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Toro Lawn Mower won't start, doesn't prime using the priming push

Hello, I have an older Toro Lawn Mower that I got from a friend, the model number tag is missing. It looks similar to the one in the picture, but it is red. I went to use it the other day and it wouldn't start. I saw the fuel line was really bad, one thing led to another and I ended up removing the carb and manifold assembly. I replaced the fuel line, put new gaskets, cleaned out the carb and reinstalled everything. It seems like it is not getting fuel. When I prime it the rubber primer button seems really week, I keep pumping it and it never feels like it pressurizes. If I spray starter fluid down the intake it starts then immediately dies. Any suggestions? Thanks, Rob

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  • sunneyskies May 29, 2010

    what make of engine is on the unit?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 211 Answers

SOURCE: engine will not stay running

Hi

When the engine stops check the spark at the spark plug.Check compression(remove the spark plug and ground the plug wire on the engine,seal the plug hole with your thumb.Operate the starter.If the compression preasure blows your thumb off the hole,the compression is adequate for the engine to run.Now priming the engine(put some gas into the spark plug hole,back the spark plug and try to start the engine.Let me know. savumihai71 regards

Posted on Dec 10, 2008

  • 2926 Answers

SOURCE: My lawn mower starts, runs for about 5 seconds and

The engine is starving for fuel, that is why it will keep running while you force the fuel to the engine with the primer button. At this point, the carb will have to be removed,disassembled and cleaned. I'm sure you will find blockage and dirt in the carb and also in the small orifices for air and fuel flow.

Posted on May 31, 2010

  • 111 Answers

SOURCE: toro recycler 20017 is very

The carburetor may need to be serviced. You need to find a parts shop that handles Tecumseh parts. You will most likely need a rebuild kit for the carburetor. The carburetor part number is 640303. The rebuild kit is 632809. The Tecumseh engine company shut its' doors 3 years ago. Finding parts is becoming harder and harder. I've heard that someone has bought Tecumseh over the winter but it is unknown when the new parts will hit the market. Best of luck to you.

Posted on Apr 05, 2011

hunter19_46m
  • 7482 Answers

SOURCE: I have a Toro GTS5 Super Recycler mower model

Hi ricks7...
I also believe that it is a problem with the jets.
Try some of these solutions
-----------------------------------------------------------------------------------------------------------------------------------------------

Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of weedeaters.
Also make sure you are using fresh fuel...and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the mower/weedeater is over a year old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.
I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.
Once you have your carburetor rebuilt that should solve your problem.
This is a FREE answer,Please take time to rate me

Posted on May 28, 2011

hunter19_46m
  • 7482 Answers

SOURCE: Lawn mower starts after priming, runs for 10 to 20

Hi ibwinn379...

Sounds like you have dirt/debris in your carburetor jets or fuel passages.
Check/Clean/Replace your fuel filter if you have one.
Also make sure you are using fresh fuel...and oil mix if your using a two cycle mower or weedeater with the oil to the right mixture and not too much oil as it can cause hard starting.
If the mower/weedeater is over a year old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.
I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.
Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.
Once you have your carburetor rebuilt that should solve your problem.
This is a FREE answer,Please take time to rate me

Posted on Jun 01, 2011

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1 Answer

My lawn mower starts fine after i prime it but then shuts off aer 10 seconds


Sounds like it's starved for fuel. Usually this can be fixed by cleaning the carburetor and/or installing a carb kit. What are the model and type numbers stamped on the engine?

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Mower won't start. Toro mower..engine won't turn over. Cleaned sparkplug...checked air filter..weather cool. Followed instructions for cold engine...prime witrh three pushes of the bulb..wnon't even hint...


Something everyone over looks is oil. Did you check the oil? You seemed to mention everything else but. If you have a low oil switch with low oil it will not start

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Totr model #20479 GTS 5 motor, when you push prime


Fuel Starvation - Float Bowl Carburetor
1) remove air filter assembly
*be cautious of tearing the mounting gasket. If it does tear, you HAVE to replace it. It is part of the priming system
2) remove the float bowl fastener. This is the main jet
3) carefully remove the float bowl, the rubber o-ring/gasket will not be able to be used if it is removed, you WILL have to replace it
4) using a spray 'carb cleaner'
spray up thru the center of the carburetor
spray and clean the main jet with cleaner and 'tag' wire
(tag wire is very thin, and can be used to clean the hole in the center of the main jet)
5) clean any debris from inside the bowl or carb body
6) re-install bowl and center bolt, air filter assembly

*if you need gaskets, your Briggs dealer can supply. The kit is cheaper than individual gaskets, and all the parts needed to finish the above repair are in the kit.

Nov 16, 2009 | Toro Lawn Mower With Toro Power Tools

1 Answer

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after attempting to start a few times;remove the spark plug and, check it if it is wet the engine is flooding dry the plug and, reinsert prime once and, attempt to start
if the plug is dry check the fuel filter
ground the plug while starting to check for spark

Sep 14, 2009 | Toro Lawn Mower With Toro Power Tools

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Mower will not stay running


cleaning the carb might work soak it in gas foe a lil wile and it may fix the problem

May 31, 2009 | Toro Lawn Mower With Toro Power Tools

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The problem is that the gas that sat in the carb all winter glazed it over and gummed it up. Begin by going to any auto parts store, like an aiutozone, and getting a bottle of carb. cleaner. Seafoam is one I use. Add it to your gas, one ounce per gallon of gas. Also, pick up a can of engine starting spray.

Remove the air filter and spray the engine starting spray into the air intake. Pull start the engine and give it additional squirts of engine starting spray until it runs smoothly.

May 30, 2009 | Toro Lawn Mower With Toro Power Tools

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