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chal View Drop Down
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Joined: 23 Apr 2012
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote chal Quote  Post ReplyReply Direct Link To This Post Topic: timing
    Posted: 23 Apr 2012 at 5:19pm
Hi everyone
 
I have a allis b with lucas magneto sr4 on it
wanted to know is there a way to time the two gears in the magneto
i set num 1 cyl on compression stroke firing @ tdc with magneto clicking
it will start with a little pull and run fine but will not start with the handle
 
any ideas?
 
cheers
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
Location: NW Illinois
Points: 22824 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2012 at 5:24pm
When you crank it by hand, can you hear the impulse snap in the mag? Sometimes if the impulse isn't working, they don't start well cranking but will start and run fine with a pull.
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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chal View Drop Down
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Joined: 23 Apr 2012
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote chal Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2012 at 12:39pm
Yes magneto is clicking @ tdc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2012 at 1:11pm
Not for sure about a Lucas Mag. A Bosch, Wico , and Fairbanks Morse compensate the needed timing by retarding the spark the necessary amount to allow for crank starting. During that same process, (impulse snap) it then immediately snaps forward under spring pressure to create the needed speed to power the coil and condenser to create a ggod spark when operating correctly. It sounds to me like the Lucas mag is not creating the needed timing compensation to allow it to start at slow turning speed, but it is ok when turned at a higher speed. Explaining why it is ok on the pull start. Either that or the coil in the mag could also be weak, but has enough to go when the spinning speed is fast enough.
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CTuckerNWIL View Drop Down
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Joined: 11 Sep 2009
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Points: 22824 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2012 at 3:15pm
I think I would try to find a known good mag to swap out and try it.
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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chal View Drop Down
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Joined: 23 Apr 2012
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote chal Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2012 at 4:45pm
I finely found out wat was wrong num2 & num3 plug leads were on wrong round
 
Tanks for the relys
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CTuckerNWIL View Drop Down
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Points: 22824 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 24 Apr 2012 at 6:08pm
Clap Thumbs Up
http://www.ae-ta.com
Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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