Engine won’t start – SOLUTION
| Engine switch is in ‘OFF’ Position | Set throttle to ‘RUN’ position. |
| Pressure build-up after pulling cord | Depress the trigger gun while you try to start it. |
| Carburetor not primed | Prime carburetor. |
| Carburetor jets clogged | Bring to shop for carb cleaning in an ultrasonic cleaner. |
Won’t draw chemical
| Nozzle not in chemical draw position | Set nozzle to chemical. |
| Chemical screen is obstructed | Check chemical screen, clear obstruction. |
| Trying to draw chemical with a h.p. nozzle inserted | Switch to the black chemical/low pressure nozzle. |
| Injector orifice obstructed/stuck | Check & clean. Poke paper clip down into chem nipple. |
Pump running normally, but pressure doesn’t achieve rated values
| Water supply restricted | Check water supply & filter screen for blockage, kinks, leaks, etc. |
| Nozzle is in low PSI position (if applicable) | Set nozzle to the high-pressure position. |
| Nozzle too large or worn | Check & replace. |
| Pump sucking air | Check that hoses & fittings are airtight. |
| Nozzle blocked | Clean nozzle. |
Fluctuating Pressure
| Pump sucking air | Check that hoses & fittings are airtight. Purge air from garden hose. |
| Garden hose inlet strainer clogged | Clean & check filter frequently. |
| Worn seals or packing | Check and replace. |
| Inadequate water supply | Check flow available to pump. |
| Fouled or dirty inlet or discharge valves | Clean inlet & discharge valve assemblies. Replace if damaged. |
Pressure is low
| Nozzle is clogged or partially obstructed | Clean or replace. |
| Nozzle worn | Check & replace. |
| Valves worn, dirty or stuck | Check, clean or replace. |
| Worn piston packing | Check and replace. |
| Inadequate water supply to unit | Shorten supply hose or get one with larger diameter. |
| Leaky discharge hose | Check o-rings on q.c. & hose itself. Replace if cracked or punctured. |
Pump noisy
| Water supply inadequate | Shorten supply hose or get one with larger diameter. |
| Pump sucking air | Check that hoses & fittings are airtight. |
| Debris in valves or valves worn | Check, clean or replace. |
| Worn bearings | Replace pump. |
Presence of water in oil (milky), Water dripping from pump
| High Humidity | Change oil. |
| Piston packing & oil seal worn | Check & replace oil seals. |
Water dripping from pump
| Fittings loose | Tighten fittings. |
| O-rings or piston guide retainer worn | Check & replace. |
| Piston packings worn | Check and replace. |
Oil Dripping
| Oil seal worn | Check and replace. |
| Loose drain plug or worn o-ring | Tighten drain plug or replace o-ring. Do not over torque. |