Craftsman BackPack Leaf Blower No Spark

welchs101

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from the picture i sent can you tell which variation i have? i mean which numbers 11,25,13,12.

Again from my picture, because i am trying to figure out if the gasket / diaphragm was flipped or something......in one of the pics i labeled the gasket and diaphragm...did i label them correctly?

in on eo the pics i showed the gasket/diaphragm sandwhiched between two metal plates. i dont know the techinical terms, but i am just trying to figure out which metal plate the gasket goes against and which the diaphram goes against. IN one pic you see a metal plate with two pegs sticking out.......is this the metal side that the gasket goes against?
 

bertsmobile1

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Look at what you have there.
The gasket which is soft will have a line impressed into it by the ridge cast into the surface
The other side is dead flat so the diaphragm goes against that because the little pump flaps have to seal against the hole .
Assuming that it had been working before you ripped it apart, you fir the same gasket & diaphragm from the kit as what was fitted in the first place
Different types of plastic are different colour
So if you had a blue diaphragm then you fit the blue one from the kit .
 

StarTech

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Just shaking my head now.

Bert you can't assume anything; unless, you know for sure no one else have been inside the carburetor after the factory assemble it. This is why I posted a link to the IPL. We got people working on these carburetors that has no idea how things goes together. I got local shop techs which should know what they are doing that should never touch a carburetor or anything else but I do make more money off their screw ups so I shouldn't complain. Although it does cost the customer more than it should.

I just did a WT on a Homelite saw where extra pump diaphragms were added. Made it so stiff that the carburetor could not even pump fuel mix after the repair got some age on it.

You must go by the IPL parts list (link posted) as I said before the kits contains parts for several versions of the WYJ carburetors. But I took the time to look it up again. The gasket is item 12. Items 11 and 25 are not used on the 447-1. Now item 13 is the pump diaphragm (must be used). The IPL also shows the order the gaskets and diaphragms goes in. On this carburetor the pump body (the one with the metering needle) is separate from the main body (the one with the rotary barrel). So your pump diaphragm/gasket setup is in the wrong order. It also tells me someone else has already been inside the carburetor.
1642508224120.png
 

Hammermechanicman

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How many times has a piece come in the shop and the gasket on metering side of the carb is on the wrong side of the diaphragm? Always lets you know Wilbur has worked on the carb.
 

StarTech

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How many times has a piece come in the shop and the gasket on metering side of the carb is on the wrong side of the diaphragm? Always lets you know Wilbur has worked on the carb.
More times than I can count on my fingers and toes. :p

Or when they take the short cut of not changing the metering needle. I replaced several last year where they were ringed that was causing flooding. Or those that do forget to set the metering lever thinking they right out of the kit but of even new carburetors needs to checked for this one.
 

welchs101

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thanks. this is kinda what i thought after viewing the diagram you sent. i will reverse the two and let you know if it starts or any change at all.
 

welchs101

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FYI: i think i mentioned in the first post that i got this from my neighbor...well neighbor down the street. A few days after i started this post i saw my neighbor and he asked how it was going with the blower. i said nothing new yet........i asked him if he had done anything to figure out the "spark" issue (because that was the issue i was facing at the time...trying to see if he had replaced the spark plug) and it was at this time he said all he did was "mess" with the carburetor. At the time i did not give it much thought but after someone's last post it was the first thing i thought of.
 

StarTech

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FYI: i think i mentioned in the first post that i got this from my neighbor...well neighbor down the street. A few days after i started this post i saw my neighbor and he asked how it was going with the blower. i said nothing new yet........i asked him if he had done anything to figure out the "spark" issue (because that was the issue i was facing at the time...trying to see if he had replaced the spark plug) and it was at this time he said all he did was "mess" with the carburetor. At the time i did not give it much thought but after someone's last post it was the first thing i thought of.
That is why I said none of us can assume things when we receive equipment. We just don't all the specifics. As a small independent shop I get a lot things that have so called repaired. Some are simply rig jobs, others are done by other shops where the tech has no knowledge of what they are doing. Several years ago when I first moved my shop to where it is now had multiple people wanting me to hire them. After questioning them on things I could see they didn't know what were doing. I had one customer to try one these guys as he said said he knew it all because he was a diesel mechanic. Well the customer brought a couple hundred dollars in parts from me he finally had me to check out his mower. Boy what a mess that guy did to the deck. Six bearings where two were only needed and a missing spacer washer.
 

Hammermechanicman

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You can tell a tech that knows how to diagnose a problem vs one who guesses. For 40 years i had to walk up to machines, diagnose the problem, fix and smooze the customer and do it in a specific amount of time. Star knows the drill. Biggest problem was going behind another tech who half assed a fix or jacked a bunch of adjustments out of spec to compensate for worn parts or was too lazy to do real diagnostic work. Like star said, never assume something is correct. We had a name for those guys. Wilbur.
 

welchs101

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i put the carburetor back together with the correct ordering of parts.......
I put a little gas/oil mixture in where the sparkplug goes and then put spark plug back
It ran for maybe 2 or 3 sec....but longer than before where it "tried" to run.....so i guess its progress.
I dont have much fuel in the tank but i thought i had enough to at least get it going.........
I plan on trying it again later tonight when i have more time but for now just kinda thinking about what my next steps should be

Anyone have any thoughts or suggestions?
 
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