1. Disconnect battery. Positive and negative both for safety. Socket set.
2. Disconnect push terminal wire from fuel shut off solenoid on bottom of carburetor. Pull by hand.
3. Remove hose clamps from breather tube. Pliers.
4. Remove breather tube. Pull by hand.
5. You may remove the air filter housing lid, wing nut, gasket and air filter to aid in removal and install of carburetor. I did not for this procedure.
6. Remove hose clamps from fuel hose on right side of carburetor going into the metal fuel line. Pliers.
7. Carefully twist the fuel hose to break it free from the carburetor and metal fuel line. By hand. (if really stuck, use pliers that fit well around the hose and carefully apply light pressure while turning the fuel hose with the pliers.) It should break free using this method. Take extreme caution or have new fuel line ready to replace.
8. Remove the two mounting nuts securing the air cleaner box AND carburetor in place. Take care as there is a small washer and lock washer for the carburetor ground wire on the right side stud.
9. Gently pull the air cleaner and separate from the carburetor, set aside.
10. Make sure the throttle is in the full choke position, then carefully slide the carburetor off the studs. The throttle and choke cables will still be connected.
11. Carefully tilt the carburetor to remove the throttle and choke cables one at a time.
12. Carburetor removed. Clean all gasket surfaces extremely well. Both sides of the carburetor, the engine intake to carburetor surface and the air cleaner to carburetor surface. On the metal surfaces, very light pressure with a scotch bright pad should do the trick. A little carburetor cleaner may help. Use your fingernail or a plastic scraper to remove excess gasket material from non-metal surfaces.
13. Disassemble carburetor by using an adjustable wrench, removing the fuel shut off solenoid. Take care here as fuel will likely leak from the carburetor.
14. Using a small razor blade and extreme care, scrape the excess gasket material from the ring type gasket area at the base of the threads on the fuel shut off solenoid. DO NOT scrape towards yourself as you could injure yourself or gouge the sealing surface. Install new gasket and rubber stop onto fuel shutoff solenoid. Set aside.
15. Twist the float bowl by hand to release it from the carburetor.
16. Clean the bowl thoroughly with carburetor cleaner and wipe away any excess debris. Set aside.
17. Carefully remove the float retaining pin by tapping one end very lightly with a small tool and use needle nose pliers from the other end to pull it out. Set it aside. Carefully remove the float and needle valve together. Set aside the old needle valve. Clean the float and make sure there is zero liquid inside of it and no signs of cracks or holes. It MUST float. Set aside.
18. Saturate the insides of the carburetor with carburetor cleaner. Using a very fine wire(bread tie in my case), run the wire through the tiny jets and ports in the carburetor. IF you have a straw, some times you can force the carburetor cleaner through the small orifices with the concentrated jet from the cleaner. Once satisfied that all orifices have been cleaned, saturate once more with carburetor cleaner to rinse out any left over debris. Ensure the throttle and choke plates operate fully by opening and closing.
19. Clean old float bowl gasket material from carburetor.
20. Install new needle into float.
21. Holding carburetor upside down, install float assembly into carburetor. Carefully press in the retaining pin by hand.
22. Still holding carburetor upside down, set the float bowl gasket into place on the carburetor followed by the float bowl.
23. Using the fuel shutoff solenoid with new gasket and new rubber stop, begin threading it into the hole in the bottom of the float bowl. Tighten finger tight. Then very carefully tighten to specified torque or until a snug resistance is felt. DO NOT over tighten! This could cause severe damage to the carburetor and require the entire carburetor to be replaced. Small tools are best!
24. Install new gasket for carburetor to intake/engine.
25. Carefully install the throttle and choke linkages into the carburetor.
26. Slide the carburetor onto the studs, while working it into place, insert and clamp the fuel hose, connecting the carburetor to the metal fuel inlet line.
27. Install carburetor to air cleaner gasket on to studs.
28. Install air cleaner box onto studs. (reinstall remaining air cleaner components if removed in earlier steps.)
29. Install the ground wire, washer, and lock washer.
30. Install the mounting nuts. Finger tight. Torque to spec.
31. Install new breather tube with clamps.
32. Install push terminal wire onto bottom of fuel shutoff solenoid.
32. Remove governor spring by positioning the throttle to a position with little/least resistance on the spring. Use pliers to carefully pry it out and then again use the pliers to install the new spring.
33. Ensure all work is complete and fittings are tight. Check for fuel leaks.
34. Reconnect positive and negative battery terminals.
35. Start and enjoy! It will take a few moments longer than usual to start after disconnecting the fuel line and draining the carburetor.
For me, it started up in just a few moments of cranking and is now running extremely well! No surging, no popping or backfires, no stalling. Works well in all throttle positions. Starts right up with little to no effort. Job well done!

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Bowl gasket damaged & hose rotted

Fred - September 13, 2016

Tool Type

Lawn Tractor

Difficulty

Medium

Time

15-30 minutes

Tools Used

Screwdriver, Pliers, Socket set

Parts Used

Removed carb and replaced gaskets, removed breather hosed and replaced with new one.

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Thanks for voting and helping fellow customers!

Hose,​ Breather 12 326 03-S

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Surging Engine with stalling, unusable

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Bowl gasket damaged & hose rotted

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Hose, Breather 12 326 03-S

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