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Lucas 25D and Petronix igniter

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Lucas 25D and Petronix igniter #1
Van-island-mgb Peter Wilson Comox, BC, Canada Sign in to contact 1970 MG MGB	Topic Creator (OP) Apr 22, 2024 06:31 PM Joined 10 years ago 314 Posts

This afternoon I was reinstalling my distributor. I inadvertently connected the red and black wires to the wrong terminals on the coil. Turned on. The ignition and there was a “pop”. Have I fried the pertronix?

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Re: Lucas 25D and Petronix igniter #2
MG Cobbler Fred Horner Westford, MA, USA Sign in to contact 1948 MG TC 1955 MG TF 1500 1958 MG MGA 1500 ~ For Sale ! ~ 1959 MG MGA 1600 & more	Apr 22, 2024 06:35 PM Top Contributor Joined 8 years ago 2,703 Posts

Yes. Solid state parts do not like to be hooked up backwards.

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Re: Lucas 25D and Petronix igniter #3
Van-island-mgb Peter Wilson Comox, BC, Canada Sign in to contact 1970 MG MGB	Topic Creator (OP) Apr 22, 2024 06:46 PM Joined 10 years ago 314 Posts

Thanks for the confirmation. Another now on order.

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Re: Lucas 25D and Petronix igniter #4
ingoldsb Terry Ingoldsby Calgary, AB, Canada Sign in to contact 1971 MG MGB	Apr 22, 2024 07:50 PM Top Contributor Joined 20 years ago 20,217 Posts

Since you are ordering a new one, replace with an Ignitor II. Variable dwell, protection against leaving the ignition on, and the option of using lower resistance coil. For the latter, you do have to switch to a voltage triggered tach (or make other mods). But the dwell and power on protection can be used with the standard setup.

Terry Ingoldsby
terry.ingoldsby@DCExperts.com

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Re: Lucas 25D and Petronix igniter #5
Steven 67GT Steven Rechter Jackson, CA, USA Sign in to contact 1967 MG MGB GT	Apr 22, 2024 08:02 PM Top Contributor Joined 13 years ago 4,939 Posts

In reply to # 4788198 by ingoldsb Since you are ordering a new one, replace with an Ignitor II.

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Lucas 25D and Petronix igniter

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