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LA Case

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DCPULLER

08-11-2009 16:48:21




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I am looking at a 1948 LA to buy. It has mag on it. There is no spark on #1 spark plug. What could this be? crack in cap or what else? Checked wire and was all the way in cap. Can you get parts for mag yet? Also what oil pressure should it have after warmed up about 1/2 throttle. It is about 10 psi. Seems low to me.
It doesn't smoke. Thanks! DCPULLER




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JGarner

08-12-2009 06:24:30




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 Re: LA Case in reply to DCPULLER, 08-11-2009 16:48:21  
If just #1 has no spark, very carefully remove #1 wire and switch with another about the same length and see if the no fire plug moves. If it does its the wire. If not, switch the plugs and see if it moves, if it does change the plugs (don't use Champion, they are now making junk. AC work well for me). If the wire and plug trick doesn't resolve the problem then dig deeper. Plugs and wires are usually the culprit before a mag on a tractor that has set a good while.

JGarner

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RobertTX

08-12-2009 05:05:06




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 Re: LA Case in reply to DCPULLER, 08-11-2009 16:48:21  
The mags often just need the points cleaned. If that doesn't work, the primary wire from the coil to the points may have rotten insulation and be shorting out, pretty common. Crank the tractor with the cap off and watch for spark at the points. The base mount magnetos are very good and usually fixable, but no parts are available. The oil pressure sounds pretty low, you might wan to try another gauge.

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Klyde

08-11-2009 20:28:32




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 Re: LA Case in reply to DCPULLER, 08-11-2009 16:48:21  
Crack in the cap--stuck or worn brush in cap--carbon track (could be on the cap or the rotor) -- or a bad wire. hth



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Alan Golden

08-11-2009 19:13:07




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 Re: LA Case in reply to DCPULLER, 08-11-2009 16:48:21  
A 1949 LA was my first Case and I LOVE IT! It is a horse of a tractor. I have about 40 PSI on oil. I am under the impression that mag parts can still be found with a bit of searching.



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Dutchman

08-11-2009 18:05:58




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 Re: LA Case in reply to DCPULLER, 08-11-2009 16:48:21  
my 48 La has 40 psi at half throttle and 25-30 at idle ... I had a local guy look at my mag ... and fix it so I'm guessing there are parts ...

I sure like mind ... it doesn't have turn brakes.. it was and option .. just a PARK Brake...

Mark



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