My honda gc 160 pressure washer i have to take the tip off the wand to get it to get to have pressure.

Whoa! Wait when water pressure is at hose you have to pull the trigger on wand to release pressure so the engine can turn freely. It has so much pressure at wand that it will not let you turn enging over. If not It may have froze up. Check the oil first , no oil then it is locked up. If not you can remove pull rope cage and try to turn it manually.

you mean gx 160 gc 160 ?

This is a problem with GC-160 and GC-190 engines on pressure washers, tillers, etc. Once they get some hours on them and as things seat in-wear in, they get to a point you can not pull the start cord. If you remove the spark plug, the engine turns easily. The valves need adjusted. The valves are set .005" to .006" off the seat. This allows enough compression release but the engine runs. I find the valves need adjusted every 25 hours, not the 100 hours Honda states.

In most cases this is because you have a high pressure tip, the red, white, yellow or green tip, on the wand. The detergent system will only work if you have the black, soap tip on the wand. With a pressure tip on the wand, there is too much back pressure for the syphon system to work. If you are using the soap tip, check the feed tube for the detergent for blockage, especially at the pickup filter and where it attaches to the water line.

This is a problem with GC-160 and GC-190 engines on pressure washers, tillers, etc. Once they get some hours on them and as things seat in-wear in, they get to a point you can not pull the start cord. If you remove the spark plug, the engine turns easily then the valves need adjusted. The valves are set .005" to .006" off the seat. This allows enough compression release but the engine runs. I find the valves need adjusted every 25 hours, not the 100 hours Honda states.

Either the pressure tip or wand are blocked or the valve in the trigger is broken. Remove the high pressure tip and either try another tip or pull the trigger without a tip on the wand to see if you have the same problem. If available, try another pressure gun on the hose.

A common mistake people make when using the detergent dispenser is to use one of the high pressure tips on the wand while trying to dispense detergent. You have to use the black, soap tip so there isn't too much back pressure in the line for the dispenser to work. If you are using the black tip, check the dispenser line and fitting where it connects to the line for anything that may be blocking the line.

If the pressure unloader is not working correctly and/or the nozzle is partially clogged with debris, the engine will be overtasked. Try lowering the pressure by turning the pressure knob to lowest setting and test. If the engine continues to run, gradually increase the pressure. Try using the washer set to about 75% of rated capacity and use max pressure for stubborn stains. Using any machine at max will shorten the life of components. If lowering pressure does not help, then unloader is faulty or stuck. Try storing the unit with oil in the pump. Remove both hoses and infuse oil into water inlet intill all the water is displaced (let set for day or two). Good luck

honda recomendes 10-30 sj/sh......19.52 oz

my Honda ic2 ran greet, then all of a sudden it started to slowly shutting down,
i restarted it. and it ran for about 5 min and shut down. i did this 3thee to four times do i need a gas additive or what