Having problems with your Comet GXD2527G Pressure Washer Pump ?

Hi. I'm scratch building a pressure washer using a Comet BXD2831G pump. If I don't plan on using any type of detergent, is it OK (or manditory) to plug the detergent intake to keep it from sucking air? I would use a short piece of hose over the intake with a screw in the opposite end. Also, is it possible to set the pressure by ear? If so, what should I listen for? Thanks for your help!


Answers :

No need to plug the injector because under pressure (internal force/pressure) keeps valve shut. It only opens when large nozzle (black tip) is used lowering internal pressure causing siphon effect. Some chemical injectors have a thumbwheel to shut off flow completely. Your plug idea will keep the opening clean for later use. You can adjust pressure by ear. Your pump will take a 6.5 hp engine to develop max pressure of 2700 psi, however, to extend the life of the pump and engine, adjust pressure to about 75 % of capacity or about 2000 psi. To develop 6.5 hp your engine must turn at about 3600 rpm which is over the max rpm of the pump 3400rpm. The rpm of the engine is usually set by using the appropriate governor spring. Easy task, by using the model number and type of the engine, you can determine the proper governor spring and placement on the throttle arm, maybe about 3000 rpm would be sufficient. Now with engine rpm set, turn pressure adjustment up until engine sounds to you like at full labor, then adjust down to a workable pressure for majority of work and turn up for stubborn debris. Good luck with your project.
Repair Help & Product Troubleshooting for Comet GXD2527G Pressure Washer Pump

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Hi. I'm scratch building a pressure washer using a Comet BXD2831G pump. If I don't plan on using any type of detergent, is it OK (or manditory) to plug the detergent intake to keep it from sucking air? I would use a short piece of hose over the intake with a screw in the opposite end. Also, is it possible to set the pressure by ear? If so, what should I listen for? Thanks for your help!


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