Can not keep motor running

[firenut8190]

I have a 7.5 Sear Ted Williams. I have rebuilt the carb 2x and the motor will not stay running. I am sure it is a fuel issue. It will run and the all of asudden it will throdle up real high and die. I went out and started it today on the first pull and I had it running for about 1/2. I had it at an idle and throdle it up and shifted it fwd & rev. then after I let set at an idle it staled. I have changed the fuel line and pump thinking it had a samll leak. But I do not know. I am realy Pi**ed of and ready to throw it away. Can anyone help.

[double trouble]

just behind the fuel inlet fitting where the gas line connects to the carb there is a check valve, if you used carb cleaner on it you probably damaged this little rubber valve and need to replace it, how do I know this?? I'm waiting on my check valve to come in from sears now. this thing is pressed into the body so you have to remove it with a puller and have the new one pressed in no fun there, but necessary. Good luck.Ok. I used a piece of tubing like a turky baster and spit gas into the carb (better than starting fluid). It took right off. Did this a few times. But it will not stay running. It dies within a few seconds. I cannot pull start it. I took the carb back off and cleaned it out. Blew wwd40 through all the port holes in it. Put my mouth on the fuel tank and blew air and gas through the lines so they are clear of obstruction. The float bowl was near empty again??
I'm guessing that the fuel is not getting past the inlet needle properly. Bad needle, or the float is not set correctly. You can get a bit more info at http://home.earthlink.net/~brixent

good luck

[firenut8190]

is this check valve the square peice with 3 little holes and 2 arrow shaped slots? can not enlarge pic on that site.