4running 14 Report post Posted October 20, 2009 Alright- After some reading, I am revisiting this issue, the same issue I seemed to have with my last machine. This is a gas powered hot water machine, 2000 PSI at 2.5 GPM. I turn the water on at the spicket, walk over to the machine, and pull the recoil. The engine ALWAYS starts first pull and runs out great. The machine is at 2000 PSI according to my gauge. After about 20 seconds, I pull the trigger on the wand, and the engine dies. I restart the engine, and the engine dies after pulling the trigger again. After two to three more times, I restart it again and it seems to work ok, the pressure is at 2200 with the trigger gun closed and at 2000 with it open. (about 10% which the idea right?) Sometimes when the machine is running for the first time that day, the engine will bog down, with the trigger open and the pressure will go to almost ZERO. then slowly build back up, after 2-3 seconds. The machine will always work perfect after a few minutes of messing around. Sounds like I need an unloader right? Well, I am not so sure...... If the unloader holds the pressure with the trigger open at 2000 PSI, and unloads at 2200 PSI what could be wrong with it? After almost 3 years of having a pressure washer you would think I would understand these valves a little bit better. But I guess I don't. Share this post Link to post Share on other sites
4running 14 Report post Posted October 20, 2009 Just to double check according to my reading of the nozzle chart, I should be using a size 3.5 nozzle. So if I want a 15 degree fan, I would use a 15035. Correct? Or should I be using a 4? Share this post Link to post Share on other sites
Russ Johnson 141 Report post Posted October 20, 2009 You're right on the nozzle size. Your running problem could just be not enough warm up time. Modern small engines are required by the EPA to run lean. A lean mixture in a cold engine doesn't support horsepower very well. Share this post Link to post Share on other sites
Paul Kassander 26 Report post Posted October 20, 2009 I don't think you have an unloader issue as the problem would be constant not just at start up. Like Russ said I see this fairly frequently on some older engines, once they warm up they are usually fine. Share this post Link to post Share on other sites
