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 sound Piston, 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 combustion Engine is too hot Better ventilation
Too much carbon deposit in combustion chamber Clear away
Improper gasoline brand or low gasoline quality Replace with qualified gasoline
Spark lacking There is water in float chamber Clean
improper spark plug electrodes clearance Adjust
Something wrong with ignition coil, and so on Check and replace damaged parts

Subaru PowerStroke Pressure Washers Troubleshooting

Unable igniting Fuel is finished Refill fuel
Carburetor is clogged Check fuel line and dredge
Float is leaking Repair
Needle valve is sticked Dismantle float chamber and clean or replace needle valve.
Spark plug is punctured, or short-circuited by carbon deposit Replace spark plug
Side electrode of spark plug is dropped out Replace spark plug
High-tension wire is dropped out Weld on
Ignition coil is punctured or short-circuited Replace ignition coil
Stop wire is located on engine body Find out meeting and insulate
Cylinder is seriously scored and valve dropped out Repair or replace damaged parts
Abnormal oil volume or inferior oil Check the oil level and quality
Exhaust pipe blocked up Clean exhaust pipe
Shroud leaking Repair damaged part
Cooling fins blocked by foreign matter Clear cooling fins
Gasoline engine overheat Cooling fan is loosen and misfunctioned Reinstall well
Connection rod deformation to make piston and cylinder bushing side wear Replace connection rod
Cylinder or piston or piston ring is worn Replace the worn parts
Improper adjustment of engine governor to cause high speed. Readjust engine governor
Crankshaft main bearing burnt out Replace main bearing
Beating sound Piston, piston ring or cylinder is worn Replace the worn part
Connection rod or piston pin and piston pin hole are worn
Crankshaft main neck is worn Replace bearing
Piston ring is broken Replace piston ring
Metal beating sound when abnormal combustion occurs Too much carbon deposit in combusting chamber Clear away carbon deposit
Too small electrode clearance of spark plug Adjust electrode clearance properly
Engine fuel is too much Check relative parts such as carburetor
The other Improper fuel brand Replace fuel
Engine is overheat Find a cause and eliminate it
Improper valve clearance Readjust valve clearance properly
Fly wheel is not connected with crankshaft tightly Connect tightly

Subaru 3100 PSI Pressure Washers Troubleshooting

Problem Solution
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 start No fuel in tank Fill tank
Water pressure in hose Squeeze trigger to relieve water pressure Replace spark plug Replace spark plug
Spark plug shorted or fouled Replace 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 start Water in gasoline Weak spark at spark plug Drain entire system and refill with fresh fuel Contact a qualified service center
Engine lacks power Dirty air filter Clean or replace air filter
Electric Start feature not working Battery is not charged Battery wires disconnected Charge the battery using the battery maintainer charger Connect the battery wires.
Detergent fails to mix with spray Soap tank is empty Add detergent to soap tank
High pressure nozzle attached Use blue soap nozzle to apply detergent
Pump doesn’t produce pressure Low pressure nozzle installed Inadequate water supply Trigger handle or spray wand leaks Replace 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 line Pull trigger on trigger handle to remove air from line
Hose is leaking Kink in hose Replace hose
Choke in START position Pump is faulty Eliminate kinks in hose
Push choke in to the RUN position.
Contact a qualified service center
Machine doesn’t reach high pressure Diameter of garden hose is too small Water supply is restricted Replace with 3/4 in. garden hose
Not enough inlet water Wrong nozzle is attached Check garden hose for kinks, leaks, and blockages
Open water source full force Attach the high pressure nozzle