By mistake, mixed 2-cycle oil with the gasoline for my lawn mower.Ran fine.Next time would not run?What do?

Question

I dumped the 2-cycle oil gas mix from the gas tank of the push mower. Changed spark plug. Cleaned air filter. Still will not run. What now? For some reason, if pump the safety release handle, it will run for about 3 minutes, if I keep pumping the handle. Then it dies. Did the 2-cycle oil gas mix clog up the carburator? Or is pumping the safety release handle indicating some other problem?

Answer 1

The carb jet is probably plugged. If there is a float bowl on the carb remove it by taking the bolt out of the bottom. That bolt is usually the jet orifice. Look at the end and you should find a.006 to .010 hole in the end. Blow it out or stick a fine wire in it.

Answer 2

depends on how old the mower, for one thing. good chance that the entire head and piston are carboned up, take it to a shop, it takes all of ten minutes to pull the head on a Briggs motor. A cleanup of the head will allow it to run properly. Ought to be done about every 3-4 years anyway. If you work on it yourself you know the first thing to be done is take out the spark plug. A few wrenches, carb cleaner, and a wire brush that fits in your power drill (brass, NOT steel...) will do the job nicely. wipe out everything with paper towel when done, stray bits of brass wire will kill the engine. Turn the valves in the seats, use a piece of 400 grit sandpaper to clean up the contact area with the block. Easy, satisfying repair. One caution - don't stretch the springs on the carb/throttle mechanism. Don't bend any tangs or stops. B&S engines get a bit flakey if you mess with the carb or governor linkages. As for the safety release - any shift in cable attached? might just be a matter of taking a screwdriver to it and realigning the cable, move it 1/2", retighten, see if it helps...

Answer 3

if you get it fixed and it runs chjoppy chances are you have developed pinholes in the top of the piston. replsce the piston and reset the timing. drain all gas and oil from your mower. and clean out the gas tank and replace with fresh oil and some new gas and make sure the gas does not have any water in it.and probably replace the plug and check for correct plug gap. and tru it again. / now if it still runs choppy then a complete overhaul is really possible.

Answer 4

just doing this one time really wont cause all that much damage,it will kill the spark plug though,and when it does it wont start at all,as for actually clogging up the carb,,it wont ,,at least not that fast,however the 2-cycle gas burns much hotter,so it probably got the plug for sure,change your plug,and make sure your safety handle is working right ,,if it does not pull back all the way,,you wont get any fire to the motor,,really it,s a simple fix,,just take your time,,you,ll get it going in no time.

Answer 5

is there an inline fuel filter between the tank and carb???? chances are the oil clogged it up. go to western-auto or your local small engine shop and purchase another, dont cost much.

drain tank replace filter, if this doesnt work take the bowl off the bottom of carb and clean it out, the oil might have gummed up your needle valve or the float.

Answer 6

The oil/gas mix most likely fouled spark plug,Take out and clean.

Answer 7

hey, you got a bad plug amigo, remove old plug and replace it with a new one,. drain old fuel and put some fresh fuel on it.prime carb and give it a good pull. should start right up

Answer 8

clean garburator it has cloged it up big times with gum from the 2 -cycle oil

Answer 9

change spark plug or clean

Answer 10

clean carb, change plug