Comet Garden - Page 6 - Recent Questions, Troubleshooting & Support

This is a Help forum but you should be able to find a service dealer from Comet. Here is a link to their web site. LINK

Are you only using gravity to feed the machines. The law of gravity is that, for every foot of elevation you will get 2 PSI ( pounds per square inch) of pressure. You can figure out the minimum volume that the manufacture requires and make sure that amount is being furnished to the machines. You will probable need to install a pump prior to the machines with a regulated return line to keep the proper amount of water running for optimum performance. Its very hard on the machine not to have the proper volume of water. So to answer your question, i don't believe you'll be able to get 9.5 GPM that the three machine need by simple using gravity. I hope this helps

Sometimes you can put the bolts on the pump loose and run the machine. The vibration from the motor will work the pump loose. If you do that, remove the brass head or the pump will overheat.

With out a diagram i cannot say for sure but i kinda doubt that it has to do with your by-pass.

Piston rings defective. Replace. Possibly scored cylinder walls that may need to be resurfacing or replaced.

You should dismantle and clean the manifold from the pump , it is sticking. Common

Hi: Some things to check: Is the gas old or contaminated with water. Change it if you are unsure. Are you getting a spark? To check this: BE CAREFUL. Remove the plug. Plug it back into its wire. Hold it WITH INSULATED PLIERS so the tip is close to the metal frame of the machine and have someone pull the starter cord. The plug should spark.

It's not damaged...just hydraulically "locked"...my guess is the recirc valve is shot or worn enough to put is where it won't release. Just carefully start taking stuff off the pressure head...till the pressure bleeds off
Good Luck

aftermarket oil will be fine just use same grade of oil,all manufacturers want that extra kick,

The best tool for this job is a gearpuller -- there are many types -- get one which matches your problem.

the water inlet needs a gasket like all hose connections. If its gone the pump may be starving for water.

sounds like nozzle is blocked.small bits of grit jam nozzle unscrew and make sure its clear turn water on and pull trigger to see if gun trigger works,then refit nozzle check again for spray.if clear start up and try out.if no go then pump probably needs cleaning and relubing seals.