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I even used the starter fluid with the carb off and shot it directly into the input port. But it's running - that's the important thing!

I'm back - as promised! I hate throwing parts at things but many people encouraged me to buy a new carburetor. I was reluctant as starter fluid wouldn't get it to run. But I sent Jeff Bezos $14 and he delivered a new carb to my door. (Rakiyada 799584). I had to clean up one of the throttle...

I am going to be out of town for several days but I will get back on this upon my return. I will certainly post what happens going forward. One more thought ... since the intake valve is only open about 25% of the time, I wonder if my ether spray was not making it to the combustion chamber? I...

Great idea - will do ! Thanks!

Sorry - I somehow missed your earlier reply - just went back & found it. I removed the flywheel nut so I could see the key but I have not removed the flywheel. I have good compression. I've tried a couple of coils. I have not hit anything to knock timing off. When it died initially, I was able...

Thanks! Sounds like ethanol is getting a bad rap! I will read all this later today as I have yard work to do after wind storm last night.

can you elaborate?

Thanks - my thoughts as well. Berryman B-12 Carb Cleaner spray has been suggested.

I will certainly drain and clean the tank befoe refilling with fresh gas . Thanks!

I have removed the big nut that fastens the flywheel and the flywheel key looks good. But I have not removed the flywheel. I am planning to drain gas tank and float bowl and put in fresh gas and see what happens. The gas I used was very new but I suppose it could have been bad. I did take the...

I don't want the mower to beat me - I need to know what the problem is or I will forever feel bad that I have failed! At least I was able to return one of the coils. But I do appreciate your suggestion.

Yup, have been using business card and then verifying with feeler gauge.

I bought the new B&S plug from local True Value. The new coil came from B&S. The specs for this engine say armature gap should be 0.006 - 0.014

@Auto Doc's | The borrowed mower has a B&S 158cc flathead from year 2000 with a Pulsa-Prime carb with priming bulb. I will start over with new fuel and empty the float again. This may take me a day or two but I will keep everyone posted. If it won't fire on Berryman's B-12 Carb Cleaner (I...

@Auto Doc's | Interesting about the Chemtool B-12 Carb spray. You've got me thinking about my fuel as I believe I just got new gas prior to the problem onset. But that same fuel is running my borrowed mower just fine. But maybe water (heavier than gas) got to bottom of my tank.

Thanks for the response. But shouldn't starter fluid have made it run consistently for a few seconds?

My 2013 Troy Bilt 21" push mower has been running well. But recently after running for about 2 minutes it stalled. It restarted twice but ran for only about 20 seconds - did this twice. I assumed carburetor problem even though I run ethanol-free gas. I took carb off, did normal cleaning...

I've got same problem with my 550EX. Did you ever find the solution? Thanks!

My well maintained 8 year old 550EX just started expelling oil from the breather tube into the air filter box. My oil level is perfect and the machine has not been tilted or inverted. It seems that this is due either to either excessive crankcase pressure (from bad rings or head gasket) or the...

moved to B&S Forum - moderator, please delete - I was not able to. Thanks.