It stalls out going uphill and when I disconnect the gas line and blow in to it it runs fine! I have a feeling it is not getting enough gas flow? I have drained the gas tank and put fresh gas in it, I have replaced the fuel filter too. What else could it be? Should I replace the gas line? Maybe the carburator? Please help!

It wants gas and carb on grade isn't happening here. Check for pinched fuel line and gas cap venting
Here's are the choices. You need to look at the carbs float and needle and set valve and fuel pump. Check float and needle and seat valve first Clean it out and try that and check the float to make sure it doesn't hang up and works the needle and set valve easily.

I don't see a make and model No# here ,so haven't the foggiest what you are using.

It is a 14hp Briggs and Stratton, model #287707. Unfortunately, I am new to the "world" of small engine repair so I'm not sure how to do what you're suggesting. I looked at the gas cap and the small hole in the top does not look clogged. I took the bowl off the carb and checked the float and it looks to me like it moves OK. I'm sure it may be hard to explain how to seat valve, but maybe you could try! Thanks for your help!

I need all of the numbers for

Make
Model
Type
video_player

I added this guessing on the "type" of engine you have. Carb adjustments are in this manual and a parts manual. Repost the numbers so I can verify I have the correct manual for you.

http://www.briggsandstratton.com/mai...=MS2719_LO.pdf

http://www.briggsandstratton.com/mai...75038_-_LO.pdf

Of you look at the parts manual , #106 is the valve seat and #105 ( Is the valve float needle) That operates off the gas bowl "Float" This regulates the amount pg gas flow into the carb. If seat or needle is bad then its either too much fuel or to little fuel in the fuel bowl. Your bowl may be to low and the Hill tilts the bowl and carb starves for fuel to get up the hill. Or carb adjustments are off or bowl or a combined thing.

This is a Briggs and Stratton, 14hp OHV I/C Quiet, model#287707, type 022501, code 9403284A... hope all that helps. I bought this mower "used" a few months ago. One time when I was mowing with it I turned it off facing on a slight downhill to do something else and when I returned it would not turn over and I noticed gas "gushing" from the bowl on the carb... I called the guy who sold it to me and he came over and took the bowl off and said the float must have gotten stuck. He made sure there was no gas in the oil. He said sometimes you have to lightly tap on the bowl to unstick the float. He blew in to the gas line and it ran fine until the next time. It only seemed to stall out on the hill, but now is doing it on the level part of our yard. I checked the gas line and I do not see any "pinches" in it. I also put fresh gas in it because I didn't know how long he had the mower sitting at his house before I bought it... and it still stalls out. Is there a chance that something is obstructing the gas flow in the gas line or maybe there is sedament or something else in the tank? Is there a product you can buy to clean out any "gunk" buildup in you tank by adding it to the gas or should I replace the gas line? Or do you think it is a problem with the carb like you said? I sure do appreciate your help so far!

Thanks for all the numbers. I have your parts manual below along with the repair manual.

At this point its time for you to rebuild the carb and stop playing with it. Its not ahrd to do.

Use carb cleaner to clean the parts and do it over a gas friendly pan.

Since the carbs off use the new fuel pump. I

http://www.briggsandstratton.com/mai...75038_-_LO.pdf

http://www.briggsandstratton.com/mai...=MS2719_LO.pdf

What do you mean when you say "since the carbs off use the new fuel pump"? Do I need to take everything apart... YIKES! I'm an amateur so will the manual show me in detail how to go about doing it? Thanks again!

Actually the carb kit has complete directions on how to rebuild it. There's not a lot to it.

I didn't look at the kit yet By I do know the fuel pump it part No# 387.. Its really not that hard. Its fairly low tech. If you run into a problem Post back. Between the exploded parts view and the kit directions and the Carb adjustments of your manual I posted you can cross reference it all and no guessing in part terminology etc.

I'm postings some carb video for you to get a feel for what needs to be done on the rebuild.

YouTube - How a carburetor works

YouTube - Lawnmower Man Carburetor Video

YouTube - how to clean a carburator