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4 HP Pressure wasHer Model 98439 set uP, OPerating, and servicing instructiOns danger using an engine indoors can KiLL YOu in Minutes. engine exhaust contains carbon monoxide. this is a poison you cannot see or smell. never use inside Only use Outside...
Set up and use only on a flat, level, hazardous situation which, if well-ventilated surface. not avoided, could result in minor or moderate injury. SKU 98439 For technical questions, please call 1-800-444-3353. Page 3...
Electromagnetic fields in close proximity to a heart pacemaker could cause pacemaker interference or pacemaker failure. Caution is neces- sary when near the engine’s magneto or recoil starter. SKU 98439 For technical questions, please call 1-800-444-3353. Page 4...
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Do not cover the engine or equipment may affect the equipment’s operation. during operation. if damaged, have the equipment serviced before use. Many ac- SKU 98439 For technical questions, please call 1-800-444-3353. Page 5...
This tool vibrates during use. Re- peated or long-term exposure to service PrecautiOns vibration may cause temporary or permanent physical injury, particularly before service, maintenance, or to the hands, arms and shoulders. To cleaning: SKU 98439 For technical questions, please call 1-800-444-3353. Page 6...
If water is leaking out of the Pressure Washer immediately turn off the unit. Unplug the Pressure Washer, and discharge all pressure before tighten- SKU 98439 For technical questions, please call 1-800-444-3353. Page 7...
Assembly Diagram near that the item is intact and undamaged. If the end of this manual. any parts are missing or broken, please call Harbor Freight Tools at the number SKU 98439 For technical questions, please call 1-800-444-3353. Page 8...
Your Warranty is VOID if the engine’s crankcase is not properly filled with oil before each use. Before each use, check the oil level. Do not run the engine with low or no engine SKU 98439 For technical questions, please call 1-800-444-3353. Page 9...
Then replace the Fuel Filler Cap. “OPEN” position. note: Carburetor (80B). Never adjust the black screw in an attempt to adjust the idle speed. Never adjust the cop- per screw (Carburetor Exhaust), lo- SKU 98439 For technical questions, please call 1-800-444-3353. Page 11...
Also, make will release hot water. take sure the Fuel Tank is filled with un- precautions to not get burned leaded gasoline. from the hot water. SKU 98439 For technical questions, please call 1-800-444-3353. Page 12...
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Drain all water out of the unit, clean external parts with clean cloth, then store the equipment out of children’s reach according to the storage in- structions in this manual. SKU 98439 For technical questions, please call 1-800-444-3353. Page 13...
In a well-ventilated corrected before further use. area away from bystanders, use pressurized air to blow dust out of the air filter. SKU 98439 For technical questions, please call 1-800-444-3353. Page 14...
It may take a little longer about 1/16 turn more. than usual to start the engine be- SKU 98439 For technical questions, please call 1-800-444-3353. Page 15...
25, 50, and 100 operation to all metal parts. hours should be performed at least Cover and store in a dry, well-ventilat- yearly. ed area out of reach of children. SKU 98439 For technical questions, please call 1-800-444-3353. Page 16...
Engine valves or tappets Adjust valve clearance. If that does misadjusted or stuck. not work, clean or replace valves/ tappets. Follow all safety precautions whenever diagnosing or servicing the equipment or engine. SKU 98439 For technical questions, please call 1-800-444-3353. Page 18...
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Check water supply hose for kinks, leaks, or blockage. Not enough water supply. Open water faucet all the way. Follow all safety precautions whenever diagnosing or servicing the equipment or engine. SKU 98439 For technical questions, please call 1-800-444-3353. Page 19...
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BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO. SKU 98439 For technical questions, please call 1-800-444-3353. Page 20...
If product has no serial number, record month and year of purchase instead. note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. SKU 98439 For technical questions, please call 1-800-444-3353. Page 21...
Rod Set Pump Body U-packing O-ring U-packing O-ring Valve Jacket When ordering replacement parts from this list, the “A” suffix must be included in order to get the correct part. SKU 98439 For technical questions, please call 1-800-444-3353. Page 23...
PuMP diagraM When ordering replacement parts from this list, the “A” suffix must be included in order to get the correct part. SKU 98439 For technical questions, please call 1-800-444-3353. Page 24...
When ordering replacement parts from this list, the “B” suffix must be included in order to get the correct part. note: Some parts are listed and shown for illustration purposes only, and are not available individually as replace- ment parts. SKU 98439 For technical questions, please call 1-800-444-3353. Page 25...
When ordering replacement parts from this list, the “B” suffix must be included in order to get the correct part. SKU 98439 For technical questions, please call 1-800-444-3353. Page 26...
If any emission related part on your engine is defective, the we will either repair or replace the product part will be repaired or replaced by HFT. at our election or we may elect to refund SKU 98439 For technical questions, please call 1-800-444-3353. Page 27...
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Owner’s Manual Improper or inadequate maintenance of any warranted parts Repairs performed outside of the authorized warranty service dealers Alterations by changing, adding to or removing parts from the engine. SKU 98439 For technical questions, please call 1-800-444-3353. Page 28...
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