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Pump work for about 10 minutes and then stop - Emerson Pool & Spa

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Three things kill a pump, air, electric or dirty filter
1. Make sure that you are not using an extension cord.
2. If you can see water swirling around in the basket on the front of the pump you have air working it's way in.
3. If not 1 or 2 do you have a DE or Cartridge filter. is so might need an acid bath.
If you see water swishing around in the basket you are taking in air which will work to kill the prime on a pump. Check the water intake connection on the front of the pump and the strainer lid for worn out o rings. An o ring that is cracked or leaves black reisdue on your finger needs to be replaced. Never use vasoline to lube orings.
If you want to check this insert a garden hose while the filter is off into the jet that puts water into the pool. By doing this "reverse prime" you can find the suction side (any connection before the pump) that is loose. Since they wont leek under normal operating conditions this will help flag any bad oring or connection.

Posted on Jul 03, 2009

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Stop after 5 minute


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After cooling down for a brief period (5~10 mins) the engine can usually be re-started, but the overheating problem will keep coming back.

This happens when the pump either wasn't seated against the engine properly during it's initial instalation, or the pump housing wasn't machined properly and the PTO shaft is trying to drive the pump at a slight angle = excessive friction = overheating.

Try this:
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2) With the engine power switch in the "OFF" position, slowly pull the recoil starter rope so that the engine / pump completes about two revolutions. This helps to align the pump surface with the engine.
3) Lightly snug the pump mounting bolts in a criss-cross pattern, then slowly pull the recoil starter rope again to ensure that the pump isn't binding.
4) Finish tightening the pump mounting bolts in the criss-cross pattern (approx. 21 foot pounds torque).

The entire process should take you roughly about 10 mins from start to finish.

If this doesn't remedy your problem, then try running the engine for 20 mins with the pump COMPLETELY removed so as to isolate the components.

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First 10 minutes it is working fine. After 10 mins it is getting stopped and started automatically for every 2-3 seconds.


sir i'm sorry to say you have air in your system. the trouble is at the orfis,seperating high side to low side. water molecul freezes then melts. very comon in ref. system. either pump down the system or isolate ga and add a filter dryer for that size unit

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