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Dunphy X55 ignition question |
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MourningWood 
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Joined: June-13-2014 Location: NorCal Status: Offline Points: 918 |
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 Topic: Dunphy X55 ignition questionPosted: September-25-2017 at 8:45pm |
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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
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-25-2017 at 8:53pm |
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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? |
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MourningWood
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Joined: June-13-2014 Location: NorCal Status: Offline Points: 918 |
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Posted: September-25-2017 at 11:14pm |
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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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