1992 25hp johnson doesn't stay running

[mcanswer]

I have changed the gaskets on the fuel pump. checked for spark ok<br /><br />engine starts up and then slowly dies out. doesn't seem to stay running. I have the idle screw 3 turns from all the way in./ I try to adjust it but nothing happens. <br />could it be I have to do the carb?<br /><br />or any suggestions. and does any one have the diagram for the carb so that I can use it to put it back together

 

[OBJ]

Re: 1992 25hp johnson doesn't stay running

Welcome mcanswer!<br /><br />The idle screw is a tad out far. Screw it in till it's GENTLY seated and then back out 1 1/4 to 1 1/2 turns out and start there.<br /><br />If you still have problems keeping it running, take some premix fuel in a spray bottle and when the engine starts to die out, shoot some premix into the carb throat. If it picks back up, you have a fuel supply problem. <br /><br />Have you tried squeezing the primer bulb when it starts to die? Fuel tank vented?<br /><br />Just a couple questions for you...is the engine new to you and if so, how long has it set before you got it?