Lawn mower engine problem

It's worked fine for two years. Then late last summer it quit starting. Last week I tore down the carb to checkit out. Looks like a mini version of the carb on my Ford 801! Only moving parts are the float and valve assembly.

Every thing looked very clean, but I cleaned it up anyway. I was able to spray carb cleaner through all the passages without any apparent obstructions.

There are no adjustments on this carb and it has a bulb primer.

I can get it to run for awhile if I spray starting fluid through the air cleaner. Hard on the engine!

I have a new plug, with a good hot spark. Fresh fuel. The bowl on the carb is filling up ok.

I'm out of ideas. Can anyone give me some advice?

TIA, John

Thanks to all.

John

They offered to take a look at the mower for $60 and might take a couple of weeks to get to it, parts extra of course!

One question about the bulb that the dealer could not answer. The original bulb had a small hole on the very end, looked factory made. Also has a screen inside where the bulb seats. So I think the hole should be there, some kind of air bleed maybe? The bulb that the dealer put on has no hole at all. Are these for a different type of carb?

So I guess I'll take it all apart and soak everything that looks like it can hanle it in the Berryman carb cleaner. Then make a small hole in the new bulb (like the original) and try again.

Any more suggestions for me (mama vetoed the cement truck)?

Thanks, John

If you don't like the idea Tom gave, maybe asphalt or concrete is an option. :^)