Question about Toro Lawn Mower With Toro Power Tools

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No fuel to cylinder

Cleaned and dried gas tank, removed and cleaned carb bowl and brass bolt. Bowl fills, bolt is clear, engine fires with starter fluid but does not seem to get gas. What next? rebuild carb? or am I missing something.

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The fuel flows throuth tiny holes in the brass bolt which serves as the metering device or "jet", the fuel flows up through the hollow center of the bolt where it mixes with air and is sucked into the intake manifold, through the intake valve and into the engine. I suspect the brass bolt's tiny hols are plugged or partially plugged.

Posted on May 27, 2010

Testimonial: "The jet/bolt was cleaned and the jet was clear, turned out to be a faulty carb body and a loose key to the magneto. Good info, though."


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Wont firi over been sitting for a while

The following applies to pretty much any carbureted engine.
You need three things for an internal combustion engine: Fuel, Spark, and Air.
The first place I'd start is with the spark plug.
Remove the plug. With the plug wire attached to the plug, ground the electrode (threaded part) against the metal frame and crank the engine again. Check to see if there's a spark between the electrodes. If there is, then you've established spark - for that cylinder and only that cylinder. If you have spark in all cylinders, next thing I'd check is fuel.
I would start at the fuel inlet of the carb. Pull off the fuel line and make sure fuel can get there from the tank. If not, you have a plugged filter or debris in the tank that's preventing the fuel from reaching the carb. Clear the obstruction and try starting.
Still won't start? There is the possibility that gas in the carb has dried out. That can plug ports, keep the float from working, etc. Best fix is a carb cleanout.
On some bikes, you can check to see if the float is working. There is sometimes a drain valve in the sediment bowl (on the bottom of the carb). Open the drain and see if gas comes out. If it doesn't then there is no gas in the carb. If no gas comes out, then it's likely that your float is stuck.
If you don't have a drain valve, on some carbs, there is a "nut" on the bottom of the sediment bolt. It's actually a bolt that holds the sediment bowl to the carb. Loosen the bolt until your bowl is free to move. If no gas comes out between the bowl and the carb, your float is stuck. If it does come out, then it could be the needle that meters gas to your engine. Work the throttle a few times and then try again. With the gas in the bowl, working the throttle moves the needle in and out and can clear out enough "varnish" to let gas get into the cylinder.
Again, try starting it. Still no joy, pull the plug and see if it's wet. If it's wet, then it has been getting gas - too much, in fact, but that's because it hasn't been firing. You're back to two issues:
Either the needle isn't closing and too much gas is getting into the cylinder or you don't have spark. If it's the first, then you need to pull the carb for that cylinder, clean it out and re-install. If it's the second, you have an intermittent wiring problem which is going to be a lot of fun to find.

Dec 27, 2013 | 2008 kawasaki Vulcan 900 Classic

1 Answer

Engine starts, but stalls a few minutes later. Put new oil in. Bottom of mower is clear.

The carb is probably dirty and ingesting debris or water from the bowl into the main jet at different times. First, I recommend installing an inline fuel filter on it. Drain the old gas. Remove the bottom bowl on the carburetor and check for debris/water and clean it . Also be SURE to clean the brass bolt that held the bowl on the carb as it functions as the main jet of the carb. Clean the bottom hole and the holes on the sides near the top.Reinstall, not forgetting the felt washer that goes between the head of the bolt and the bottom of the bowl (on the outside of course). Use nothing metal to clean the brass bolt. Add fuel sytem cleaner (I like Chem Tool's berryman B-12) to your fuel can to aid in cleaning the inside of your carburetor. Make sure your spark plug is clean (brown, not black) and the air filter is clear. Post back if needed.

Aug 13, 2011 | Garden

1 Answer

Poulan pro 6.5 it starts then automatically shuts down like theres a safety feature stuck or hoding it back?

Try this. Drain the gas tank. Remove the aluminum carburetor bowl. It is held on with a small brass bolt. Don't lose the washer between the bolt and the bowl. Check in the bowl for water and debris. Clean it. Then, inspect the brass bolt. It doubles as the carb's main jet. There is a small hole in the bottom and even smaller holes along it's smooth sides near the top. Use NO metal objects to clean any of these holes. Carb cleaner works well here. Those holes are a precise size and need to stay that way. Make sure it is nice and shiny and clean. Reinstall it and your fuel flow problem should be fixed. I advise installing some type on inline fuel filter on ALL small engines to combat this problem. Old, dried fuel will cause this short-run issue after startup and cleaning the main jet will solve it, providing everything else is OK.

Jul 04, 2011 | Poulan Garden

1 Answer

Hi, I have a Craftsman Eager-1 5.3 3-in-0ne solid state enigine lawn it used but in almost new condition. worked great cutting 1 1/2 ft of very wet grass for a few hours (couldn't get to it...

Drain the fuel or when you remove the float bowl bolt (also the main jet), then hold up on the float to keep the needle on the seat so gas won't go everywhere. When you have that brass bowl bolt off, clean it! Use nothing metal on it. Pay close attention to the small hole in the bottom and along the smooth unthreaded part at the other end. Use carb/choke cleaner to blast gum and dirt out of those very small fuel orifices. I recommend installing an inline fuel filter also. A shut off valve is recommended too, that way if the needle in the carb sticks open, the crankcase won't be polluted with gas. Usual symptoms on a clogged lawn mower main jet though, are after pushing primer bulb, engine runs about 3 seconds. Try the brass bolt cleaning and post back if needed.

Jun 14, 2011 | Garden

1 Answer

Yard machine 139cc ohv. wont turn over. cleaned carb and bowl. bowl gets gas but gas wont get into carb . think poss vacuum problem

Clean the brass bolt very well that holds the bowl on the carb. Pay very close attention as their are some very small holes in the smooth part of the bolt near the top, as well as the bottom. Use NO metal objects to clean this bolt.It is the main jet of the carburetor also. Once cleaned properly, your fuel flow into carburetor and engine should be restored.

May 24, 2011 | Yard Machines 11A54MC006 21Inch 139cc MTD...

1 Answer

After pushing the red fuel primer butten the engine runs for a minute then shuts off.

This is indicating a fuel flow problem. I would start at the fuel tank and work my way to the main fuel jet on the carburetor. Make sure there is no foreign debris in the tank. Make sure your fuel line is clean and clear of any debris. Small particles can cause huge problems. I recommend installing an inline fuel filter on ALL small equipment. Once the tank and line are clean and clear, remove the float bowl on the carburetor and clean it. The brass bolt that holds the bowl on is also the main jet of the carburetor. I has to be cleaned as well and has very small orifices in the length of it near the top that have to be clear. Use NO metal objects to scrape or clear the main jet. It can be cleaned pretty well with aerosol type carb/choke spray cleaner. Clean the jet till shiny and reinstall. These steps should resolve your fuel flow problem.

May 21, 2011 | Toro Power Lawn Mower

1 Answer

I have a Toro Mower Model 20352 with a model 120000 (126L02 0120F1 0902245944620 Build date: 0209) Briggs engine and it will not run when started. Acts like it is not getting fuel. Even with...

Sometimes, the main jet to these small-engine carburetors gets clogged up. It is easy to get to. It is the brass bolt that holds the float bowl onto the carburetor body. If you remove it, gas will readily flow out, so drain the fuel by removing the fuel line and placing it into a suitable container first. Remove the bolt and exterior washer (don't lose that). Clean the bottom hole in the bolt and pay close attention to the very small holes in the smooth section near the top. Use NO metal objects to clean the orifices as they are a precision size and can't be enlarged or scraped up. Clean the float bowl also while it is off, make sure the bolt is clean and shiny and reinstall. This will assure the carb is getting fuel, providing there is no clog between the fuel tank and the carb body in the fuel line. You should pull it and blow it out, making sure it is clear also. I recommend installing an inline fuel filter on ALL 4 stroke machinery.

May 08, 2011 | Toro Garden

1 Answer

The lawnmower starts for a few seconds, then dies.

Probably a fuel delivery issue. There is a brass bolt that holds the bowl to the carburetor on. It has an exterior washer, so don't lose. This bolt also is the main jet for the carburetor and can become clogged especially if old gas is allowed to evaporate in mower and no in-line fuel filter is used. Drain the fuel tank (or it will drain when you remove the bowl!). The bolt has very small holes on bottom and sides. Make sure they are clean and clear and the bolt is nice and cleaned up. Use no metal, and/or scraping on bolt. Reassemble (don't forget the carb body gasket) and engine should run if no other issues.
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Sep 04, 2010 | Craftsman 675 Torque 190 cc 21" Push Lawn...

1 Answer

Went to reserve fuel - then motor backfiring and loss of power -

Condensation in the gas tank collects at the fuel petcock. Get enough water in there and it gets into the carbs. ALWAYS have a fire extinguisher on hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetors. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb.
Put the carb back together and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Jun 18, 2009 | 2004 Honda Shadow 400

4 Answers

Mower starts up great and then dies

If it's a briggs engine, sounds like you have water / debris in your carb fuel bowl. Using spray carb cleaner will only work if you remove the bowl and clean the carb jets. Also, you could have water in the gas tank as well. First, remove your air filter, then remove the 3 screws that attach your filter bracket to your carburator and mower. Take off your fuel line at the carb and drain all your gas into a clear jar. If it looks very yellow, cloudy, or see water in the bottom of the jug, change your gas. Using a half inch socket wrench, after gas line is disconnected, remove the fuel bowl and clean with carb cleaner. Also, examine the bolt you just removed. There are 2 jets in the side and one at the end. Using the carb cleaner, make sure they are clean as well. Use the carb cleaner extension tube to spray up inside the bottom center of the carb, where the bolt threads, to clean that area as well. After all this make sure ur float assembly is intact and reassemblt the bowl to the carb and reattach the the fuel line. finish bt reattaching the air filter support bracket makinf sure the gasket between the carb and the bracket isn't damaged.

May 21, 2009 | Mtd 22" Yard Machine Push Mower

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