Hello, I am at a loss so I thought I would ask here. I have a Poulan mower with a B&S 450, a couple of weeks ago it started sputtering like it was running out of gas. I pulled the carb did the usual gas through a straw, all with the same effect. after receiving fuel from the prime, or via straw it would run till it would burn it off then stop. Took off the air cleaner to watch and it does not appear as fuel is coming into the carb through the jet. Decided to heck with it and replaced the carb completely. So primed it, started it, it died... thought new carb do it a couple of times to get fuel flow. Ran for 5 seconds and quit. If I take and slowly push the primer on it it will stay running like a champ but for some reason the mower is not drawing fuel into the chamber on its own accord. I am lost what else can I do other than shell out money for a new mower???
Did you replace the intake gasket when you replaced the carb? Sounds like you have an air leak somewhere, if a new carb didn't do the trick. Post the engine numbers please.
Rivets, thank you for responding. When I replaced the carb it came with brand new tank to carb, carb to air cleaner, and the o-rings going to the cylinder. The Poulan data plate has 2 model numbers 961120070 04, and PO450N20S. The B&S has the numbers 09T5023852B1. The only rubber/seal that didnt get replaced was the rubber elbow coming off of it for the (I believe) air-fuel mixture.
I've put two websites below which may help you. After looking up the engine, my best guess is that it is not assembled correctly. You must make sure that the gasket is next to the carb and the diapraghm is next to the tank. Also did you install the choke spring correctly. One website is a parts breakdown and the other is a service manual. Hope this will help you.
