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Junker A/c Big Ten Cleaned Up, Running, And Put To Work!


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#16 boyscout862 ONLINE  

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Posted July 18, 2014 - 07:12 AM

Add Marvel Mystery Oil to the gas. 1 tablespoon per gallon. It will clean and lubricate the combustion chamber and piston including the rings. Good Luck, Rick
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#17 classic ONLINE  

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Posted July 18, 2014 - 08:41 AM

Thanks for the tips guys. I'll keep an eye on the oil level since I don't have the parts to rebuild it yet. I should be able to get around to the engine overhaul within a couple of weeks. The baffle is burned out of that muffler and it's way too loud, so a repro Nelson has got to go on this thing.

Edited by classic, July 31, 2014 - 10:00 PM.

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#18 classic ONLINE  

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Posted July 31, 2014 - 09:49 PM

Well, I've mowed with the tractor twice and hauled a few things around the property and the tractor has been running great. I do smell a little burning oil from the exhaust, so I'll be throwing a new piston and rings in it soon. I found an NOS piston assembly with chrome rings on ebay for 25 bucks shipped! I found a couple of pairs of Guide headlights in need of some work, but at least I have a decent pair to use. The light bar came in today, so I tossed it on to see how it will look. I'm going to paint the rims, the wheel weights, and the dash to clean it up a bit. I put the Nelson muffler on it from a different Big Ten and it sounds like it should, but it needs a coat of exhaust paint. I still have some more cleaning up to do on the tractor, but it's coming along.

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#19 MH81 ONLINE  

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Posted August 01, 2014 - 07:07 AM

Very nice tractor. I'm sure the engine refresh will be an improvement.
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#20 boyscout862 ONLINE  

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Posted August 02, 2014 - 09:35 AM

I've saved many engines over the last 47 years with just the Marvel. Try it and you may save yourself some time. Good Luck, Rick
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#21 classic ONLINE  

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Posted August 02, 2014 - 11:21 AM

When I had the head off to remove the carbon, I could see that the ring end gap looked to be well over .030. I had a new set of rings in the shed, so I slid one down in the bore and the ring end gap was .011-.013,so the old rings are a bit worn. It won't take long to toss the new piston and rings in and get some more life out of it.

Edited by classic, August 02, 2014 - 11:37 AM.

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#22 AfterShock95 OFFLINE  

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Posted November 11, 2014 - 10:57 AM

I have a big ten and it's a great little tractor
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#23 Trav1s OFFLINE  

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Posted November 11, 2014 - 11:38 AM

Nice tractor.  I would suggest John Deere Muffler black paint for the muffler.  It works great and stays in place with time and heat.


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#24 The Junk Doctor OFFLINE  

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Posted November 22, 2014 - 08:35 PM

Nice tractor you got there. When you put in the new piston and rings, give her a light honing, it does wonders. And as the others said, Marvel is awesome.
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#25 classic ONLINE  

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Posted November 23, 2014 - 11:05 AM

Thanks for the tip on the muffler paint Trav, I'll give it a try. The engine from this Big 10 will be going in another Big 10 that I'm restoring Junk Doctor. I've since installed a 16hp Briggs in this tractor and I use it regularly now. I picked up a Garden Mark Squire the other day and it ran well, but also did burn oil. I installed another piston, new rings, and a new connecting rod in the Squire, and no more smoke. Lightly honing the cylinder is a given on a rering job or a rebuild. Most of these old Briggs engines I've pulled apart have heavily worn rings from years of use. In most cases, a new set of rings is all they need.
Here's a pic of this Big 10 now with the 16hp, and the Squire.

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Edited by classic, November 23, 2014 - 11:06 AM.

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#26 The Junk Doctor OFFLINE  

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Posted November 23, 2014 - 12:29 PM

16 HP? I like the way you think.

#27 classic ONLINE  

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Posted November 23, 2014 - 04:21 PM

The 16hp Briggs came in an Allis Big Ten that I picked up for parts. It's a great running engine, so it's in the Big 10 that I'll use the snow thrower on this winter.
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