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AC45-R
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EPALLIS View Drop Down
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Joined: 12 Sep 2009
Location: Illinois
Points: 1139 		Post Options Post Options   Thanks (0) Thanks(0)   Quote EPALLIS Quote  Post ReplyReply Direct Link To This Post Topic: AC45-R
    Posted: 13 May 2010 at 10:33pm
I needed to get a set of spark plugs for my model B.  Hard to find A-C plugs.  Anyway finally found an AC 45-R plug.  The clerk convinced me this was the same thing as the AC 45 plug.  He said "R" stood for resistor which is all plugs these days.  Is this information correct and is the AC 45 "R" plug fine to use in my model B?  Going orange is going great.  Thanks for any assistance in advance.
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EPALLIS View Drop Down
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Joined: 12 Sep 2009
Location: Illinois
Points: 1139 		Post Options Post Options   Thanks (0) Thanks(0)   Quote EPALLIS Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2010 at 9:31pm
Anyone, any thoughts if the AC-45 spark plug and the AC-45R are one of the same??
 
Thanks!
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Hubert (Ga)engine7 View Drop Down
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Joined: 12 Sep 2009
Location: Jackson Cnty,GA
Points: 6355 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Hubert (Ga)engine7 Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2010 at 10:19pm
They are not the same. Is your B magneto or battery and coil ignition? The resistor plugs are not to be used with a magneto. Try Autolite 295's.
Just an old country boy saved by the grace of God.
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EPALLIS View Drop Down
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Joined: 12 Sep 2009
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Points: 1139 		Post Options Post Options   Thanks (0) Thanks(0)   Quote EPALLIS Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2010 at 10:55pm
I have 2 model "B's".  One has a magneto the other I converted over to A-C delco ignition.  So, I can't use the A-C 45R  spark plug with a magneto?  Why is that?  Thanks.
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everett048 View Drop Down
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Joined: 12 Sep 2009
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Points: 619 		Post Options Post Options   Thanks (0) Thanks(0)   Quote everett048 Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2010 at 1:33am
As mentioned above ac45R is a resistor plug no good on magnetos will slowly kill coil untill it will not start been there done that lesson learned.
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Joined: 11 Sep 2009
Location: wisconsin
Points: 33884 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JC-WI Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2010 at 10:12am
EPALLIS, DO NOT USE 'R' (resistor) plugs on a magneto. Have reworked to many magnetoes that had R plugs or carbon cored wires attached to them.
  Like Everette says, they kill a magneto. Coils were not wound for bigger gaps than what the tip of a sparkplug is set for basically. 
 
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
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Points: 11892 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2010 at 10:48am

Never use resistor plugs with a Magneto. A Magneto makes its own power, and resistor plugs and or wires disrupts the magnetic field in the Mag that produces the fire power it needs to light off the plugs. You can install the resistor wires or plugs in your Battery powered Ignition system (Distributor equipped) without a problem...  HTH

Steve@B&B
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EPALLIS View Drop Down
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Joined: 12 Sep 2009
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Points: 1139 		Post Options Post Options   Thanks (0) Thanks(0)   Quote EPALLIS Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2010 at 9:58pm
I really appreciate all this information, I'll remember to never use an "R"resistor plug with a magneto.  Good information for anyone.  Thanks again!!!!!!!!!!!!!!!!!!
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