Hi, my self propelled toro wont stay on, when i hold the lever that opens up the carb. flap it works fine.

Carburetor Cleaning TUNE UP of Toro 6 5HP Lawnmower with Tecumseh Engine

The above link will provide a video on how to clean the carb on the 6.5 hp mower. Before you go to that length, try putting some carb cleaner in the fuel tank and see if that corrects the problem. Also, as the video shows, make sure the spark plug is getting a good spark. If the spark is weak , the fly wheel may be rusted, ot the magneto is bad.

It seems to be an obstruction in your fuel delivery system. Get a can of ether and a spray a short burst of it into the breather area near the carburetor, if the mower starts up and then stalls out, then you may need to get your carburetor serviced.

maybe u have to much oil in it or there mite be a stone in the carberator or petrol tank thats blocking the petrol ?

Is it a two stroke model or four stroke?

5 Rules for troubleshooting engine problems:
1. Spark
2. Compression
3. Accessories
4. Carbonation
5. Timing


Those are listed in order of how hard they are to do.First check the plug and wire.Now is a good time to change the air filter also.

Step two will require a compression gauge,if you do not have one before you go buy one.Try to start the mower.If when you pull the rope goes back in and pulls tight your compression is ok,if not buy a gauge.

Step three.Check that the cable(kill switch) attached to the handle is in good repair.

Next is the carb.You may need to clean it.Carb cleaner would be my first choice,the spray can type. Now if that still wont fix it.You need to tear down the carb and clean a small screen on the inside.That step is far from fun,but is not very hard to do.

Lastly is to check the timing.This can be done by dissembling the crank case and realigning the gears. The gears are marked so it is not as hard s it sounds.


Should none of that work,look at the belt make sure it is not broken and jammed up in the pulleys.

IF THERE IS A PRIMER BULB ON THE CARB CHECK AND SEE IF IT IS HOLDING GAS IF NOT THE CHECK VALVE UNDER THE PRIMER IS BAD AND SUCKING AIR

Have you tried replacing the gas cap? I had the same problem with my mower and did everything you have done, changed gas cap no problem since

pipe from carb to engine broken. couldn't tell until covers & fuel tank removed. also part of deck holding engine came apart on mine. due to excessive vibration???