When using my homelite 2700 psi ut80993f its fine sprays great but when let off trigger the moter revs up and down untill the trigger is pulled to spray again is this normal

SOURCE: The engine starts just fine. Everything goes okay

One thing I have found about pressure washers...you need to run water through the hose and everything until you get all the air out...or they will bog down and such until the air is out.

SOURCE: Coleman powermate wont restart spraying after release trigger

Make sure your fluid level in the pump is changed and at the right level.

SOURCE: Once the trigger is released it won't starting spraying again.

I have the same problem. This is the responce for Karcher......

The unloader valve may be sticking, or is dirty. It probably needs to be cleaned and may need to be replaced, it is inexpensive. It gets a lot of use, but extends the life of the pump. The function of the unloader is to allow the machine to run in a bypass mode while the trigger of the gun is closed. First, a lack of high pressure can be caused by: 1. Insufficient water feeding to the unit, so check that the water is turned on all the way and that there are no kinks in the hose. 2. The inlet filter may be clogged. (it will need to be removed and thoroughly cleaned). 3. An internal water leak. 4.Also, low pressure can be caused by worn spray tips. If you have checked the first three with no resolution, the problem is internal and could be as simple as a sticking unloader valve. If you are mechanically inclined, you can clean this valve yourself and greasing the o-rings (use lithium based grease), or take it to a local service center. You do not need to take the pump apar
t. The unloader valve is located under the cover, and is secured with 2 bolts. (Use needle nose pliers to remove the valve) For those units with pressure and volume controls, the unloader is located under the pressure and volume control knobs themselves. Do not take any other bolts off or you will open the pump and lose the pump's oil.

Note: Lithium based grease will prevent future failure of the unloader valve.

Also, check websites such as fixya.com for tips and how-to info particularly on cleaning the unloader valve. Be sure to use lithium grease if you reassemble it.
I am going to check the manuel to see where it's at

SOURCE: New Troy-Bilt 3000 psi - Very Hard to Hot Start

When you run the unit and shut if off, release the pressure from the spray wand before trying to restart the engine. This built up pressure will cause it to be very hard to start as you have found out. If it does not start on the second pull release the pressure again. Another option is do do what I did on mine. I simply put a pull tie on the handle so I can pull the trigger back and use the pull tie to hold the trigger open. Make sure if you do this, that you remove the high pressure orifice from the end of the wand before attempting to start the engine. Otherwise the pressure will come on abruptly and could injure you or do property damage.

SOURCE: I bought a new 2600 psi pressure washer. It

Hi. I think the problem may be called either vapor lock or cavitation, or it could be called something else, but the solution is to take the wand apart in the center and let the trapped water escape, then putting it back together before re-engaging the lever.