On Thursday, December 1, 2016 at 12:20:08 PM UTC-5, Uncle Monster wrote:
On Thursday, December 1, 2016 at 10:25:47 AM UTC-6, Uday Vallamsetty wrote:
I have a craftsmen 5.5 horse power lawnmower.

It starts up only when I spray starter fluid into the carb from the air filter side and then dies in a few seconds.

I removed the carburetor and cleaned the bottom portion which had a lot of yellow gunk build up. I cleaned the little holes in the bottom screw and removed the gunk. I am not sure how to break apart the carburetor so I just put it back after rinsing it in fuel.

I also replaced the air filter.

it starts when I spray starter fluid and then dies.

I thought it was a fuel delivery problem, but when I removed the carburetor I noticed fuel coming out from the carb as I had not disconnected the fuel line, so I am not sure if that is the cause.

Any ideas ?

You can often purchase a new carb for a mower cheaper and for less hassle than rebuilding one. It depends how much you believe your time is worth. I obtained a new carb for my housemates Sears mower several years ago for less than $25 which I considered less expensive than my time to frak with the carb on the mower. Make sure you cross reference the correct carb for your mower but here is one example in the link below.

https://www.amazon.com/Carburetor-Re.../dp/B009GSLERK

[8~{} Uncle Carb Monster

I bought a new carb for my Honda mower about 4 years back. I felt the same way
as you. $25 for a plug-and-play carb vs. $10 for rebuilding the existing one.
Turns out the problem was just bad gas so I tossed the carb on the shelf.

When the mower started to run really bad earlier this year even with brand
new gas and spray-cleaned carb, I decided to throw the new carb on. 30
minutes later and she was running like new.

Some things are cheap enough that it's not worth spending a little less but
having to waste time doing more work.

Cousin Plug-And-Play Monster