Question about Toro Lawn Mower With Toro Power Tools
Govener and linkage seem to be ok but engine runs wide open from the start.
You have carburetor problems. Chances are the diaphragm needs to be changed and the carb. needs a good cleaning. If you need tips on carb. cleaning, let me know.
Posted on May 29, 2009
Was gasoline left in the tank during off season? Sometimes gas will break down and clog the jets in the carb. The priming bypasses the carb so when you put fuel in by pumping the bulb it runs, but dies becasue no additional fuel is coming through the carb after the primed fuel is burned off. Sounds like you need to clean the jets in the carb and in the future, use Stabil in gasoline to keep it from breaking down.
Posted on Jun 30, 2009
SOURCE: mower will not start
Hi and welcome to FixYa. I am Kelly. Sounds like your in need of a serious carb cleaning session:
You engine parts manual is here: http://www.briggsandstratton.com/maint_repair/manual_and_more/docmanualdetails.aspx?showpdf=ms2143_B_LO.pdf
Now lets go through carb cleaning:
Before you start.... if you have a digital camera take "close up" PICTURES of the linkages and springs attaching to the carb. If this is your first time you will be so glad you did. You can always delete them later if you don't need them. :)
Here is what you need to do:
1. Fuel selector off
2. Remove float bowl mounting screws and nut
3. Localte the Air fuel Jet on the side of the carb and count the number of turns it takes to close the Jet adjustment until it is just snug.
4. Remove the Jet / Orifice in side of Carb (spring on screw stem)
5. Using a catch fuel container turn on the fuel selector. Fuel should flow at a good rate. GENTLY lift the float assy level and make sure fuel flow shuts off. When you drop the float again fuel should flow.
If you do not have fuel flow at this point the needle and seat will need to be inspected. Fuel selector OFF.
(The following procedure is to be done only if there is no fuel flow with fuel selector on.)
a. Remove the float pivot pin.
b. Drop the Float down (The needle will come off with the float. NOTE the position)
c. Inspect the tapered rubber of the needle valve It should be pointed. If it is not pointed then the rubber tip is stuck inside the seat.
d. Clean the seat hole ONLY if obstructed. (Easily damaged)
e. FUEL Selector on then off fuel should rapidly flow through the needle seat.
f. Renistall Float and needle making sure to get the pivot / hinge pin installed correctly
g. Fuel selector ON. Raise and lower float checking for free movement with fuel flow when lowered and stopped when the float is raised level.
6. If there still is no fuel flow at this point remove the fuel hose from the carb and check fuel flow. If no flow check that gas tank exit hole, fuel filter (if installed) and the selector valve assy for obstructions.
FUEL FLOW IS GOOD
NOTE: If you have carb cleaner spray it into the side needle jet hole.
7. Install air fuel mixture needle jet in the side of the carb. Turn until closed and then back of the same number of turns it took to initially close it snug before removal.
8. BEFORE you install the float bowl inspect the bowl nut. There are holes in the side of the nut where it screws in to the bottom of the carb that must be clear. (could be no holes in yours)
9. Install Float bowl mounting screws and nut. Check for leaks.
10. Test engine.
That should do it.
NOTE: This engine was made with 2 different carbs. One had a choke the other had a primer bulb. If the primer bulb has a hole in it the engine will start then die after a few seconds.
Thanks for using FixYa.
Posted on Apr 23, 2010
It's not that hard. I've never done it on my Toro GTS 5.0, but I have done it on a Briggs and it's pretty much the same. Start by removing the 10mm bolts around the perimeter of the engine shroud. DON'T remove the 4 top bolts on the recoil housing. You might have to remove the fuel tank first. Drain it, then loosen the 2 8mm screws and lift it straight up. No need to disconnect the fuel line, just set the tank aside. After removing the 10mm bolts, the shroud should lift right off. Flip it over and you will see the recoil pulley. Remove any leftover cord from the pulley. Now you need to wind the pulley against the spring in the direction it goes when you pull the cord. It might wind 2 or 3 revolutions but don't overdo it. Now you will need some sort of clamp to hold the pulley in place as you line up the slot in the pulley with the opening where the handle goes. Next, feed the new cord through the opening and into the pulley and tie a knot to keep it from slipping out. Carefully release the clamp and let the pulley slowly wind the new cord onto itself. Finally, attach the handle on the other end of the cord and test it. If you can pull the handle and the cord comes out and it retracts normally, re-install the shroud and tank.
Posted on Oct 03, 2010
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