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Tore Apart The Crusty '48 Briggs Zz


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#1 classic ONLINE  

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Posted October 27, 2014 - 07:00 PM

I took the oil pan off and removed the piston from the ZZ I recently picked up. This engine has the manual compression release, and I like the fact that the valve lash is easily adjustable on these engines. This engine turned out to be in great shape despite it's appearance. There were still machine marks on the rings and there is no play in the crank bearing and bushing. This engine is getting an NOS std. piston, rings, and connecting rod. I'll also be replacing both valves, gaskets, and crankshaft seals. A lot of the original black paint still remains under the dusty rust. Don't pass up those crusty old engines you come across! This will be a great running engine for the Mighty Mite.

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Edited by classic, October 27, 2014 - 07:02 PM.

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#2 Auburn David OFFLINE  

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Posted October 27, 2014 - 07:05 PM

Its Pretty!!!


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#3 classic ONLINE  

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Posted October 27, 2014 - 07:11 PM

The oil was thick and there was about 1/2" of oil turned to grease in the bottom of the oil pan. The seller said that it sat in the barn since '51 or '52, but he forgot what his old man was saving it for.
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#4 cootertom ONLINE  

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Posted October 27, 2014 - 07:56 PM

Looks nice. I think he was saving it for me. :rolling:


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#5 Sawdust OFFLINE  

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Posted October 27, 2014 - 08:10 PM

What a jewel, over 50 years sleeping.
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#6 Sawdust OFFLINE  

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Posted October 27, 2014 - 08:12 PM

Sorry double post...maybe

Edited by Sawdust, October 27, 2014 - 08:13 PM.


#7 superaben OFFLINE  

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Posted October 27, 2014 - 08:14 PM

It is amazing when you uncover an engine like this that has sat for that long and it is in that great of shape.

 

That's why you have to love them.  The junk they make now won't sit 50 years and still look that good!

 

Ben W.


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#8 cootertom ONLINE  

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Posted October 27, 2014 - 08:46 PM

It looks like new inside. There looks to be no build up in the motor and shiny like new.


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#9 classic ONLINE  

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Posted October 27, 2014 - 08:58 PM

I don't think there were many hours at all on this engine. Normally I have to clean black oily residue from the inside of the block and from the internal components. I'll get some pics of the piston and rings tomorrow.
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#10 Bill56 OFFLINE  

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Posted October 28, 2014 - 02:50 AM

Looks great! Engines are like people... It's what's inside that matters the most.
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#11 classic ONLINE  

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Posted October 28, 2014 - 07:31 AM

I was thinking that the carburetor was going to be a total loss. There was no top on the air cleaner and there was a pile of crust in front of the choke butterfly. After disassembling the carb, everything looks to be in great condition. One of the adjustment screw assemblies is missing completely, so I'll have to replace that and the gaskets. Some light cleaning and it should be good to go!

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#12 classic ONLINE  

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Posted October 28, 2014 - 01:34 PM

Well the carb cleaned up good. I need to order some gaskets, and I'm looking for the flat thumb screw type,high speed needle valve assembly. Does anyone have a part number for that?

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Edited by classic, October 28, 2014 - 01:38 PM.

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#13 Bill56 OFFLINE  

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Posted October 28, 2014 - 08:47 PM

That cleaned up very nice! Good job!!
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#14 classic ONLINE  

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Posted October 28, 2014 - 09:10 PM

Thanks Bill, the oily shellac, dust, and crust coating preserved it pretty good. I spent four hours with mineral spirits, Q'tips, a copper wire brush, and a couple of small screwdrivers getting it clean. I still have a little more to go on it. The throttle and choke shafts are snug, so it will be a good original carb for the Mighty Mite.
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