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Chain Saw Collectors Vintage chainsaws and other air cooled gas engine saws, collecting and restoring.

Chain Saw Collectors

Partner K12 Cutoff Saw


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  #11  
Old 12-11-2016, 11:58:49 AM
Addem Addem is offline
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Default Re: Partner K12 Cutoff Saw

I pulled the spark plug and poured quite a bit of oil through there. I think I did that at the same time that I lubed that recoil. I don't know how much oil it would take to cause a lock, but most of it poured out the exhaust port. Through the port, I could see that it was very well lubed.

"Install plug with piston at top" is top on my todo list. Super.

Thanks again.
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  #12  
Old 12-11-2016, 09:48:26 PM
s100 s100 is offline
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Default Re: Partner K12 Cutoff Saw

If your engine does not complete one revolution with the spark plug removed, the plug has been eliminated as the problem, Next order of business is to find out where the engine stops. Most likely is near TDC but no guarantees this is the case. perhaps, using a light and with the spark plug removed you can see if there is a buildup of carbon on the inside of the cylinder head. If so, and if the crankshaft binds up near TDC, you know what to do.
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  #13  
Old 12-11-2016, 10:11:06 PM
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Default Re: Partner K12 Cutoff Saw

Hi,

It cranks real nice with the plug removed. I gave it one pull, and it spun longer than expected. So, it's got to be the plug or compression related, I expect. Got tomorrow off. Will check it out then.
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  #14  
Old 12-12-2016, 01:04:16 PM
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Default Re: Partner K12 Cutoff Saw

Before pulling the plug, gave it a nice pull. It cranked freely. Next is a compression check, grease crank bearings (if accessible), and clean carb. I think the decompression valve is leaking. Might just swap that for a standard plug just to get it going.

I looked through the exhaust port. It's not spotless, but there's no buildup. And, it seems like the gas is just pouring straight through-- broken gas line I suppose. But, it's got great spark.
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  #15  
Old 05-14-2017, 09:40:22 AM
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Default Re: Partner K12 Cutoff Saw

So, the Partner was moved to the back of the bench for a spell. Accessing carb required removal of two bolts whose heads were a soft metal, maybe aluminum, and they stripped off like butter. For months, been shooting them with penetrant and biting on them with pliers. Finally broke them free with hammer and chisel. Found a Tillotson carb underneath. It's gonna run...

---------- Post added at 09:40:22 AM ---------- Previous post was at 09:35:15 AM ----------

Fwiw, it appears to be a hl163a. I don't see numbers on it, but it looks identical to pics I found.
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  #16  
Old 05-14-2017, 08:47:14 PM
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Default Re: Partner K12 Cutoff Saw

After degreasing, found numbers. It is the hl163a. 82 follows that number. Does this mean it was manufactured in 82 or is the 8 2nd one made or ... ?
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  #17  
Old 05-20-2017, 09:32:09 PM
Addem Addem is offline
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Default Re: Partner K12 Cutoff Saw

Success! Got tired of waiting for kit. Cleaned carb, and it ran. It ain't pretty, but it's functional and interesting. Thanks for the help!
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  #18  
Old 09-04-2017, 10:22:37 AM
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Default Re: Partner K12 Cutoff Saw

I'm about to post on another machine that I've got, so I figured I'd give an update since much has changed with this machine.

I came across a donor K12 on ebay, and have changed a few things. The donor didn't have a pressure relief in the head, so I took that head and put it on my machine. I'm happy with that change. It's starting faster. I haven't put it to concrete since the change, but I'm sure it's got to be running stronger.

When I finally rebuilt the carb, the gunk inside was terrible, and a plug was the wrong size, so I pulled the carb from the donor, and it worked perfectly.

The flywheel seems to have broken during use. It didn't stop the project. I noticed metal rattling behind the recoil. The fan ring (that's what I'm calling it) unseated from the wheel and broke into four pieces. Hopefully, I can find another that's affordable. (The donor's was already missing.)

Still a fun tool to use!
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