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1948 Briggs Ns


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#16 Amigatec OFFLINE  

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Posted February 10, 2013 - 06:50 AM

So is that the reason have a '47 with a steel head and a older '47 with an aluminum head? Or was the replacement head always aluminum? I always wondered that.
 
The ID plate looks respectable for it. Looking good as always Matt :thumbs:
 

Isn't there a difference on some of the parts for the older style 8s vs the newer ones?  I can't remember if he has the newer one or not on his saw.


I have a square top on my saw. It is locked I hope I can free it up.

#17 bowtiebutler956 OFFLINE  

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Posted February 10, 2013 - 10:09 AM

So is that the reason have a '47 with a steel head and a older '47 with an aluminum head? Or was the replacement head always aluminum? I always wondered that.

 

The ID plate looks respectable for it. Looking good as always Matt :thumbs:

 

Isn't there a difference on some of the parts for the older style 8s vs the newer ones?  I can't remember if he has the newer one or not on his saw.

 

 Model N's could of had an aluminum or iron head even on the earlier ones. It didn't have anything to do with year. Briggs used both depending on application. I have a 46 with an aluminum head, and I have a 52 with the iron head.

 

 As far as differences between the round, and square 8's go, the internals are the same. The magplate, and shroud are different, and the head is different, although the chamber, and bolt pattern are the same. I recentley put a early round top mag plate, and shroud on a square 8, and everything bolted up, and the engine ran fine. Now everything changed when the 8B started, as it was an aluminum engine. Hope this helped.

 

Matt


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#18 Amigatec OFFLINE  

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Posted February 10, 2013 - 11:45 AM

My '52 Model 8 round top has an iron head. My '53 model 8 square top has alunimun.

#19 bowtiebutler956 OFFLINE  

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Posted February 10, 2013 - 05:21 PM

 Got a little more done today. I pulled everything out of the chem dip today, and as usuall the paint, grease, and grime rinsed off very easy with one exception. The Briggs decal on the shroud really didn't want to come off, as can be seen in the pictures. I had to really scrub it. Briggs made some very durable decals. I lapped the valves, and assembled the long bock. The exhaust seat in the block does have some very tiny pits, but held a vacuum very well, so I'll probabally let it be. I really need to get a valve seat cutter. The machine shop I use is very good, but they're 30 miles away from me, and closed on the weekends. Anyway, here are a few pics.

 

Matt

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#20 Amigatec OFFLINE  

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Posted February 10, 2013 - 05:26 PM

What would be the best way to free out a stuck motor.

#21 bowtiebutler956 OFFLINE  

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Posted February 10, 2013 - 06:48 PM

What would be the best way to free out a stuck motor.

 Take the head off, and spray a bunch of your favorite penetrating oil in it (I like PB Blaster) , and let it soak a day or two. Then use a piece of wood roughly the same size as the piston, and hit it with a hammer a couple times. Don't hit real hard as you don't want to damage the piston. If it doesn't break free right away, let it soak in oil a little longer, and repeat the process. I don't think there is any real sciece for unsticking one, but this usually works for me. USUALLY!  Of course this is assuming that its the piston thats stuck in the cylinder. If the engine locked up from being run out of oil, or something like that, it could be the rod is froze to the crank. Here are some pics of one I did not to long ago. This one was really bad! :thumbs:

 

Matt

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#22 Amigatec OFFLINE  

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Posted February 10, 2013 - 08:03 PM

Mines not that bad, the cyl wall looks good. I tried it the way you said. I going to have to set some more. I was thinking maybe a stuck rod too, the plus was loose so I'm thinking water ran in the motor.

#23 bowtiebutler956 OFFLINE  

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Posted February 16, 2013 - 07:35 PM

 I finally got around to finishing this engine up. :dancingbanana:  It runs very well, and looks good too. Hope you enjoy the pics, and the video. :thumbs:

 

Matt

 

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#24 Texas Deere and Horse OFFLINE  

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Posted February 16, 2013 - 11:28 PM

Very nice Matt, and it sounds good too. Nice job as always !! :thumbs:


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#25 Nato77 OFFLINE  

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Posted February 17, 2013 - 12:25 AM

I just love the sound of those engines when you idle them way down. 

All I can say about this one Matt is SHINY !   :thumbs:

 

You just put high temp paint on the muffler?


Edited by Nato77, February 17, 2013 - 12:25 AM.

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#26 bowtiebutler956 OFFLINE  

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Posted February 17, 2013 - 09:16 AM

Very nice Matt, and it sounds good too. Nice job as always !! :thumbs:

 

Thanks Brian.

 

 

I just love the sound of those engines when you idle them way down. 

All I can say about this one Matt is SHINY !   :thumbs:

 

You just put high temp paint on the muffler?

 Thanks Nate, and yes I just use VHT header paint on the muffler.

 

Matt






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