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Dunphy X55 ignition question

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MourningWood View Drop Down
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    Posted: September-25-2017 at 8:45pm
Does the Dunphy x-55 w/ Ford 312 Interceptor ignition system use a ballast resistor?
I ask for the following reasons:
1. y boat doesn't have one
2. Prior owner installed Pertronix
3. After @ 20 min of running, sputters to a halt. Floods.

This is symptomatic of a friends '83 Nautique which, after several tries, was finally cured with a new coil.

4. Dunphy has new coil of correct resistance.

Thanks
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8122pbrainard View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: September-25-2017 at 8:53pm
Brian,
Yes, the 312's in the X's all used externally ballasted coils. Did the PO give you the point plate if you when back to a point set?


54 Atom


77 Tique

64 X55 Dunphy

Keep it original, Pete
<
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MourningWood View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MourningWood Quote  Post ReplyReply Direct Link To This Post Posted: September-25-2017 at 11:14pm
I'll check through my parts.

I think I looked up on the Pertronix website, and confirmed the correct ohm coil is on the boat.

The Pertronix instructions show the blast is deleted.

My symptoms are very much like an overheating coil.

Next week I'll use an IR gun to check temp.
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