Replacement Part List

ManualsBrandsUnbranded ManualsOutdoor Power EquipmentShark 3500 psi 3.4 GPM Gas Pressure Washer Powered by Honda GX270

9.801-760.0 • Rev. 03/16

PRESSURE WASHER Troubleshooting Guide

TROUBLESHOOTING

For Models: HD3.0/27 GB, HD 3.3/35 GB, HD 4.0/40 GB, HD 4.0/40 GeB

PROBLEM POSSIBLE CAUSE SOLUTION

LOW OPERATING

PRESSURE

Faulty pressure gauge Install new gauge.

Insufﬁ cient water supply

Use larger supply hose; clean ﬁ lter at water

inlet.

Old, worn or incorrect spray nozzle

Match nozzle number to machine and/or

replace with new nozzle.

Belt slippage Tighten or replace; use correct belt.

Plumbing or hose leak

Check plumbing system for leaks. Re-tape

leaks with teﬂ on tape.

Faulty or mis-adjusted unloader

valve

Adjust unloader for proper pressure. Install

repair kit when needed.

Worn packing in pump Install new packing kit.

Fouled or dirty inlet or discharge

valves in pump

Clean inlet and discharge valves.

Worn inlet or discharge valves Replace with valve kit.

Obstruction in spray nozzle Remove obstruction.

Leaking pressure control valve Rebuild or replace as needed.

Slow engine RPM Set engine speed at proper speciﬁ cations.

Pump sucking air

Check water supply and possibility of air

seepage.

Valves sticking Check and clean or replace if necessary.

Unloader valve seat faulty Check and replace if necessary.

FLUCTUATING

PRESSURE

Worn or dirty pump valves Call local distributor.

Nozzle is obstructed Blow out or remove debris with ﬁ ne needle.

Pump sucking air, inlet hose

leaking

Check that all hoses and ﬁ ttings are airtight.

Turn off machine and trigger spray gun until

a steady ﬂ ow of water emerges through the

nozzle.

Insufﬁ cient water supply Turn water on full force. Check garden hose

for kinks, leaks or blockage.

PRESSURE LOW

AFTER PERIOD OF

NORMAL USE

Nozzle worn Replace nozzle.

Unloader valve worn Replace unloader valve.

ENGINE WILL NOT

START OR STOPS

WHILE OPERATING

Low oil shutdown Fill engine with oil.

Out of gas Fill fuel tank.

Water in gasoline Drain gas tank; ﬁ ll with clean fuel.

ENGINE IS

OVERLOADED

Nozzle partially blocked Clean nozzle.

Excessive pressure from high

engine RPM

Adjust engine throttle to lower RPM.