Brand new Simer pump Model 2330-03 runs 10 seconds shuts off, turns back on, runs 10 seconds shuts off, etc., etc. Why is this happening?

faulty motor
could be a failed start/run capacitor
brand new --take it back for a warranty fix /exchange or refund

Pumps such as the Simer 2305 do not pump water totally down to ground level. They are designed so they do not suck up debris , sediment, etc, which can clog and ruin the pump. So if your pump leaves an inch or so of water, that is normal.

What is the model number of the outdoor unit?

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

sounds like it has a blockage may check inlet also

If the outlet of the discharge hose/pipe is

submerged you must have a 1/8" hole in the discharge
hose/pipe to prevent airlock. This hole must be open to air.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/joseph_f4ed739f62995525

every once and a while you get a bad pump or part or things just go bad.

I have the same model and found that it frequently shuts off when it gets too much pine needles clogging the strainer.
I have unscrew the bottom "skirt" almost once a month and clean it out.

Good luck!

The Simer brand of submersible dewatering pumps rely on being fully submersed in water for proper cooling and for the seals to remain water tight and effective.

According to the manufacturer, there is no oil used in the pump, other than a very small amount that was used in assembling the pump at the factory, so you shouldn't oil the pump, but rather follow the recommendations as to making sure the pump is installed properly.

Here's the owners manual for your particular pump (Model #2300) so you can check the troubleshooting FAQ's and so you can also contact the manufacturer, should you need replacement parts or need to make a warranty claim, etc.

http://www.simerpumps.com/pdf/1000001370.pdf

Hope you find this Very Helpful and best regards!

this pump needs about 21/4" of water to operate properly, this pump will not remove all the water from the cover and will cycle on and off as it looses prime. If the motor turns completely off, it may be a an issue with low line voltage. you can try using a lager gauge extension cord to try and fix it, otherwise have an electrician test the line voltage.

Here is a pdf of the manual:
http://ec1.images-amazon.com/media/i3d/01/A/man-migrate/MANUAL000049529.pdf

take a tie strap and readjust the float,, lower the float so it won't let the float get to the top of the pump or zip tie it to the pipe away from the pump,, you don't need a new pump or switch