okie
Saw Builder
Posts: 201
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Post by okie on Feb 28, 2021 16:07:33 GMT -5
Appears you are having some of my luck now days. I've found it usually will get better if you will just stay persistent. You may have these but anyway: Here is couple links one will show the gas and air passages of the HDC and the other is a video of Leon flogging a HDC. Noticed that most of the online Walbro links is 404 error today. Hope they don't have the plague permanently. Walbro Carb HDC carb service manual IPL showing the gas and air channels, etc LINK www.walbro.com/wp-content/uploads/2016/01/HDCseries.pdfvideo of leon work on a HDC www.youtube.com/watch?v=n16qcMctvnw&feature=emb_titleJust noticed this happens to be the check valve video. Leon has another good video about checking a leaking HDC and the cover warped and not sealing and a cure for and other things.
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Deleted
Deleted Member
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Post by Deleted on Mar 7, 2021 9:05:41 GMT -5
Update: Third carb is the trick. Just took it outside and played with hi lo settings and it idles and revs up perfectly. Thanks for your all of your time and advice okie. I'm playing with a 925 now and will have questions on it later.
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okie
Saw Builder
Posts: 201
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Post by okie on Mar 7, 2021 12:45:02 GMT -5
Update: Third carb is the trick. Just took it outside and played with hi lo settings and it idles and revs up perfectly. Thanks for your all of your time and advice okie. I'm playing with a 925 now and will have questions on it later. Good to hear you got it coming along. The ez's are worth the time spent, good saws when correct, but little harder to work on due to being compact. Try to set the H jet just little rich (1/8-1/4 turn out), the EZ will really scream when the H jet is set a max rev's and can overheat in a long cut due to being little lean. Also let the saw warm up good before final H adjust and have the air cleaner clean and on the saw. Also if the L jet is set in just little too much on some EZ saws will be slow coming back to a slow idle and the clutch/chain will keep running longer when off throttle, but sometimes a weak centrifugal clutch will also cause the idle too have to be reduced really low. You can usually tell if it's the L jet by listening to the rpms when you come off the trigger, the rpms do not almost immediately drop, just taper off kinda slow if the L jet is in just little to far in CW causing the clutch to stay en-gauged. Did the 3rd carb test like I indicated that on pg2 of those test instructions step IV that opening the L jet did not drop the pressure, only opening the H jet will drop the pressure? Reason I ask is lst few days I've tested about 6 HDC that ran good after testing per the link EXCEPT opening the L jet per step IV had no effect on the pressure. I'm talking about the test procedure at this link; (that I posted earlier) houseofhomelite.proboards.com/thread/10216/homelite-procedure-carburetor-pressure-testingAlso did you figure out why the 2nd carb had the slow leak per your post at Feb 28? ? Get yourself a storage box for the mityvac and start storing different sizes of vac tubing, adapters for different size tubing etc. You will find it handy for testing automotive stuff if you piddle around much. Thanks for coming back and letting us know about your latest. Where did you come up with carb #3?I'm not familiar with the 925. Probably get more ideas if you post a new thread about the 925.
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Deleted
Deleted Member
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Post by Deleted on Mar 7, 2021 16:34:52 GMT -5
I noticed the same thing about pressure not dropping when low jet is open and high is closed. Doesn't that mean the low is dependent on the high for fuel?
I couldn't get the high speed to close on the second carb. I had no control over the flow what so ever. I tried cleaning but nothing was working. I got tired and bought another one. It would be funny if the person who sold it to me was reading this. The third one was full of what I think was old dried up fuel, crusty and disgusting. A needle had lots of rust around the tip also. I scraped and scraped everything every where. All cleaned up with new gaskets and it leaks a lot when pressure tested. Tried covers from other carbs and it holds well enough.
I'll take your advice on carb settings tomorrow when I dive into some logs. Thanks again.
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okie
Saw Builder
Posts: 201
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Post by okie on Mar 7, 2021 17:56:55 GMT -5
Probably, I do not know for sure about the fuel routing and never bothered to look at the Walbro exploded views because the first one that I tested per those procedures I knew was a good running carb so I just ignored the L jet test and noticed all the others I kitted tested the same and ran ok.
A small engine mechanic friend gave me a pile of junk sometimes back and these HDC and some others were in a bucket, he was smart and just quoted his customers new carbs and they had to buy and bring the new carb to him to install. If it did not run then it was not his money in the machine. SMART MOVE on his part. (and he did not like to use the clone cheap carbs)
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okie
Saw Builder
Posts: 201
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Post by okie on Mar 11, 2021 10:34:46 GMT -5
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