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Briggs Magnetron


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#1 Lauber1 OFFLINE  

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Posted June 15, 2014 - 09:28 PM

what yr did the first magnetrons come out for the Briggs engines?  I have a 1968 6hp with one, didn't know how much earlier they built them.


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#2 Texas Deere and Horse OFFLINE  

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Posted June 15, 2014 - 10:09 PM

I remember installing them on B&S points engines in the 70's, but don't know when they first used them from the factory.


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#3 trowel OFFLINE  

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Posted June 16, 2014 - 04:01 AM

 If remember correctly, 1965, model 24 10 hp.


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#4 jdslednut OFFLINE  

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Posted June 16, 2014 - 08:44 AM

I believe the first mass release of magnatrons was in 1982 thus the separate repair books for the pre-82 models.



#5 DougT ONLINE  

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Posted June 16, 2014 - 09:08 AM

I believe the first mass release of magnatrons was in 1982 thus the separate repair books for the pre-82 models.

I was thinking early 80s myself. I don't think they were a factory option in the 60s although they will retrofit back quite a ways. I've heard that there was a program to send your old flywheel back to Briggs and they would repolarize it for the magnatron. Also any flywheel with one magnet should work with them.



#6 Lauber1 OFFLINE  

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Posted June 16, 2014 - 05:18 PM

I was thinking early 80s myself. I don't think they were a factory option in the 60s although they will retrofit back quite a ways. I've heard that there was a program to send your old flywheel back to Briggs and they would repolarize it for the magnatron. Also any flywheel with one magnet should work with them.

I had thought at first someone had changed it over, but the plug wire has the factory paint of the engine on it, so it just about has to be original. This engine would have normally use a 3 pole mag, so I was surprised to find it here.  



#7 dodge trucker OFFLINE  

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Posted June 17, 2014 - 06:48 PM

well the kits would fit onto your old stock coil      and the only ones I remember needing to be re polarized were the cast iron block engines



#8 Bruce Dorsi ONLINE  

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Posted June 18, 2014 - 08:37 AM

I had thought at first someone had changed it over, but the plug wire has the factory paint of the engine on it, so it just about has to be original. This engine would have normally use a 3 pole mag, so I was surprised to find it here.  

Jeff:  What model engine?

 

If your coil has the Magnetron as an external component, it was added to the original coil at a later date.  ...That would explain the paint on the plug wire..  .....I am certain that the Magnetron was not available in the 1960's. 

 

My memory (questionable, at times) believes that Magnetron did not become standard on engines until the early 1980's, or possibly the late 1970's.

 

Magnetron was sold as an add-on kit to convert older engines to eliminate the points.  ....Replacement coils were available with the Magnetron integrated within the coil.  ....Production engines were equipped with the internal solid-state components - never with the add-on (external) kit. 


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#9 Bruce Dorsi ONLINE  

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Posted June 18, 2014 - 01:00 PM

Jeff:  What model engine?

 

If your coil has the Magnetron as an external component, it was added to the original coil at a later date.  ...That would explain the paint on the plug wire..  .....I am certain that the Magnetron was not available in the 1960's. 

 

My memory (questionable, at times) believes that Magnetron did not become standard on engines until the early 1980's, or possibly the late 1970's.

 

Magnetron was sold as an add-on kit to convert older engines to eliminate the points.  ....Replacement coils were available with the Magnetron integrated within the coil.  ....Production engines were equipped with the internal solid-state components - never with the add-on (external) kit. 

 I was wrong !!!!!   ....Disregard what I said above.

 

I just came across a B&S shroud with the Magnetron decal on it.  .....The shroud was from an 8hp vertical manufactured March 1972.


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#10 jdslednut OFFLINE  

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Posted June 18, 2014 - 01:20 PM

I think some magnetron kits came with the decal to put there when they were changed over.
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#11 Lauber1 OFFLINE  

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Posted June 18, 2014 - 04:37 PM

the engine is a 146402, and was the replacement engine sold though the Sears catalog of that(1968) time period.  Basically its an aluminum block model 14, of 6hp. Earlier ones were listed as 5.75 hp. Very earlier ones used an air vane govern, later ones used a mechanical one.  You find this engine in a lot of late 50's up into the mid 60's tractors. Once in a while an engine of this group is found on a walk-behind. There are several engines in the 140,000 group, such as 142xxx, 143,xxx, 146xxx and so on.


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#12 dodge trucker OFFLINE  

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Posted June 18, 2014 - 05:38 PM

yup the kits came with a decal to cover over the "EASY SPIN" decal on your pull starter so that '72 engine had also been "converted"

 

I remember when they came out it was early 80s while I was taking Small Engines in high school



#13 drbish ONLINE  

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Posted June 18, 2014 - 06:28 PM

1982 was when magnetron was introduced,Here it is mentioned in the 1984 update seminar
Attached File  1984 briggs.PDF   435.65KB   36 downloads I just got a new computer and it will not let me scan a picture but here is the page

Edited by drbish, June 18, 2014 - 06:30 PM.

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