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Briggs Model N Restoration


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#1 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 08:43 PM

Hello all, I thought I would document the refresh of this little Briggs Model N here. The Briggs Model N was produced from 1940-1954. I have no idea what year this one is, since its missing its tag, although it is one of the latter models, as it has an aluminum head. The early models had cast iron heads. This engine is one of the industial series, as it also has a ball bearing for the crankshaft as opposed to the bushings most had. I have another N here for parts, and it only has a bushing. The guy I bought it from said he got it for a project for he and his son to mess with, but they weren't mechanics, and couldn't get it running. No wonder, the points were all crusted up, and they weren't opening. I got it in the mail today, and couldn't wait to check it out, so I tore it down right here at the house. :laughingteeth: I opened it up to find it had a .010 piston, and the cylinder is beautiful with no ridge. :thumbs: However it has some strange marks around the exhaust valve, they were doing something to it. I'l know more tomorrow when I pull the valves. I notice the exhaust pipe nipple is broke off in the block as well, but thats no big deal, I've removed many of those over the years. The crank, and rod have a marks you can see visually, but can't hardly feel with your finger, I believe the cranks will polish very quickly with a little 320 grit emery cloth. Sorry for being so long winded, the updares will be shorter. :smilewink: Here are some pics.

Matt

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Edited by bowtiebutler956, June 29, 2012 - 08:50 PM.

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#2 Texas Deere and Horse OFFLINE  

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Posted June 29, 2012 - 08:51 PM

Matt, that a great looking little Briggs. I wonder if the difference between the "N" series and the "S" series is the Carb. and gas tank. That thing looks just like the 5S I have, except for mine has the carb and tank mounted as one unit.

#3 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 09:34 PM

Brian, I've never delt with a 5s, but I did have a 6s years ago. I can tell by looking that the head, and the pan are different, but they sure look similar. Does the 5s have a mechanical governor, or a wind vain type? I'll take some better close up pics tomorrow, and post them. If you could post some close up pics from different angles, we could compare, and tell how different, or alike they are. :thumbs:

If you do take pics, just post them here in this thread for easy refference.

Matt

#4 powerking56 OFFLINE  

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Posted June 29, 2012 - 09:52 PM

Nice looking N, funny you should post this tonight, This evening I dug out a 6S I had bought a couple years ago, dubbed with a bit off and on since, and with a bit of carb cleaner and fresh gas I was able to get to fire and run!! :thumbs: Both the 5S and 6S have the air vane type governor and the vacujet carb. Simple, reliable and easy to work on. They are one of my favorites.
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#5 Texas Deere and Horse OFFLINE  

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Posted June 29, 2012 - 09:57 PM

Peter, Can you put the "N" style carb on the "S" series engine. I don't want to use the tank that's mounted under the carb. on my 5S.

#6 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 10:41 PM

Well, I just did some research on a 5s, and I retract my earlier statement, the head looks the same to me. Actually these engines are very similar. The 5s has a 2.00 bore, and a 1.50 stroke, and is rated at 1hp. The N has a 2.00 bore, and a 2.00 stroke, and is rated at 1 1/2 hp. I think that the N type carb would bolt up, although I'm not sure how the linkage would work out. Here are a few pics of the the backing plate, with the linkage setup, and a pic of the block where the carb bolts up. :thumbs:

Matt

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#7 Texas Deere and Horse OFFLINE  

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Posted June 29, 2012 - 11:09 PM

Thanks Matt, I can't get to engine until Monday, it's at the shop, 50 miles away and my wife and girls come home tomorrow after being gone for 2 weeks. So i will be Monday before I can get any pictures of my engine.

#8 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 11:12 PM

You will definately be busy tomorrow. I hate it when I'm seperated from my wife and kids for more than a day or two.

Matt

#9 Texas Deere and Horse OFFLINE  

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Posted June 29, 2012 - 11:16 PM

I've been keeping busy between GTtalk and tearing K321's apart after work. I don't like them gone for this long, but they wanted to spend time at Nanna/ Poppop place in N.C. I be glad when there back home !! :smilewink:
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#10 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 11:28 PM

Amen to that !

Matt

#11 Lauber1 ONLINE  

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Posted June 29, 2012 - 11:40 PM

You can date any N by the number stamped on the back rim of the flywheel. It will be in a littel circle thing and will have the last 2 of the yr in it.

N, 5,6 are all basically the same engines with just little things inside/outside differant. They also used alumumn heads from the start, and blower housings. It all depended on the sub model being built
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#12 bowtiebutler956 OFFLINE  

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Posted June 29, 2012 - 11:49 PM

Thank you Lauber1, I just checked, and the one I'm rebuilding is a 53 model. :thumbs: I don't have the flywheel off of the one with the cast iron head yet, but I'll find out tomorrow. I sure do appriceate your help. I really like this place, lots of helpful people! :smilewink:

Matt

#13 chris m OFFLINE  

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Posted June 30, 2012 - 03:52 AM

Good luck on the N! I to have the 5S engines, and I love them!

I was also wondering the same as Brian. I would love to adapt a different carb onto the 5S. From your pictures the intake port looks to be at the same angle as the 5S. I'll have to look closer at mine later.

Thanks for the pictures! And I look forward to seeing your progress :thumbs:
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#14 Wheel Horse Kid OFFLINE  

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Posted June 30, 2012 - 07:04 AM

Looks like you have a great start on the Briggs N motor! Good luck with it!
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#15 MH81 ONLINE  

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Posted June 30, 2012 - 08:20 AM

Looks like you have a great starting point. That engine has been kept well.

Where did you find the info for the engines? I have a 6b that I'd like to know more about.
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