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

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ML300RTW 300 I need an operators manual ML300RTW 300

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  • Kelly
    Kelly Oct 01, 2010

    The link tht was given a 4 TU above no longer works: Service/OwnersList.aspx?category=Low Voltage Lighting

    Server Error in '/' Application.

    The resource cannot be found.
    Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

    Requested URL: /Customer Service/OwnersList.aspx

    Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4927

  • electraglyde Oct 01, 2010

    Sorry, you are right it no longer works, but it did at the time I posted it. I always double check to make sure.



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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...

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I've moved into a house with the ml300rtw timer and I dont know how to set it . I've tried but it comes on at the wrong time. What am I doing wrong?

Here is the 300Watt power pack manual with detailed setting instructions
Replacement parts are not available for Power pack or timer

Couple things to remember:
Power pack has to have correct number of lights
For example, you need 15 - 20Watt bulbs
15 x 20 = 300 Watts for 300 Watt power pack
If you have fewer bulbs, the bulbs will burn out quickly and power pack will fail
When bulb burns out, replace as soon as possible, or other bulbs will be overpowered and then more bulbs burn out

Up-vote if this helped. Thanks for the feedback.

Oct 13, 2010 | Malibu Intermatic Inc. ML300RTW 300-Watt...

1 Answer

Where is the manual ON/OFF switch on the ML300RTW

It is located next to the mechanical timer wheel. It's not so much a switch as is it a small black stem that you have to turn (clockwise) to turn the timer ON or OFF without advancing the timing wheel.

Hope this helps and you find it Very Helpful - best regards!

Sep 06, 2009 | Malibu Intermatic Inc. ML300RTW 300-Watt...

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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?

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.

If you need further help, I’m available over the phone at

Jul 01, 2009 | Malibu Intermatic Inc. ML300RTW 300-Watt...

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