fitting). Depress Inlet Valve
Stem to ensure it moves freely. Attach suction hose.
Hose fitting should only be hand tightened. You may
also need to perform this operation any time the pump
does not want to prime.
3
2
1
6
Pic 2
PIC 1
Pic 3
Pic 4

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
OPERATION
We recommend spraying with water first to become familiar with pump operation.
1. Turn spray control (black knob) to the Prime/
re-circulating position (arrows in a circle) in line
with arrow on side of pump housing.
2. Turn pressure control (gold knob) out (counter-
clockwise) several turns until it spins freely.
3. Start Engine and throttle up to increase engine
speed and let pump run for 60 seconds.
4. Turn pressure control knob in (clockwise) until it
stops. Liquid should flow back through return
hose. DO NOT OVER TIGHTEN
5. Turn Spray Control knob to spray position.
(Spray gun symbol in line with arrow on side of
pump housing)
6. Activate trigger and paint (or water) will spray
from the gun.
7. Adjust pressure by turning pressure control
knob counter clockwise until spray pattern
decreases, then increase pressure by turning
clockwise just to where you get a good even
spray pattern.
8. Adjust spray gun height for proper line width.
9. When finished spraying or if machine will be left
unattended for any amount of time, turn Spray
Control Knob to Re-circulating Position, turn off
engine and pull spray trigger to release pressure
from the system.
OPERATIONAL NOTE!
NOTE: If pump does not prime, then back out the pressure control
knob several turns (counter clockwise) until loose. Leave spray
control knob in prime/re-circulating position and let pump run for
ONE MINUTE. Then turn the pressure control knob back in until it
stops. Push outlet button 3 times. Pump should now prime.
NOTE: If the pump primes and air bubbles continue to appear in the
return hose after one minute, the suction hose fitting may not be
tight enough or the rubber washer may be worn. Turn off machine,
turn spray valve to prime position and depress spray trigger to open
gun and release pressure.
Remove garden hose fitting at the inlet side of the pump, depress
inlet valve stem to make sure it is free, inspect washer to make sure it
is seated and in good condition. Re-attach garden hose fitting making
sure that it is hand tight. Start engine and repeat first steps for
operation.

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
SPRAY TIP CLEANING DURING USE
1. Place the Spray Control Knob in the re-
circulating position to release pressure.
2. Turn spray tip arrow on spray gun so that the
arrow points toward the gun.
3. Turn spray control knob to spray position and
trigger gun. This should clear the gun. Turn
spray control knob to prime position and trigger
gun to release pressure.
4. Reverse the tip so the spray tip arrow on the
spray gun points towards the ground.
5. Turn the spray control knob to spray and
resume spraying. If the spray gun is still clogged,
proceed to cleaning procedures below.
CLEANING PROCEDURE
1. Remove pail with paint.
2. Place empty pail on machine and fill with 2
gallons of water so that suction filter is covered.
3. Place return hose in waste container
4. Make sure Spray Control Knob is in the
re-circulating position.
5. Start engine and let engine run in prime
position until fluid in re-circulating hose runs
clear.
6. Turn Spray Control Knob to Spray Position.
7. Trigger gun until gun spray runs clear.
8. Turn spray control knob to prime position, turn
off engine and trigger spray gun to release
pressure.
9. Wipe down suction tube and re-circulating
hose.
10. Clean spray tip if needed with a nylon bristle
brush. DO NOT USE METAL BRUSHES
PRECAUTIONARY WARNING!
ALWAYS release pressure in the system before changing or cleaning
the spray tip. (Place the Spray Control Knob in the re-circulating
position, turn off sprayer and squeeze spray trigger to release
pressure)
NEVER use fuels to clean the equipment
DO NOT use solvents containing halogenated hydrocarbons such as
methyl bromine, carbon tetrachloride and ethyl iodine
DO NOT attempt to clean a clogged gun filter. You must replace it.
DO NOT use brushes with metal bristles or any metal object to clean
the spray tip of dried paint. Replace the tip if it cannot be cleaned.

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
CLEANING PROCEDURE FOR EXTENDED PERIODS OF NON-USE
1. Clean as instructed in cleaning procedure.
2. Pick up suction filter and hold with bottom
facing up.
3. Pour 2 ounces of pump protector into suction
filter so there is approximately 2 inches of fluid
showing in inlet hose.
4. Leave engine off and pull recoil start until you
see fluid in return hose.
5. Unit may now be stored with fluid remaining
inside hose and pump.
CLEANING PROCEDURE FOR WINTER (FREEZING) STORAGE
1. Clean as instructed in cleaning procedure and
then place ½ bottle of pump protector in pail.
2. Place spray knob in prime position and run
pump until pump protector is seen flowing from
return hose.
3. Turn spray knob to spray position and trigger
gun until pump protector sprays from gun.
4. Turn spray control knob to prime position, turn
off pump and trigger spray gun to release
pressure.
5. Remove as much fuel from the engine gas tank
as you can.
6. Run engine until it runs out of gas.
7. Turn Spray knob to prime position.
8. Disconnect paint hose from pump and gun
then, drain hose.
9. Unit may now be stored in freezing
temperatures.
10. Drain and change engine oil in the spring.
MAINTENANCE
ITEM
CHECK
MAINTENANCE ACTION
Engine Oil
Before each use
Change oil after first 20 hours of
operation and then, every 100 hours
Spark Plug & Air Filter
Every 4 Months
Clean or change as needed
Wheels
Lubricate weekly
Grease with high quality axle
lubricant
Spray Gun Clamp and Cable
Check Weekly
Spray with silicone spray
Spray Gun Filter
Check Monthly
Replace if filter becomes clogged
Spray Pump
Before and after each use
Use pump protector if the unit will
not be used for more than one day
Suction Filter
Before each use
Replace as needed or when clogged
Suction Tube
Before each use
Replace if needed or has cuts
Bypass (re-circ) hose
Before each use
Replace if needed or has cuts
Spray Hoses
Before each use
Replace if needed or has cuts
Spray Tip
Before each use
Replace if spray pattern is uneven
Outlet Push Button
Before each use
Replace every 1000-1500 gallons or if
leaking
Outlet Valve
If pump does not prime
Replace every 500-1000 gallons
Inlet Valve
If pump does not prime
Every 500-1000 gallons
Prime/Spray Valve
If pump will not toggle between
Prime/Spray
Every 1000-1500 gallons or if it stops
working

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
PARTS LIST
Item Part Item Part
Number Description Number Number Description Number
#1 Paint hose, 25’ with fittings 10000458
#2 Spray gun, airless 10005114
#3 Spray gun star knob 10003943
#4 Round Base Nut 10003942
#5 Spray gun support arm 10003950
#6 Spray gun mounting bracket 10004579
#7 Spray gun mounting bracket 10004580
bellcrank
#8 Spray gun Filter (Package of 2) 10000641
#9 Spray tip, 517 reversible tip 10000508
(2”-4” wide lines)
#10 Cable Adjuster 10000018
#11 Hand Grips, (2 required) 10004281
#12 Dual Handle 10003949
#13 Left & Right Handle Braces 10004570
#14 Chassis 10003948
#15 Belt Guard 10003957
#16 Belt, AX25 10003940
#17 Star Knob 10000007
#18 Trigger, operating spray 10002951
#19 Operating Cable 10000820
#20 Pulley, engine 10003941
#21 Pulley, pump drive 10000708
#22 Wheels, 10” pneumatic 10000012
ENGINE LUBRICANT AND PARTS
ITEM
SPECIFICATIONS
Engine
Briggs & Stratton 550EX Series
10004608
Oil Capacity
16 ounces SAE 10W30
Spark Plug
Champion RC12YC
Air Filter
Briggs & Stratton 593260
Spray operating
trigger #18
Paint hose 25’ #1
Belt (AX25) #16
Spray Gun star
knob #3
Pump Drive
Pulley #21
Spray Tip #9
Engine Pulley #20
Pic 5
Pic 6
Pic 7
Operating
Cable #19
Spray Gun Star
Knob #3

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
AIRLESS PUMP PARTS
Item Part Item
Number Description Number Number Description Number
#23** Inlet Valve 10000694
#24** Outlet Valve 10000694
** Both #22 and 23 available in kit #10000694 only
#25 Diaphragm Kit 10004135
#26 Spray pump, airless 10003945
#27 Prime/spray control Valve 10004000
#28 Pressure Control knob N/A
#29 Outlet Push button 10000806
#30 Suction hose filter 10001760
#31 Suction hose sleeve 10003932
#32 Suction Hose 10003959
#33 By-Pass hose (re-circulating) 10003960
#34 Suction hose washer (pkg of 5) 10000711
#35 Snap on lid for Airless 10003964
#36 5 Gallon Pail 10002838
#37 5-gallon pail Strainer (pkg of 5) 10003569
AIRLESS PUMP DETAIL
NEVER REMOVE FRONT COVER, PRESSERE ADJUSTING VALVE OR THE PUMP HEAD BLOCK.
THIS WILL VOID THE WARRANTY.
CALL THE FACTORY FOR SERVICE LOCATIONS IF THESE ITEMS REQUIRE SERVICE.
ITEM
CHECK
*REPLACE
Spray tips
517 2”-6” Pavement
619 2”-6” Turf
Before each use
Every 75-500 gallons
Or when line quality becomes
poor
Suction filter
10001760
Before each use
If filter becomes clogged.
Gun filter
10000641
Every 25 gallons or if gun does
not spray
REPLACE ONLY DO NOT CLEAN
every 50-250 gallons
Outlet push button
10000806
Before each use
Every 1000-1500 gallons or if
leaking
*Inlet valve
If pump does not prime
check washer at same time
Every 500-1000 gallons.
Washer- Every 50-250 gallons
*Outlet valve
If pump does not prime
*Inlet/Outlet valve kit 10000694
Every 500-1000 gallons
Prime/Spray Valve
10004000
Only if it stops working
Every 1000-1500 gallons
or if it stops working
Suction tube
Before each use
Check for nicks and cuts
Bypass tube
Before each use
Check for nicks and cuts
Prime/spray
Control #27
Outlet Valve #24
Front Cover
NEVER REMOVE
Pump Head block
NEVER REMOVE
Pressure adjusting Valve
NEVER REMOVE
Inlet valve #23
Bypass/Return
hose #33
Pic 8
Pic 9

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.0816
TROUBLESHOOTING GUIDE
PROBLEM
REMEDY
Engine will not start
Check that the fuel shutoff and ignition switch are in the on position, choke
lever is in Choke position and throttle lever is in run position. Fuel tank has
adequate new fuel. Call factory for assistance.
Engine starts, but runs rough
Check that the choke is turned off.
Choke off but still runs rough
Check for proper fuel. Check spark plug for fouling. Clean or replace. Check
air filter. Call factory if operation is still unsatisfactory.
Pump will not prime
(No fluid returning to pail)
Check that spray control knob is in Prime position (Circular arrows aligned
with arrow on housing). Push brass outlet valve button 3 times.
Outlet Valve Button pushed, but will still
not prime
Turn off pump, turn pressure control knob out (counter-clockwise) several
turns until loosens. Turn on pump and run for 60 seconds. Turn pressure
control knob all the way in. Pump should now prime. Call factory for
assistance.
Fluid is returning to pail in bypass hose,
but air bubbles are still present in hose
after 60 seconds
Check inlet hose fitting for tightness and worn or missing rubber washer.
Check suction hose for nicks or cuts. Call factory for assistance.
Pump primes, but gun does not spray
Check spray control knob is in spray position. Check pressure control knob
is turned to high pressure (clockwise), until it stops. Do Not Force. Check
suction filter is below liquid level. Press brass outlet valve button three
times. Make sure spray tip is not obstructed.
Knobs are set correctly, still does not
spray
Check that trigger lock on spray gun is turned to operating position (wings
parallel to gun body). Check spray tip arrow is pointing towards ground
Check that handle trigger is operating spray gun.
All of above correct, gun will still not
spray
Turn spray control knob to prime position, turn off engine, pull trigger to
release pressure. Check spray gun filter, replace if plugged. Call factory for
assistance.
Over spray or too much paint
Lower spray pressure. Turn spray pressure control knob counter- clockwise
several turns, then increase pressure until desired spray pattern is even.
Too little paint
Increase spray pressure. Paint may need to be thinned in cooler
temperatures and if paint viscosity is very thick.
Uneven spray pattern or stringing
Increase spray pressure. Spray tip may be chipped or clogged. Reverse tip
to clear obstruction and clean if necessary.
Pressure increased, tip is clean, spray
still not correct
Worn tip. Replace tip. Call factory for assistance.
Please call us! If you have any questions during setup, painting or cleaning.
Your machine is designed to be simple and safe to operate: 1-800-624-6706

4250 Airless Sprayer™
ALWAYS wear safety goggles or protective eye-wear when operating the unit!
4250™ Manual / 3947.1015
THE NEWSTRIPE WARRANTY –18 MONTH
NEWSTRIPE, INC., WARRANTS TO THE ORIGINAL PURCHASER, FOR 18 (EIGHTEEN) MONTHS AFTER DATE OF PURCHASE,
THAT THE EQUIPMENT* HEREBY SOLD SHALL BE FREE OF DEFECTS IN MATERIALS AND WORKMANSHIP. THIS
WARRANTY DOES NOT EXTEND TO ANY DAMAGE OR MALFUNCTION RESULTING FROM MISUSE, NEGLECT, ACCIDENT,
IMPROPER OPERATION, OR NORMAL WEAR AND TEAR.
Damage incurred in shipment from Newstripe, Inc. to the customer is the total responsibility of the carrier. The
CUSTOMER MUST NOTE DAMAGES on the Bill of Lading of Trucking Company or Railroad; and Newstripe, Inc. will
furnish to the customer the cost or parts and labor. The customer can then bill the common carrier for the damages by
placing his signature on the documents.
The Newstripe, Inc. obligation under this warranty and any implied warranties is limited to replacement or repair of
defective parts of its manufacture without charge for 18 (EIGHTEEN) months from date of purchase. For service under
this warranty, buyer shall ship the defective part or parts of the equipment, transportation prepaid, to Newstripe, Inc.
together with a written description of any claimed defect and proof of purchase date of the materials being returned.
Prior to retuning any part or machine, the CUSTOMER must obtain a Return Materials Authorization number. Call 1-
800-624-6706. To review the complete guidelines for warranty and returns, please visit www.newstripe.com/terms-
of-use-privacy-policy.
*Components not manufactured by Newstripe, Inc. such as engines, compressors, pumps, and transaxles are
furnished with their respective manufacturer’s warranties only. Where Newstripe elects to extend manufacturers’
warranties, the warranty shall cover up to 100% of the cost to repair or replace materials and parts for the first 12
months of ownership, excluding labor. Extension of any manufacturers’ warranty for these components is at the sole
discretion of Newstripe, Inc. and does not include wearable parts and consumable components from normal wear and
tear.
The responsibilities described above are the only responsibilities of Newstripe, Inc. under this written warranty or any
implied warranty, and may be exercised only within 18 (EIGHTEEN) months from the date of purchase. In no event shall
Newstripe, Inc. be liable for incidental or consequential damages and no person had any authority to bind it to any
representation or warranty, not be responsible for work done, materials furnished or repairs made by others without its'
specific written authorization.
THIS WARRANTY SHALL BE IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND THERE IS NO OTHER
REPRESENTATION OR WARRANTY OF ANY KIND WITH RESPECT TO THE GOODS SOLD HEREBY EXCEPT AS SET FORTH
HEREIN. IT IS EXPRESSLY AGREED THAT THIS WARRANTY SHALL BE LIMITED TO THE ADJUSTMENT, REPAIR OR
REPLACEMENT OF PARTS AND THE LABOR AND SERVICES REQUIRED THEREBY. IN NO EVENT, INCLUDING ANY CLAIM
FOR NEGLIGENCE, SHALL NEWSTRIPE, INC. BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Sincerely,
Newstripe, Inc