Black Max electric pressure washer troubleshooting

If the pressure washer is broken, do not rush to call the master. Before looking for breakage, check whether all the parts are correctly assembled, whether the water is switched on, whether the device is connected to electricity? Many causes of malfunctions can be eliminated on your own. The table of troubleshooting shows the most frequent causes of breakages and options for their elimination.

Black Max BM801700 pressure washer troubleshooting

ProblemPossible CauseSolution
Pressure washer does not start when trigger is depressedPower cord not connected to power sourceConnect the power cord to a live 120V AC, 60 Hz AC receptacle.
Switch is offTurn switch on.
GFCI is trippedPress reset button on the GFCI plug.
House/shop circuit breaker is trippedReset house/shop breaker. Make sure pressure washer is connected to an individual branch circuit only. If using an extension cord, make sure it is heavy enough to carry the current of the pressure washer.
Water pressure in hoseSqueeze trigger to relieve water pressure.
Pump doesn’t produce pressureInadequate water supplyProvide adequate water flow.
Spray wand leaksCheck connections and / or replace wand.
Nozzle is cloggedClean nozzle.
Pump is faultyContact authorized service center.
Air in lineSqueeze trigger on spray wand to remove air from line.
Water inlet filter is clogged or dirtyRemove the water inlet filter, rinse with warm water, then replace in unit.
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 Hose is leaking Kink in hoseCheck garden hose for kinks, leaks, and blockages.
Open water source full force.
Replace hose.
Eliminate kinks in hose.
No detergentSoap tank is emptyAdd additional detergent to tank.
Water supply is inadequate or cloggedCheck garden hose for kinks, leaks and blockages.
Wrong nozzle is attachedAttach blue soap nozzle.
Wand leaksO-ring needs replacingReplace o-ring. If this does not correct the problem, contact your authorized service center to purchase a new wand.

Black Max BM80919A pressure washer troubleshooting

PROBLEMCAUSESOLUTION
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 authorized 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 authorized service center
Engine lacks powerDirty air filterClean or replace air filter
Detergent fails to mix with spraySpray selector on the 6-in-1 Change- Over Nozzle is set to either the 40°, 25°, or 0° settingRotate the spray selector on the 6-in-1 Change-Over Nozzle to either the short range detergent or long range deter- gent setting.
Detergent tank is emptyAdd detergent to detergent tank
Pump doesn’t produce pressureSpray selector on the 6-in-1 Change- Over Nozzle is set to either the short range detergent or long range detergent setting.Rotate the spray selector on the 6-in-1 Change-Over Nozzle to either the 40°, 25°, or 0° setting
Inadequate water supplyProvide adequate water flow
Trigger handle or spray wand leaksCheck connections and / or replace trigger handle or spray wand
Nozzle is cloggedClean nozzle
Air in linePull trigger on trigger handle to remove air from line
Hose is leakingReplace hose
Kink in hoseEliminate kinks in hose
Choke in ON (START) positionMove choke to OFF (RUN) position
Pump is faultyContact authorized service center
Machine doesn’t reach high pressureDiameter of garden hose is too smallReplace with 3/4 in. garden hose
Water supply is restrictedCheck garden hose for kinks, leaks, and blockages
Not enough inlet waterOpen water source full force
Spray selector on the 6-in-1 Change- Over Nozzle is set to either the short range detergent or long range detergent setting.Rotate the spray selector on the 6-in-1 Change-Over Nozzle to either the 40°, 25°, or 0° setting