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I have a unionpower up-150 pressure washe, and it wont pressurise

Hi, i have a unionpower up-150 pressure washer, the engine runs sweet as a nut, once the water is connected up and the lance is on, and ive got it running, when you pull the trigger it wont pressurise the water coming out, and the engine dose not dip(dont sound like its getting any load) please help, this was a gift thank you in advance!!


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Either your valves are stuck or broken or the seals inside the pump are worn

Posted on Feb 02, 2011

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Try pulling on the end of the wand that may solve your problem

Posted on Jul 20, 2009


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I have unionpower up-150 washer it wpnt start stood for a while

not sure what engine is on this unit but I assume it is a honda engine or copy of on your unit as that looks like a standard engine on this model. If it has been sitting for a while then take the barb off...remove the two nuts on the front holding the carb cover on plus the bolt under the air filter. Pull the carb off the engine and remove the bowl. look for trash and old gas buildup inside the bowl. clean if needed. Remove the plastic float needle in the carb. in the center you will see the can remove the jet with a small flat screwdriver. Take it out carefully so as not to mess it up and clean the holes in the jet thoroughly. Reassemble the carb and replace on the engine. It should start with new gas. Good luck!!!Check here for new parts if needed Pressure washer parts catalog quick links Pressure Washers High Pressure... or FIND PARTS FAST

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I have a unionpower up 150 premium pressure washer theirs a small hose that comes out at the back of the engine with a small filter at the end of the hose pipe I dont no what its for

If the hose actually comes out of the pump (look carefully) it sounds like the chemical pick up line. It would most likely be clear plastic tubing with a plastic filter at the end. You drop this into your chemical (soap, etc) container and under low pressure it will siphon the chemical and apply it through the wand.

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