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Post by canadian270 on Dec 26, 2018 22:50:49 GMT -5
I have a chance to buy a homilite zip it has 100 lbs of compression cold .i was wondering if ill start cold with that much compression?im wanting a zip.just wondering where where to get rings? May have to a complete over haul.saw seems in good shape.
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Post by onlyhomelites on Dec 26, 2018 23:37:17 GMT -5
100 PSI is pretty low...if the rings are just a bit stuck you'd be okay but if she's really that worn, even new rings won't make much of a difference. The rings are 55038...usually you can find a set on Ebay but I'll bet chainsawlady has some in stock as well.
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Post by blythkd on Dec 27, 2018 6:43:35 GMT -5
If you haven't tried it yet you could shoot some WD40 in the cylinder to eliminate the possibility of stuck rings. Get the rings soaked down and crank it several times to see if the compression comes up much.
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Post by ronaldt on Dec 29, 2018 20:51:53 GMT -5
What a coincidence! I just picked up an early Zip about a week ago. It has good spark so I shot a little gas down the cylinder and it popped right off. It sounded good until the gas ran out of course. I decided to check compression and mine showed between 95-100. I will try some penetrating fluid to see if I can pick up some compression. Thanks
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Post by ronaldt on Jan 1, 2019 14:56:19 GMT -5
I shot a bunch of penetrating fluid in the cylinder of my zip and let it sit over night. I now have 110-115 lbs of compression. Will that be good enough to make it run? I don't plan to cut with it.
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Post by blythkd on Jan 1, 2019 18:49:18 GMT -5
I'm not really a Zip authority but it sounds a tad on low side, I'd say. But if you're not going to run it to cut wood and just want to start it up to show it off to friends and family, it should last you many more years. Glad it picked up another 15 psi for you, that's gives you a little cushion to work with.
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Post by edju1958 on Jan 1, 2019 18:58:41 GMT -5
I've found that on a reed valve saw you generally need about 120 psi in order for the saw to at least run.On a piston ported saw you can get them to run at a much lower compression - 90-95.You might get lucky & it'll run at the psi you have. Ed
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Post by rowdy235 on Jan 5, 2019 0:17:19 GMT -5
Just to echo what others have said, it'll pry run on 110-120ish, albeit maybe not well.
If you can get it running I find that does wonders for loosening up sticky rings. I've had saws (and other engines) have low compression, manage to get them running and when checking again compression has went up 30-40psi. I'd keep at it with the penetrating oil and try to get it running. I wouldn't be surprised if you were able to and had a nice jump in compression to boot.
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Post by ronaldt on Jan 5, 2019 10:14:29 GMT -5
Since I had such good luck with the first round of penetrating fluid in the cylinder, I decided to try it again. This time I lost about 10 lbs of compression so it's back to about 100 lbs. Strange. I think I will still try to get it running. I dribbled a little mix gas in the cylinder, put the plug back in and it fires right up and sounds good. I see that Joe at Sugar Creek supply makes carb kits for the old brown carbs. I might give it a shot.
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Post by ronaldt on Jan 5, 2019 15:52:23 GMT -5
I am starting to doubt my compression tester. Just for fun I dumped some gas in the tank and tried to start it. After about 10 pulls it took off and ran like a top. It idles perfectly and revs up great with no bog. It's a good day!
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Post by edju1958 on Jan 5, 2019 18:51:56 GMT -5
I love to hear a good success story with minimal efforts! Ed
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Post by ronaldt on Jan 5, 2019 20:10:19 GMT -5
Thanks! Probably better to be lucky than smart?
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Post by edju1958 on Jan 5, 2019 20:13:16 GMT -5
I'll go with that.Lol Works for me sometimes too,but not often enough. Ed
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Post by ronaldt on Jan 6, 2019 12:47:16 GMT -5
Canadian 270, did you get the Zip purchased? From my latest experience, I wouldn't let 100 lbs of compression scare me away.
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Post by edju1958 on Jan 6, 2019 13:07:25 GMT -5
Just for the heck of it,after you've run the saw for a while (a couple of hrs.run time) take another compression test & see if it came up,& if so how much? Ed
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Post by rowdy235 on Jan 6, 2019 13:09:41 GMT -5
Love a good outcome! I've never been a big believer in compression gauges myself.
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Post by ronaldt on Jan 9, 2019 22:38:21 GMT -5
I ran the saw several times but did not cut with it. It starts and runs better than any of my old Homelites (And I have quite a few). I should put it under load to see how it does. I rechecked the compression and it shows 95 lbs. According to most of the replies, this saw should not run. I decided to check compression on an EZ-6 that I have. This saw has 130 lbs. according to the tester but does not start or run quite as smooth as the Zip. I'm just glad that it runs as nice as it does with out having to do anything! Still confused about the compression though.
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