cg23cpo
Gots Tree Cred
keep collecting more and more
Posts: 30
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Post by cg23cpo on May 4, 2020 22:04:25 GMT -5
Fairly new here to the site as I have been lurkin' n readin' a lot. I have 4 Homey's - Super 2 (workin' n runnin', but needs tlc), XL-12 (runnin' n smokin', will be takin' that to the correct forum) 330 (curb find, have not even looked at it), Super XL (manual oiler, curb find, missing everything in the air box except throttle and choke arms).
So I want to get the Super 2 workin' correctly and have a few questions. 1. Runs close to wide open all the time, dies when throttle let off - suspect check valve in the carb behind the screen. pouring gas out the muffler, parts ordered.
2. smokes quite a bit - what is the proper fuel mix? (I have 6 cans of Homelite 2 cycle oil), duck bill is intact in the oil tank, but might need to replace.
3. how much oil should be going out to the bar? 4. where's a good point to start with the idle screw? 5. Is there a no load max RPM that should not be exceeded? lest it turn from saw to grenade.
Saw was given to me by dear old Dad who volunteers at The Audubon Community Nature Center in NY because they kept runnin' outta patience tryin' ta start it. My son is the motivator as he is going to forestry school in the fall and wants some saw time before he gets there.
Waiting to see what y'all have ta say and parts arrival.
Great site and people have been really helpful. Just having a bit o' fun with the wording.
Regards
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Post by rowdy235 on May 4, 2020 23:06:01 GMT -5
First off, welcome aboard! Sounds like a nice group of saws. I'm partial to the Super 2 myself but your other saws are also very nice, I'm sure you'll enjoy running them. It certainly sounds like your carburetor is having issues, but you also may have an air leak (can cause to run lean and the high RPMS). I'd check to make sure the carb gasket is good when you remove, but also wouldn't hurt to have a look at the crank seals either. Fuel mix is always a highly debated topic. I like to run 32:1 with a good quality oil, but I've ran 50:1 in the past with no issues. As long as you're running a good oil and keep the tune good, you shouldn't have any issues. But then again modern oils don't foul plugs near as bad as in the past so a little extra don't hurt  . All fuel mix questions aside, the Super 2 series of saws do tend to suck bar/chain oil in if the "duck bill" is missing on the pulse line in the oil tank or if the lines are mixed up. Pop off your bar oil cap and see if there is a duck bill (small orange rubber piece) on the hose that doesn't go down to the bottom of the tank. If not, I'd bet that's causing your smoking, or at least not helping matters. The oiling systems on these saws are marginal at best (probably my least favorite thing about these saws). You should be getting enough oil to keep the chain lubricated, from there, its really just "is what it is". When you're checking the duckbill as described above wouldn't hurt to take a look at the whole system to make sure everything is connected and functioning properly. I'd start with the high and low mixture screws about 1.5 turns out and turn the idle speed screw in just enough to where the saw will idle. Then, as you adjust the low speed mix, you can turn the idle down until you have it at a "happy place". There is a spec for the idle speed, but I usually just set mine to where the chain doesn't turn at idle. From what you've described, the saw appears to have an air leak and be running lean. I'd avoid any WOT time with the saw in that condition. Once fixed you should richen the high speed mix to where the saw "4 cycles" at WOT (will sound like a miss) with no load. I think there is a no load RPM spec but I've never used it to tune any of my saws, as long as you're 4-cycling you shouldn't be in any danger of burning anything up. Keep us posted on how it goes! Post some pics when you can as well! |
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Post by ken8831200 on May 5, 2020 8:06:57 GMT -5
Have read a few times about this "4 cycles" at WOT description. Having a problem understanding it, any chance some on could post a video with sound to let me here what is being described?
As for a Super 2 with smoking problem caused by missing duck bill. That one I know full well almost tossed my old saw thinking it had a major problem till I read on this site about that!
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Post by sweepleader on May 5, 2020 8:07:05 GMT -5
I think Rowdy covered most of it, sounds like you are on a real tear with all those saws.
If you have actual cans of Homelite oil, it might be quite valuable to collectors out there, and new oils are likely better for the saw. Check around a bit before you open those cans.
The oil hoses are easy to mix up, and depend somewhat on which version you have. Connected incorrectly they can suck bar oil into the crankcase and cause heavy smoke.
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Post by Brennan on May 5, 2020 12:13:59 GMT -5
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cg23cpo
Gots Tree Cred
keep collecting more and more
Posts: 30
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Post by cg23cpo on May 7, 2020 22:28:05 GMT -5
So, verified routing of the oil lines as correct. Running 16:1 (per manuals) with old homelite oil and lines may have been wrong at some time in the past. We'll see what it does after running a bit. Thanks for the photos.
Received the HDC carb kit from Amazon today and low and behold the wrong metering diaphragm is supplied. Nub is too high.
Does anyone know the correct height for the nub? Can this be modified to work correctly?
Kit was advertised to fit the Homelite Super 2 (and a host of other 2 cycle applications). Selected this kit as it had carb kit, fuel lines and fuel filters. Of course it has English and Asian writing on it.
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Post by Brennan on May 8, 2020 0:48:14 GMT -5
I’ve found the Chinese rebuild kits tend to be for newer designs and the China carbs. One could theoretically sand the nub down but I don’t know the spec. You could compare to the old one but obviously there’s been some wear over the years so be careful
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Post by 5terrysupersaws on May 8, 2020 13:08:14 GMT -5
Received the HDC carb kit from Amazon today and low and behold the wrong metering diaphragm is supplied. Nub is too high. Does anyone know the correct height for the nub? Nub height is approximately .018" - .020" , measured with a feeler blade on a lightly used diaphragm. |
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cg23cpo
Gots Tree Cred
keep collecting more and more
Posts: 30
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Post by cg23cpo on May 8, 2020 19:39:48 GMT -5
Measured the part I received and it is .0645. So about 0.044 to high.
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Post by xl130 on May 9, 2020 5:47:42 GMT -5
Measured the part I received and it is .0645. So about 0.044 to high. I encountered the exact same problem with a kit from a seller on Amazon in Canada. It’s hit and miss. I have had good kits with no problems and bad ones. The K10-HDC seems to be the most problematic. I just informed the seller of the problem and they refunded me in full. |
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Post by xl130 on May 27, 2020 5:38:49 GMT -5
I just rebuilt a new to me XL-2 HDC carburetor. I had a couple of left over K10 repair kits that I had thrown into a box due to them having the wrong pump diaphragms in them. I figured that it was worth experimenting with them to try and make them useable.
Thanks for the height dimensions 5Terry! I used a grinding well to lightly touch the metal to save a bit of filing. I didn’t go crazy with it though. The metal is really soft on the diaphragm and I didn’t want to distort the material from heat.
I slowly worked at filing in down with the flat file that came in my Oregon raker depth set. Straight light swipes and kept turning the diaphragm to make sure it removed metal evenly. Check the height often with a feeler gauge.
Took about 30 minutes in total. We will see how well the carburetor performs. It should be ok.....I think.
This is definitely more work than it’s worth so I would definitely avoid the aftermarket kits......but if you have one, you can make useable...maybe!
And don’t forget to blow off the metal filings with low pressure air before you put it back in the carb.
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Post by protocol1 on Jun 7, 2021 22:49:19 GMT -5
"Four cycling", is when the saw has a slightly rich air/fuel mixture at WOT no load, and fires every other crankshaft rotation power stroke instead of ignition occurring with each crank rotation power stroke.
The 4 cycling condition is clearly noticeable when the frequency of the exhaust sound shifts to one half of the normal two stroke cycle exhaust frequency at about the same RPM. This is the result of the engine firing every other crank rotation compared to ignition occurring normally with every crank rotation. With the high speed fuel mixture needle adjusted a bit rich to provoke 4 cycling at WOT no load, the saw should revert to normal 2 stroke cycle operation as load is applied during a cut. The excess fuel at WOT, helps prevent the engine from getting to hot quickly since rich fuel mixtures burn cooler and the additional fuel provides more lubricating oil to the engine at WOT.
The saw should not 4 cycle at full load WOT or power will be reduced.
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