4 hp pressure washer model 98444 set up, operating, and servicing instructions 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 a home or garage, even if doors and windows are open. Only use outside a...
Page 2 sku 98444 for technical questions, please call 1-800-444-3353. Contents important safety information ............................ 3 set up precautions ....................3 operating precautions ............4 vibration hazard: ..................6 service precautions ............. 6 refueling:...
Page 3 sku 98444 for technical questions, please call 1-800-444-3353. Save this manual keep this manual for the safety warn- ings and precautions, assembly, operat- ing, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly dia...
Page 4 sku 98444 for technical questions, please call 1-800-444-3353. The work area should have adequate 5. Drainage to reduce the possibility of a fall due to slippery surfaces. Wear ansi-approved safety goggles, 6. Heavy-duty work gloves, and dust mask/respirator during set up and use. Use only oi...
Page 5 sku 98444 for technical questions, please call 1-800-444-3353. Use only accessories that are recom- 6. Mended by harbor freight tools for your model. Accessories that may be suitable for one piece of equipment may become hazardous when used on another piece of equipment. Do not operate in exp...
Page 6 sku 98444 for technical questions, please call 1-800-444-3353. Cidents are caused by poorly main- tained equipment. Use the correct equipment for the 23. Application. Do not modify the equip- ment and do not use the equipment for a purpose for which it is not in- tended. The high pressure wat...
Page 7 sku 98444 for technical questions, please call 1-800-444-3353. Turn the engine switch to its a. “off” position. Allow the engine to completely cool. B. Then, remove the spark plug c. Wire(s) from the spark plug(s). Keep all safety guards in place and in 2. Proper working order. Safety guards ...
Page 8 sku 98444 for technical questions, please call 1-800-444-3353. Basic specifications fuel type 86+ octane unleaded gasoline capacity 0.55 gallons engine oil type sae 10w-30 above 32° f 5w-30 at 32° f or below capacity 0.63 quarts pump oil sae 75w-90 non- detergent engine speed for pressure was...
Page 9 sku 98444 for technical questions, please call 1-800-444-3353. Attach the hose (7) to the hose con- 5. Nection on the unit. (see picture on the next page.) screw the gun (27) onto the hose. 6. Choose the right nozzle (2) for the 7. Job. Pull back the quick connect col- lar and push the nozzle...
Page 10 sku 98444 for technical questions, please call 1-800-444-3353. Engine diagram.
Page 11 sku 98444 for technical questions, please call 1-800-444-3353. The top lip. Oil type: 32° f or above = sae 10w-30 below 32° f = sae 5w-30. Replace the oil filler cap. 4. Caution! Do not run the engine with too little or too much oil. The engine will be permanently damaged. Checking fuel leve...
Page 12 sku 98444 for technical questions, please call 1-800-444-3353. The operational break-in period will 2. Last about 3 hours of use. During this period: do not apply a heavy load to the • equipment. Do not operate the engine at its • maximum speed. The maintenance break-in period will 3. Last a...
Page 13 sku 98444 for technical questions, please call 1-800-444-3353. Squeezing the trigger, and change to a lower pressure nozzle. Hold the gun at about a 45° angle 8. When cleaning; spraying the surface directly could embed dirt into the surface (especially with the high pres- sure nozzles). Spra...
Page 14 sku 98444 for technical questions, please call 1-800-444-3353. Technical specifications engine type single cylinder 4 stroke ohv bore x stroke 2.4” x 1.7” displacement 118cc compression ratio 8.5:1 rotation viewed from pto (power takeoff - the output shaft) counterclockwise fuel type 86+ oct...
Page 15 sku 98444 for technical questions, please call 1-800-444-3353. If this does not get the filter reason- ably clean, replace it. For foam filter elements: b. Wash the element in warm water and mild detergent several times. Rinse. Squeeze out excess water and allow it to dry completely. Soak th...
Page 16 sku 98444 for technical questions, please call 1-800-444-3353. Cause the fuel needs to refill the fuel line and new filter. Cleaning, maintenance, and lubrication schedule note: this maintenance schedule is intended solely as a general guide. If performance decreases or if equip- ment operat...
Page 17 sku 98444 for technical questions, please call 1-800-444-3353. Before starting the engine after stor- 5. Age, keep in mind that untreated gas- oline will deteriorate quickly. Drain the fuel tank and change to fresh fuel if untreated gasoline has been sitting for a month, if treated gasoline ...
Page 18 sku 98444 for technical questions, please call 1-800-444-3353. Troubleshooting problem possible causes probable solutions engine will not start fuel related: no fuel in tank or fuel valve closed. 1. Choke not in start position, 2. Especially with cold engine. Low quality or deteriorated, old...
Page 19 sku 98444 for technical questions, please call 1-800-444-3353. Troubleshooting problem possible causes probable solutions engine misfires spark plug wire loose. 1. Incorrect spark plug gap or 2. Damaged spark plug. Defective spark plug wire. 3. Old or low quality gasoline. 4. Incorrect compr...
Page 20 sku 98444 for technical questions, please call 1-800-444-3353. Troubleshooting problem possible causes probable solutions output pressure varies not enough water supply. 1. Water inlet screen is clogged. 2. Nozzle is clogged. 3. Nozzle has mineral build up. 4. Check water supply hose for kin...
Page 21 sku 98444 for technical questions, please call 1-800-444-3353. General parts list part description qty 1 handle 1 2 nozzle 4 3 nozzle grommet 4 4 cross bolt 4 5 locknut 4 6 gasket 8 7 hose 1 8 engine 1 9 pump 1 10 thermal relief cap 1 11 inlet connection 1 12 wheel shaft 2 13 wheel 2 14 plug...
Page 22 sku 98444 for technical questions, please call 1-800-444-3353. General assembly diagram 39.
Page 23 sku 98444 for technical questions, please call 1-800-444-3353. Pump parts list part description qty 1a cap 4 2a o-ring 4 3a check valve support 3 4a check valve spring 6 5a check valve stem 3 6a check valve box 3 7a o-ring 6 8a cover board 1 9a seal bolt 1 10a bolt 4 11a spring gasket 4 12a ...
Page 24 sku 98444 for technical questions, please call 1-800-444-3353. Pump diagram when ordering replacement parts from this list, the “a” suffix must be included in order to get the correct part..
Page 25 sku 98444 for technical questions, please call 1-800-444-3353. Engine parts list part description qty 1b flange bolt m6x12 4 2b head cover 1 3b head cover packing 1 4b breather tube 1 5b locknut 2 6b adjusting nut 2 7b rocker arm 2 8b rocker bolt m8 2 9b exhaust valve 1 10b exhaust valve spr...
Page 26 sku 98444 for technical questions, please call 1-800-444-3353. Engine diagram when ordering replacement parts from this list, the “b” suffix must be included in order to get the correct part. 84.
Page 27 sku 98444 for technical questions, please call 1-800-444-3353. 90 day warranty harbor freight tools co. Makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and wo...
Page 28 sku 98444 for technical questions, please call 1-800-444-3353. Harbor freight tools emission control defects warranty provisions 1. Length of coverage hft warrants to a first retail purchaser and each subsequent purchaser that the engine is free from defects in materials and workmanship that...
