Hi guys. I recently picked up a 1980 R7070 model pre compliant mower with a F 100 series engine. It was hard to start, taking at least 20 pulls to get it going.
So yesterday I took the carb off and cleaned it. I checked the exhaust ports. They were clear. I took the engine off and changed both crank seals. They were the old metal ringed ones. Cleaned off the cooling fins, put in a new plug and put her back together again. After six or seven pulls it started but won't stay running. It runs a few seconds and quits. If I hit the primer bulb it will run till that gas is gone and die down then I hit the primer again and it run a little more.
So it sounds like it isn't getting good fuel flow. Does anyone have any ideas what might cause this or what I might look for when I pull the carb off again?
It is a plastic carb with really no adjustment screws. It did have a jet screw on the side but I'm pretty sure it is supposed to be screwed in snug. Here are two
other things going on with this mower. Sometimes the pull rope will fly back real hard pulling the rope out of my hands, I never really knew why mowers did that and also the crank has probably 40 to 50 thousandths play up and down. I have never had a mower that had that much play. Any help would be appreciated.
Thanks.
Jerry
So yesterday I took the carb off and cleaned it. I checked the exhaust ports. They were clear. I took the engine off and changed both crank seals. They were the old metal ringed ones. Cleaned off the cooling fins, put in a new plug and put her back together again. After six or seven pulls it started but won't stay running. It runs a few seconds and quits. If I hit the primer bulb it will run till that gas is gone and die down then I hit the primer again and it run a little more.
So it sounds like it isn't getting good fuel flow. Does anyone have any ideas what might cause this or what I might look for when I pull the carb off again?
It is a plastic carb with really no adjustment screws. It did have a jet screw on the side but I'm pretty sure it is supposed to be screwed in snug. Here are two
other things going on with this mower. Sometimes the pull rope will fly back real hard pulling the rope out of my hands, I never really knew why mowers did that and also the crank has probably 40 to 50 thousandths play up and down. I have never had a mower that had that much play. Any help would be appreciated.
Thanks.
Jerry