Timer running very slow on my malibu ml200rt - Malibu ML200RT - Low Voltage Power Pack -200 Watt - With Timer - Plastic Ho

You might need new trippers.
But if override will not turn lights OFF, then plug power pack into cheap wall timer.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html
Link above has trippers, troubleshoot, installation tips, and warranty
Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#wire

Gene
h

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Open following link for Intermatic/Malibu ML series trippers plus power pack tip
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

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Yes, you can replace the ML200RT with the ML300TW without a problem, and you will have an extra 100 watts for more lights if you want.

I suspect the Malibu tripper wears out since they're made of plastic.
But I can't find replacements.
I searched the web for replacement Malibu trippers, but found none.

Malibulights.com does not show any replacement parts for Power Packs or timers on any page.

I bought a new 200W power pack from Home Deport last week, thinking there might be some information with the product. The new power pack no longer has the dial. It has a digital control where you push buttons.

The Malibu ML200RT is intended to operate _12_ volt AC (low voltage) lighting _only_.
Assuming your fountain pump is 120 volts, the needed set up would be to supply 120 volt circuit to an Intermatic T101 timer (or similar timer), then connect a GFCI receptacle to the load side of the timer. You could then plug your fountain pump into the now timer controlled GFCI receptacle.
You can use the same 120 volt circuit that supplies the ML200RT transformer.

http://waterheatertimer.org/Malibu-power-pack-stopped-working.html#install

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

If you have a meter you can test for 12 volts AC on the output of the transformer. They go to terminals
A & B

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

I used the transformer and used another timer and it works like a dream of course you have to take the trippers out.

First check to make sure that you do not have more watts pulling than is recommended. If this is ok then pull both the red and black plastic pin from the timer and replace them then try. If neither of these solutions work you may have a problem at power source.