ProblemProbable CauseSolution Engine Will Not Start (See Engine Manual for further engine trouble shooting) No FuelAdd Fuel No Or Low OilAdd Oil Engine On/Off Switch in Off PositionPlace switch in on position Pressure builds up after two pulls on the recoil starter or after initial useSqueeze gun trigger to relieve pressure Fuel valve closedMove valve to open position Choke lever in the no choke positionMove lever to the choke position Choke lever in the choke position on a hot engine or an engine that has been exposed to thermal heat for a long period of timeMove choke to the no choke position No Water Flow Plugged nozzleClean nozzle with cleaning tool Stuck inlet valvesClean or replace valves Un-loaded cloggedClean, rebuild or replace un-loaded Troubleshooting Guide

ProblemProbable CauseSolution No or low pressure (Initial Use) Low water supply Water supply must be at least 5 20 PSI Leak at high pressure hose fittingsRepair leak Air leak in inlet fittingsTighten fittings Nozzle obstructedClean nozzle Water filter screen cloggedRemove and clean filter High pressure hose too long Use high pressure hose under 100 feet. Lengthen water supply hose instead of high pressure hose. Defective E-Z start valve if equippedReplace E-Z start valve No or low pressure (After normal use) Chemical build up in chemical injectorRebuild or replace chemical injector Worn or obstructed valvesReplace valves Worn un-loaded pistonReplace piston and seat or un-loaded Defective E-Z start valve if equippedReplace E-Z start valve Troubleshooting Guide

ProblemProbable CauseSolution Will not draw chemicals Spray wand has wrong nozzleUse black soap nozzle Chemical filter cloggedClean filter Chemical screen not in cleaning solution Make sure end of chemical hose is fully submerged into cleaning solution Chemical to thick Dilute chemical. Chemical should be the same consistency of water Chemical build up in chemical injectorRebuild or replace chemical injector High pressure hose to long Use high pressure hose under 100 feet. Lengthen water supply hose instead of high pressure hose. Water leaking at gun/wand connection Loose connectionsTighten connections Worn or broken O-ringReplace O-ring Water leaking at pump Loose connectionsTighten connections Worn or broken O-ringReplace O-ring Worn piston packing or sealsReplace piston packing or seals Pump damaged from freezingRebuild or replace pump Troubleshooting Guide

ProblemProbable CauseSolution Water in crankcase Worn piston packing or sealsReplace piston packing or seals Humid air condensing into water inside the crankcase Change oil intervals. Use DeWalt DP70 oil or non-detergent SAE 30 weight oil Oil leaking at pump Worn oil sealsReplace oil seals Loose drain plugTighten drain plug Worn drain plug O-ringReplace O-ring Worn fill plug O-ringReplace O-ring Vent plug is cloggedClean or replace vent plug Pump is overfilledCheck manual for correct amount Incorrect oil used Drain and fill with DeWalt DP70 oil or non-detergent SAE 30 weight oil Pulsation Valve stuck openClean or replace valves Nozzle obstructedClean nozzle with cleaning tool Troubleshooting Guide