Question about Malibu Intermatic Inc. ML300RTW 300-Watt Power Pack with Timer and Ground S

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How do you set the timer on Malibu 300 watt transformer, ML300RTW. I have the pins in the right spots, but the timer doesn't go around. I there a on/off switch to activate the unit?

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Make sure there is power to the plug. Then set the clock and install the on and off pins to control the lights. The on/off switch is for manually turning on the lights. The clock should run as soon as it's plugged in.

Posted on Jul 02, 2009


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I have a Malibu 300 watt ML300rtw, timer goes until it reaches "on" pin then stops. if i manually turn timer, i hear click and lights go on - they turn off no problem. pins are not broken. what next?

Sounds like the mechanical timer assembly likely has never been lubricated, You may use a lightweight oil, such as WD-40, to lubricate the timer mechanism.

May 09, 2015 | Malibu ML300RTW - Low Voltage Power Pack...

1 Answer

My Malibu ML 300 RTW has stopped working, but I can hear the timer. No lights come on, though.

Sounds like the transformer died which isn't uncommon. One cause is overloading the circuit (too many lights) figure out the total wattage by adding the bulb watttage usually 11 by the amount of lights you have. I would buy a transformer with around 200 Watts higher than you need to allow for expansion and the transformer wont have to "work" as hard.

Aug 28, 2011 | Intermatic Malibu 300W Power Pack...

1 Answer

I have a Malibu 300 watt ML300rtw transformer for outside lighting. The timer stopped moving and when I took it apart the small plastic gear was worn down and it was not turning the timer. Is there...

I don't know any site selling power pack gears.
Maybe ebay has gears or sells used power pack.

Easiest thing might be buy cheap plug-in timer, set power pack to override, and plug power pack into cheap timer.

Intermatic does not sell the timer module separately, or the gears.

Aug 13, 2011 | Intermatic Malibu 300W Power Pack...

1 Answer

Dim lites at end

You have a bad case of 'voltage drop my friend. Your transformer is probably undersized. Add up your bulbs and you have 234 watts. You're probably using a 200 watt x-former, right? Either lower the bulbs wattage to 11 watts, or get a 300 or 400 watt x-former.

Jun 20, 2009 | Intermatic Malibu 300W Power Pack...

1 Answer

I have a 600w transformer and it have 2 300w circuits. Can I use 600 watts through one line i circular line?

There are two sets of terminals on the 600 watt x-former. If you have two 300 watt circuits, use one 300 W circuit on one output, and the other 300 W circuit on the other output. Use terminals A & B on each side. Each circuit will have 12 volts.

Jun 14, 2009 | Intermatic Malibu 300W Power Pack...

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