Genuine Husqvarna replacement part, this part is sold individually. The 503939601 Air Purge does just what the part name says. It purges the air out of the carburetor. Then it forces fuel from the fuel tank and fuel line in to the carburetor.
Remove top cowl from saw --- remove air filter from carburetor --- disconnect fuel lines from purge with pliers --- remove damaged purge by pinching keeper tabs --- snap new purge in place --- connect fuel lines --- install air filter & cowl --- voila\'
1. Remove chain and bar( for easy maneuverability), empty gas in tank, then top cover, followed by handle and throttle grip. The throttle has to be disconnected from carb, and you have to spin the linkage to remove because it does not come straight out.
2. You can choose to remove carb, I was able to do repair without removing, prob
... Read moreably more difficult, but might have saved a little time. I removed return line and fuel lines and prime bulb from saw, followed by grommets. To remove fuel line you have to open gas tank and pull out filter and fuel line with your 90 degree pick. Remove filter and hose, replace with new.
3. When I replaced grommets and hose, I put a little oil on them to make things go on a little easier. I found it is easier to install grommets on hose first and then install grommets on saw. You can always push and pull hose through.
4. Once all hoses are on and secure, reinstall your filter on line and replace inside tank. I cut about two inches off the tank line before installing filter, just because it seemed a little long, your choice. I only had one line that was bad, but I figured while I was replacing one, might as well do them all, the others are probably going to fail soon.
5. In order to replace exhaust screen, you will have to remove chain break handle, two hex head bolts, slide screen out, slide new one in and done.
6. Once installed, I reassembled everything in the reverse order it come out. Chain brake handle, main handle then throttle cover, remember to install throttle linkage, you have to spin it to get back next to the carb, this can be a little tedious, but make sure it is where it needs to go before bolting main handle on, or you have to take it apart again(my mistake).
7. After throttle cover, replace your top cover, and chain and bar, add gas and your good to go.
Removed engine cover.
Used small screw driver to depress the tabs on air purge.
Pulled off both fuel lines from air purge, paying attention to which one connected where.
Attached fuel lines to new air purge and snapped it in place.
It was a very easy and straightforward repair.
Did you find this story helpful?
Thank you for voting!
Was leaking fuel around the fuel lines that go from the gas tank to the carb.
1 removed outside plastic covers
2. Removed dirt and fuel from around the motor.
3 removed fuel tank
4 removed old fuel lines and grommets from gas tank
5 replaced fuel lines and grommets Be clean entire trimmer.
6 hooked fuel tank back up attached plastic covers.
7 filled fuel tank and checked for lea
... Read moreks and started trimmer. Everything works great just like new.
Read less
Did you find this story helpful?
Thank you for voting!
Purge cracked would not prime, upon inspection throttle cable appeared severely frayed near the carb, after removing throttle cable, spring was found broken
The purge is fairly simple to replace, it\'s kinda like a snap tight. I broke the old one taking it off, which informed to be careful putting the new one in. I put a little lithium white on the two ears that snap it into place. That helped go in without me putting to much muscle on it. The throttle cable and spring was not so simple and r
... Read moreequires a bit of patience. The main thing is pay close attention to how you take it apart. Everything has its place it just may take a moment to figure it out. I advise that if you need to replace the cable, buy the spring as well. Even if it\'s not broken that way you can leave it assembled till your parts come in and taking it apart is fresh on your mind.
1. Took pictures before I took it apart.
2. Removed all the plastic.
3. Removed the tank.
4. Replaced the hoses and filter on the tank.
5. Replaced the fuel primer on the main unit.
6. Mounted the new hoses to the new carburetor.
7. Removed the old carburetor.
8. Installed the new carburetor and g
... Read moreasket to the trimmer.
9. Reinstalled the tank and all the plastic.
10. Started the trimmer and made adjustments to the carburetor.
11. Installed the carburetor stops to the Jets.
Read less
Did you find this story helpful?
Thank you for voting!
Chain saw would start but would die when I gave it gas.
1. Pull out the fuel filter with a piece of a wire shaped like a hook. Changed out the filter. Just pull off the fuel hose.
2. Put in the new spark plug. (used a spark plug socket)
3. Popped off the air purge (used pliers). Undo two small hoses first. Snapped the new one on and reconnected both hoses.
Replaced the primer bulb (air purge), and the fuel line from the carburetor to the tank. Have to remove the cylinder cover and air filter to access fuel lines. Getting the new fuel line into the tank beside the carburetor is the most difficult part. The fuel line is spiraled, or coiled from the factory and is this way on purpose so it
... Read morecan flop back and forth inside the tank regardless of what position the chainsaw is held. This creates a bit of an issue getting the fuel line into the small bushing it goes thru in the tank. A little ingenuity and patience will get it done. I used the hemostats and a very long piece of wire to pull the fuel line thru into the tank. The hemostats also helped out greatly getting the new fuel line in place on the nipple on the carburetor because the throttle linkage does not leave enough room for fingers.
Removed the old handle half that was left and the right side that is attached to the upper handle . Removed the torsion mount springs and the air filter housing . Transferred all the necessary parts then installed the new right half with the upper handle and then the throttle lock and trigger with the return spring which was slightly conf
... Read moreusing when the old parts were missing so I used the parts breakdown from e replacement for the placement and finished assembling the rest and the repair was successful thank you, all the part were right the first time around
Read less
Did you find this story helpful?
Thank you for voting!
< Prev
1
2
3
Next >
Model Cross Reference
This part works with the following models:
ERP Number: ERP9282918
Manufacturer Part Number: 503936601
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
✖
Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
✖
[{"position":0,"name":"Home","title":"Home","url":"/"},{"position":1,"name":"Light or Bulb","title":"Light or Bulb","url":"/parts/lawn-and-garden/brush-cutter/lights-and-bulbs/"},{"position":2,"name":"503936601","title":"503936601","url":""}]
