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1952 Briggs Npr6, They Don't Make Em Like They Use To!


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#1 bowtiebutler956 OFFLINE  

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Posted October 19, 2012 - 09:44 PM

Most people like to start they're restos with something decent, but not me, I like starting with the ones that look like they belong in the scrap yard! :bigrofl: Well, I picked up this really nasty looking 52 Briggs NPR6 the other day, and although it wasn't locked, it didn't have any compression. Upon removing the shroud I found a mouse nest, and of course a rust hole below that from their pee! :wallbanging: I was expecting it to be trashed inside, but I couldn't believe my eyes when I really got it apart. The only reason it didn't have compression was the intake valve was hung open a little, and all I had to do was push it down with my finger. The cylinder, piston, rod, and crankshaft all looked as good as new! :D The valves were like new as well, with nothing but a little carbon on them. The head has one broke off cooling fin, but I had a spare in the shop. It had a fair amount of carbon in it, so it definitely got used, but it shows almost no signs of wear. They just don't make em like they use to! Here are a few pics of what I have so far, and I'll post more soon. Thanks

Matt

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#2 bowtiebutler956 OFFLINE  

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Posted October 19, 2012 - 09:45 PM

Here are a couple more.

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#3 ol' stonebreaker OFFLINE  

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Posted October 19, 2012 - 09:58 PM

That's from when they were built to last, not to throw away in a very few short yrs. I'm amazed when I occasionally see a 235 Chev 6 still purring.
Mike
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#4 Nato77 ONLINE  

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Posted October 19, 2012 - 11:56 PM

That thing looks in very good shape! Shouldn't take much to get it running again.
Do you have a good pic of the governor set up for one of them? Been dinkin around with a couple of my Power Hoes to get the governor to work as it should. The manuals I got just have pic of the parts individually and not together. Don't know for sure where all the springs and linkages are supposed to be attached. When I got them the linkages and springs were all messed up.

#5 Texas Deere and Horse OFFLINE  

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Posted October 20, 2012 - 09:33 AM

Matt, I don't know where you keep coming up with those engines, but you continue to find some real sweet ones down there at the border. :thumbs:

It looks like it was just rebuilt and set aside, very nice. :D
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#6 glgrumpy OFFLINE  

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Posted October 20, 2012 - 10:57 AM

That's quite a long skirt on that small diam piston! Never heard of this model myself before. What is that gear reducer for? Can that come off or is built on? If not removable, think would limit the usefulness of the engine.

#7 Nato77 ONLINE  

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Posted October 20, 2012 - 01:43 PM

That's quite a long skirt on that small diam piston! Never heard of this model myself before. What is that gear reducer for? Can that come off or is built on? If not removable, think would limit the usefulness of the engine.

I know they were used on the 40's Power Hoes and possibly other walk behinds.002.JPG

#8 LilysDad ONLINE  

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Posted October 20, 2012 - 05:06 PM

I like it!!! Do you have the gas tank?

#9 bowtiebutler956 OFFLINE  

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Posted October 20, 2012 - 06:45 PM

That thing looks in very good shape! Shouldn't take much to get it running again.
Do you have a good pic of the governor set up for one of them? Been dinkin around with a couple of my Power Hoes to get the governor to work as it should. The manuals I got just have pic of the parts individually and not together. Don't know for sure where all the springs and linkages are supposed to be attached. When I got them the linkages and springs were all messed up.

Here are a couple pics of one of my engines. All my engines use the air vane governor, but I know some the DB's model N's had a mechanical governor. If your governor rod comes from more towards the pto side of the engine, its mechanical. If the rod comes out from behind the magneto plate, its an air vane. Here are a couple pics, and I'll try to get you some better ones tomorrow, of just the mag plate with springs.

Matt

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#10 bowtiebutler956 OFFLINE  

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Posted October 20, 2012 - 06:49 PM

That's quite a long skirt on that small diam piston! Never heard of this model myself before. What is that gear reducer for? Can that come off or is built on? If not removable, think would limit the usefulness of the engine.

To answer your question, the gear reduction unit is removable, but all the crank has on the end of it is a gear, so it wouldn't do you much good. The NPR6 is jus another variation of the model N.

I like it!!! Do you have the gas tank?

No, I don't have a tank right now, but i'll have one soon.

Matt

#11 bowtiebutler956 OFFLINE  

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Posted October 20, 2012 - 06:54 PM

Here is todays update. Finished cleaning the block, gave the cylinder a quick 5 second hone, installed new rings, lapped the valves, installed new gaskets, and painted it! It was a good day. :D Here are some pics. :thumbs:

Matt

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#12 Nato77 ONLINE  

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Posted October 21, 2012 - 02:35 AM

Thanks for the pics Matt, that helps me out alot.
I'm just wondering if the PO had put a different spring on my engine, being they have another spring on the other side of the carb shaft to hold it back to idle (I think).
Looks like you got all new gaskets and parts. Are they still making parts for these engines? Haven't looked to hard yet.
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#13 bowtiebutler956 OFFLINE  

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Posted October 21, 2012 - 03:59 PM

That thing looks in very good shape! Shouldn't take much to get it running again.
Do you have a good pic of the governor set up for one of them? Been dinkin around with a couple of my Power Hoes to get the governor to work as it should. The manuals I got just have pic of the parts individually and not together. Don't know for sure where all the springs and linkages are supposed to be attached. When I got them the linkages and springs were all messed up.

In the first pics I showed you, they were of an engine that had a set throttle speed. All it had was a thumb screw on the governor that you adjust to the desired RPM. Here are some better pics of one set up for a throttle cable, which is probabaly what your Power Hoes have. This is still the air vain type. The first two pics are of the large spring, and where it hooks up at. The next pic is of the smaller spring, and I'm holding the other end of it up, which is where it would hook to the carb. The next two are of the gair vain governor itself, in both throttle up, and down position. The last pic with the screwdriver is where the throttle cable is secured at on this type of governor. If you have the air vain gov, these pics should help, if yours is mechanicle then these are worthless. :bigrofl:

Matt

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#14 bowtiebutler956 OFFLINE  

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Posted October 21, 2012 - 04:09 PM

Thanks for the pics Matt, that helps me out alot.
I'm just wondering if the PO had put a different spring on my engine, being they have another spring on the other side of the carb shaft to hold it back to idle (I think).
Looks like you got all new gaskets and parts. Are they still making parts for these engines? Haven't looked to hard yet.

I just noticed you had already replied. :bigrofl: My last pics should clear thing up on the springs. Yes you can still get parts for them. Just give Will a call at 1-540-273-7541. He has a vintage Briggs parts store on ebay, called Wills What Nots, but he only has a very small amount of his inventory on ebay, and he'll give you a better price going through him directley. Tell him Matt sent you. Beware, he'll talk your ear off about these old Briggs engines, and he curses like a sailor, but he really is a very friendly guy.

Matt
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#15 bowtiebutler956 OFFLINE  

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Posted October 21, 2012 - 04:18 PM

Now for day 3's update. Got the engines mostly assembled, and it has fantastic compression, and fire, so as soon as I get the carburetor, fan shroud, and fuel tank handled, she should run like new. :dancingbanana: Here are a couple pics. Thanks

Matt

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Edited by bowtiebutler956, October 21, 2012 - 04:20 PM.

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