Subaru Pressure Washers Troubleshooting

Need to understand what’s wrong with your Subaru pressure washer? Then you’ve come to the right place. Below, you’ll discover troubleshooting tips for a variety of Subaru pressure washers. Next to each symptom, there’s an explanation of what you need to do to resolve the problem. Make sure you refer to the right table (for your model).

Subaru EA190V Pressure Washers Troubleshooting

Knocking soundPiston, cylinder or piston ring is worn excessively.Replace the worn parts
Piston pin and piston pin hole are worn excessively.Replace piston or piston pin
Connecting rod small head is worn excessively.Replace tie rod
Bearing for crankshaft main shaft is worn.Replace roller bearing
Abnormal combustionEngine is too hotBetter ventilation
Too much carbon deposit in combustion chamberClear away
Improper gasoline brand or low gasoline qualityReplace with qualified gasoline
Spark lackingThere is water in float chamberClean
improper spark plug electrodes clearanceAdjust
Something wrong with ignition coil, and so onCheck and replace damaged parts

Subaru PowerStroke Pressure Washers Troubleshooting

Unable ignitingFuel is finishedRefill fuel
Carburetor is cloggedCheck fuel line and dredge
Float is leakingRepair
Needle valve is stickedDismantle float chamber and clean or replace needle valve.
Spark plug is punctured, or short-circuited by carbon depositReplace spark plug
Side electrode of spark plug is dropped outReplace spark plug
High-tension wire is dropped outWeld on
Ignition coil is punctured or short-circuitedReplace ignition coil
Stop wire is located on engine bodyFind out meeting and insulate
Cylinder is seriously scored and valve dropped outRepair or replace damaged parts
Abnormal oil volume or inferior oilCheck the oil level and quality
Exhaust pipe blocked upClean exhaust pipe
Shroud leakingRepair damaged part
Cooling fins blocked by foreign matterClear cooling fins
Gasoline engine overheatCooling fan is loosen and misfunctionedReinstall well
Connection rod deformation to make piston and cylinder bushing side wearReplace connection rod
Cylinder or piston or piston ring is wornReplace the worn parts
Improper adjustment of engine governor to cause high speed.Readjust engine governor
Crankshaft main bearing burnt outReplace main bearing
Beating soundPiston, piston ring or cylinder is wornReplace the worn part
Connection rod or piston pin and piston pin hole are worn
Crankshaft main neck is wornReplace bearing
Piston ring is brokenReplace piston ring
Metal beating sound when abnormal combustion occursToo much carbon deposit in combusting chamberClear away carbon deposit
Too small electrode clearance of spark plugAdjust electrode clearance properly
Engine fuel is too muchCheck relative parts such as carburetor
The otherImproper fuel brandReplace fuel
Engine is overheatFind a cause and eliminate it
Improper valve clearanceReadjust valve clearance properly
Fly wheel is not connected with crankshaft tightlyConnect tightly

Subaru 3100 PSI Pressure Washers Troubleshooting

Is the engine running at full speed?Move the throttle control to the FAST.
Is the low pressure nozzle connected to the wand?Switch to a high pressure nozzle.
Is the water inlet or filter screen blocked, clogged or damaged?Disconnect the garden hose from the water inlet; clean the water inlet and filter screen. If screen is damaged, remove damaged screen, insert new screen.
Is the high-pressure hose leaking?Check the O-rings. If damaged, remove old O-ring with a small flathead screwdriver, and replace with new one.
Is the spray gun leaking?Replace the pressure washer spray gun with a new one.
Could the nozzle orifice be obstructed?Shut off the engine; purge air from the pump; remove the orifice from the adjustable nozzle or remove the spray tip from the nozzle extension; clean the orifice or spray tip using the wire tool from the maintenance kit.
Is the supply water temperature over 100° F?Provide a cooler water supply.
Is the supply water pressure and flow rate adequate?Test the supply water using a pressure/flow-rate gauge. If the supply water does not produce a minimum of 20 PSI and 4 GPM (25 PSI and 7 GPM for POWER flow+ models), look for an alternative source that can provide adequate pressure and flow.
Is the pump oil level low?Add oil to the pressure washer pump.
Is the pump faulty?With the high pressure hose removed from the pump, attach the garden hose and turn on water. Water will flow through the pump, now turn on the engine; the water flow should increase in pressure and length from where it exits the pump. If this does not happen there is an internal pump issue. If this does happen then there is likely a clog in one of the attachments; high pressure hose, gun, wand, or nozzle.

Subaru Electric Start Pressure Washers Troubleshooting

Engine fails to startNo fuel in tankFill tank
Water pressure in hoseSqueeze trigger to relieve water pressure Replace spark plug Replace spark plug
Spark plug shorted or fouledReplace lead wire or attach to spark plug Contact a qualified service center
Spark plug is broken (cracked porcelain or electrodes broken)
Ignition lead wire shorted, broken, or disconnected from spark plug Ignition inoperative
Engine hard to startWater in gasoline Weak spark at spark plugDrain entire system and refill with fresh fuel Contact a qualified service center
Engine lacks powerDirty air filterClean or replace air filter
Electric Start feature not workingBattery is not charged Battery wires disconnectedCharge the battery using the battery maintainer charger Connect the battery wires.
Detergent fails to mix with spraySoap tank is emptyAdd detergent to soap tank
High pressure nozzle attachedUse blue soap nozzle to apply detergent
Pump doesn’t produce pressureLow pressure nozzle installed Inadequate water supply Trigger handle or spray wand leaksReplace with high pressure nozzle Provide adequate water flow Check connections and / or replace trigger handle or spray wand Clean nozzle
Nozzle is clogged Air in linePull trigger on trigger handle to remove air from line
Hose is leaking Kink in hoseReplace hose
Choke in START position Pump is faultyEliminate kinks in hose
Push choke in to the RUN position.
Contact a qualified service center
Machine doesn’t reach high pressureDiameter of garden hose is too small Water supply is restrictedReplace with 3/4 in. garden hose
Not enough inlet water Wrong nozzle is attachedCheck garden hose for kinks, leaks, and blockages
Open water source full force Attach the high pressure nozzle