|
Post by xl130 on Dec 1, 2021 13:20:57 GMT -5
I have the cursed 151b. Runs like crap.Has anyone figured out a good fix for these carburetors? Is it possible to buy a hi speed nozzle that does not have the check valve drilled into them?
|
|
|
Post by edju1958 on Dec 1, 2021 13:27:29 GMT -5
You can eliminate the 151 entirely & put a fully adjustable carb on the 925 like I did.
|
|
|
Post by xl130 on Dec 1, 2021 13:30:20 GMT -5
Yes I suppose that’s an option. I just hate to steal a carburetor off of one of my “project” saws but I will if so need to.
I popped a 56A in it and it runs awesome. But that carb needs to go back in my 922SL…..
|
|
|
Post by edju1958 on Dec 1, 2021 13:42:29 GMT -5
AnHS26A is what I used,but needed a grommet for an XL-923 to make it work.I think an HS71 might work too.I absolutely hate the fixed jet carbs.You might be able to find a carb cheap on Feebay,or just put the word out here,or on AS.
|
|
|
Post by bobby167 on Dec 1, 2021 14:31:04 GMT -5
if you haven't, check the TILLISON web site for information. I have used it to locate the parts I needed. Lots of good information there.
|
|
|
Post by bobby167 on Dec 1, 2021 15:25:09 GMT -5
FYI Another option, if your going to replace the carb, is a post on this site, from undee70ss, is Homelite tec service bulletin # 191-002. It was posted Dec 19 2017 under "which carb for xl-925".This shows the Walbro WJ27 carb as replacing the HS 151.
|
|
|
Post by xl130 on Dec 1, 2021 16:36:08 GMT -5
I think I personally will not be getting a different carb than what I currently have in one of my part or project saws. I see a HS120A in a blown up 922 I have so that is probably going to end up going in the 922 runner that the 151 was in.
To be honest I’d like to keep the 151 in it and just pop the fixed nozzle out and replace with a typical nozzle that is properly sized.
I may also just trying to replace the nozzle with a NOS. I’m fine with it as long as it can be tuned. This one is all over the place. It’s rich then lean! Not sure exactly what’s in the nozzle that could go “bad”. Possibly the carburetor is defective in some other way though which would explain why it was shelved and is still in such great shape!
I see TJ had the same problem with a 925 last year. I wonder how he made out with it?
|
|
|
Post by 5terrysupersaws on Dec 1, 2021 16:51:49 GMT -5
Non-drilled Main Nozzle Check Valves are available for purchase from reputable vendors Jim and Leon .
Part# ^ ( $ % #
|
|
|
Post by fossil on Dec 1, 2021 22:52:59 GMT -5
I have the cursed 151b. Runs like crap.Has anyone figured out a good fix for these carburetors? Is it possible to buy a hi speed nozzle that does not have the check valve drilled into them? That's not a check valve, that's a governor. A lot of users like to disable them but I have never come across one that was bad. The check valve in the 151 carbs looks like a brass plug in the metering chamber and they do go bad giving all kinds of weird symptoms. the PN for that valve is 363-544. I've had good luck cleaning them up by removing the high speed mix adjust needle out, which is important, and with an appropriate flat punch tap the valve into the venturi. Clean it well with something like Sea Foam and then test it to make sure it still seals and put it back in from the metering side.
|
|
|
Post by xl130 on Dec 2, 2021 4:57:58 GMT -5
The intent of the photo was to show the model number. Tillotson doubled down on this model and installed a drilled nozzle as well as the rattle ball governor. I guess the governor did not protect the engine enough! That’s surprising because I have other saw models with the rattle ball and I had to block them off because they hardly ever stopped four stroking.
I purchased a regular non drilled nozzle from Leon. We will find out if that cures this carb.
|
|
|
Post by xl130 on Dec 2, 2021 8:36:59 GMT -5
I have the cursed 151b. Runs like crap.Has anyone figured out a good fix for these carburetors? Is it possible to buy a hi speed nozzle that does not have the check valve drilled into them? That's not a check valve, that's a governor. A lot of users like to disable them but I have never come across one that was bad. The check valve in the 151 carbs looks like a brass plug in the metering chamber and they do go bad giving all kinds of weird symptoms. the PN for that valve is 363-544. I've had good luck cleaning them up by removing the high speed mix adjust needle out, which is important, and with an appropriate flat punch tap the valve into the venturi. Clean it well with something like Sea Foam and then test it to make sure it still seals and put it back in from the metering side. I’ll try cleaning the nozzle. Makes sense that you should be able to clean it and reuse if it isn’t deformed during the removal. Thanks for the tip !
|
|
|
Post by fossil on Dec 2, 2021 9:16:22 GMT -5
That's not a check valve, that's a governor. A lot of users like to disable them but I have never come across one that was bad. The check valve in the 151 carbs looks like a brass plug in the metering chamber and they do go bad giving all kinds of weird symptoms. the PN for that valve is 363-544. I've had good luck cleaning them up by removing the high speed mix adjust needle out, which is important, and with an appropriate flat punch tap the valve into the venturi. Clean it well with something like Sea Foam and then test it to make sure it still seals and put it back in from the metering side. I’ll try cleaning the nozzle. Makes sense that you should be able to clean it and reuse if it isn’t deformed during the removal. Thanks for the tip ! You won't deform it by tapping it out. The issue is it needs to be clean and the nitrile flap which moves up and down in the valve needs to be in good shape or fuel will flow out the nozzle continuously. The saw will flood and be impossible to tune. The nozzle will look something like the pic in the attached link. You will be able to see the nitrile flap if it's still intact through the hole with the bar across it. app.box.com/s/wlp87b9xv6as9qjvd269wozdj7hasous
|
|
|
Post by xl130 on Dec 2, 2021 9:22:02 GMT -5
Sounds like a good topic for my next YouTube video.
|
|
|
Post by fossil on Dec 2, 2021 12:38:55 GMT -5
To test the valve when you get it out, slip a piece of fuel line over the bottom end and suck and blow through it. It should be free in one direction and air flow should stop in the other direction.
I can't remember which way is what so I'm playing out the old people card.
|
|
|
Post by 5terrysupersaws on Dec 2, 2021 14:37:07 GMT -5
That's not a check valve, that's a governor. A lot of users like to disable them but I have never come across one that was bad. The check valve in the 151 carbs looks like a brass plug in the metering chamber and they do go bad giving all kinds of weird symptoms. the PN for that valve is 363-544. I've had good luck cleaning them up by removing the high speed mix adjust needle out, which is important, and with an appropriate flat punch tap the valve into the venturi. Clean it well with something like Sea Foam and then test it to make sure it still seals and put it back in from the metering side. I’ll try cleaning the nozzle. Makes sense that you should be able to clean it and reuse if it isn’t deformed during the removal. Thanks for the tip ! No check valve per say in the stock drilled main nozzle, just a screen. More info; houseofhomelite.proboards.com/thread/10491/xl-925-carb-question
|
|
|
Post by kevinm1980 on Dec 7, 2021 8:31:46 GMT -5
One of my sxl-922 had a 151 that I just couldn't get to cooperate.. So I did exactly what edju1958 did and put a hs26 in, runs nice now
|
|
|
Post by blythkd on Dec 7, 2021 12:47:23 GMT -5
I’m fine with it as long as it can be tuned. This one is all over the place. It’s rich then lean! Has this saw passed the tip test, ruling out crank seals? Probably more than likely the carb but seals can cause problems too.
|
|
|
Post by xl130 on Dec 7, 2021 13:10:45 GMT -5
Yup good on tips. Runs awesome off a good carb. It’s definitely something wrong with the 151
|
|
|
Post by blythkd on Dec 7, 2021 20:33:00 GMT -5
Ahhh, I just reread your posts and see where you stated a week ago that it ran good on a good carb. I need to pay attention better.
Sounds like you're down to fixing the crapper carb or finding a better one.
|
|
|
Post by xl130 on Dec 7, 2021 21:28:22 GMT -5
Yes I was think the same as you and I suspected an air leak but have also encountered this type of behaviour with saws that have bad inlet needles and other carburetor problems.
Knowing that these carbs have a bad rep I decided to rule it out by popping in a known good carb. Sure enough it ran really good so I guess I try the new nozzle from Leon.
If that doesn’t cure it I’ll have to steal and rebuild one from a 922 carcass I have.
|
|