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Post by powerhomelite900g on Feb 15, 2020 12:09:20 GMT -5
Good day chainsaw friends, my completely rebuilt Homelite 995g causes problems in the idle ... For information: Newly sealed crankcase, The two shaft-seals replaced, Carburetor received new carb kit and was cleaned in an ultrasonic bath ..., Many small parts such as spark plugs, gasoline filters etc. have all been replaced!
The problem: The saw fluctuates in idle and dies after a short time. This cannot be changed by settings, even if I set the idle very high, it still dies. Even if I tip the saw to the side, the motor dies. At full throttle there are no problems!
There are 2 videos in the following links below!
I hope you can help me!
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Post by sweepleader on Feb 15, 2020 12:34:05 GMT -5
If the mixture screws don't function, I would think it is a carb problem. That would include vacuum leaks and hose leaks. I know you said you have been through those things but it might be worth your while to seriously look again for something that was overlooked. The engine sounds ragged in the videos, again pointing me toward the carb. It's also possible that the ignition is not up to snuff, spark weak and not doing its job.
What do the rest of you HOH'ers think?
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dynodave
Saw Builder
equal opportunity GEARHEAD
Posts: 246
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Post by dynodave on Feb 15, 2020 12:54:12 GMT -5
I seem to recall an in depth discussion in a thread on Tillotson HL carbs. My 707D also runs a HL117 so another tear down and precision inspection for the difficulties that had we had been warned about (Leon?) may get you to normal running. I would have loved to find a big boy also but 707D .404/30" will be the last of that kind of saw for me. good luck
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Post by powerhomelite900g on Feb 15, 2020 13:05:17 GMT -5
I also tap the carburetor, the engine has been carefully overhauled. I can not imagine that she still draws false air somewhere ... It also has insane compression!
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dynodave
Saw Builder
equal opportunity GEARHEAD
Posts: 246
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Post by dynodave on Feb 15, 2020 15:32:53 GMT -5
I also tap the carburetor
meaning unknown?
The HL failure is within the carb layers and gaskets or diaphragm... not external
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Post by edju1958 on Feb 15, 2020 16:09:25 GMT -5
The reason why he tapped the carburetor was to free something that might be sticking internally.This is something that we did on the farm to an old float carb to free a sticking float,or dislodge a piece of dirt.It seldom if ever worked,but this was the farmer mentality of 75 yrs.ago.I guess you'd have to be an old farmer or at least be with one to understand.The other thing was to take the needle valve out of the carb & spit on it & put it back in hoping it'd work.Lol Ed
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Post by sweepleader on Feb 15, 2020 16:56:02 GMT -5
I seem to recall an in depth discussion in a thread on Tillotson HL carbs. My 707D also runs a HL117 so another tear down and precision inspection for the difficulties that had we had been warned about (Leon?) may get you to normal running. ... Yes, now that you mentioned it, Leon has several videos on this carb and some of its problems. A search of, "tillotson hl carburetor rebuild leon" turns up a lot of info.
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Post by onlyhomelites on Feb 15, 2020 22:56:32 GMT -5
It sounds like it is loading up...running too rich. When you throttle it up after an idle, it's puffing a lot of smoke. Can you lean the low side out? If it won't lean out, using the low speed screw, it's likely leaking by the needle. It could be a weak inlet lever spring or an inlet lever set a bit too high. Was the carb pressure tested on assembly?
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Post by powerhomelite900g on Feb 16, 2020 5:32:21 GMT -5
Unfortunately, it cannot be corrected by settings, even if I screw L further out (leaner) it does not run better ... I didn't measure the carburetor pressure ... Does any of you have a new HL carburetor for sale?
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Post by powerhomelite900g on Feb 16, 2020 5:32:57 GMT -5
I have currently installed the very early HL-62-A ..
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Post by edju1958 on Feb 16, 2020 8:37:56 GMT -5
By turning the screw out (counterclockwise) you are making it richer.You must turn the screw in to make it leaner (clockwise). Ed
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Post by powerhomelite900g on Feb 16, 2020 12:07:05 GMT -5
Ohh, I'm embarrassed now Maybe she just ran to fat all the time ... Because she smoked even when she was hot.
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Post by sweepleader on Feb 16, 2020 13:48:35 GMT -5
No worries about that oops, just post a video of it running right and all will be forgiven!
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Post by powerhomelite900g on Feb 16, 2020 14:02:08 GMT -5
Okay: D Well then, let's hope it was because of this, but the fluctuations in speed make me startled
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Post by powerhomelite900g on Feb 16, 2020 14:18:37 GMT -5
Can someone give me a basic attitude? I have died, found no information ...
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Post by 5terrysupersaws on Feb 16, 2020 20:30:39 GMT -5
Can someone give me a basic attitude? I have died, found no information ... " Basic attitude " -- Translation = Starting point of the carburetor mixture screws ? -Idle fuel mixture needle ( on the left of carb. ) = 3/4 turn out from lightly seated -Main fuel mixture needle ( on the right of carb. ) = 1 1/4 turns out from lightly seated This information and adjustment procedure can be found in the Homelite service manual 4th edition part 1. The 995 G section begins on page 72, carburetor section on page 73. Link to the Service Manuals in the thread below; houseofhomelite.proboards.com/thread/5563/homelite-chainsaw-shop-manuals
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Post by tjthechainsawmech on Feb 16, 2020 22:16:20 GMT -5
If your settings are still weird be sure to pressure test the carb. They are prone for warping at the pump base plate and will pull in air. Also I've found that stretching the meter spring a tad helped Alot with loading up. Been long enough since I've had one apart that I can't remember is there's welch plugs or not....if there are any then re-glue them with clear nail polish. Leaking welch plugs will cause carbs to run pig rich and lean as well.
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Post by powerhomelite900g on Feb 17, 2020 3:47:27 GMT -5
Thanks for the many tips! Yes 5terrysupersaws I meant that, thanks for that. I will try again to set the carburetor correctly ... I don't know how to do a vacuum test on a carburetor ... I also have no special tools for this.
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Post by powerhomelite900g on Feb 17, 2020 12:47:17 GMT -5
So I tried again to adjust the carburettor, unfortunately without success. I'm getting tired of the damn thing ... Will have to switch the ignition again so that I can get more fuel ... The saw choked when accelerating and readjusting with the H screw was unsuccessful ...
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