Craftsman LT1000 running slow
I have a Craftsman LT1000
Ok here is the problem... the motor will run but not at full throttle. The motor will not run at full speed.
Ok here is what I have done to correct the problem:
Rebuilt Card and I soaked card in Seafoam to remove any varnish.
Checked fuel lines. Good
Checked gas cap. Good
Replaced fuel filter. New
Adjusted valves: .004 of an inch.
Checked fuel pump: Good. When I connect to 12v the plunger comes down till I disconnect from 12v.
Here is what is happening:
The motor will start fine but will not run at full speed.
When I was adjusting the valves I noticed the exhaust value was not moving/opening as much as the intake valve. I am not sure if this is normal, I am thinking not. Both rods are in great shape along with springs.
The motor acts as if there is a restriction; Maybe fuel or exhaust but I am not sure. If I had to guess at this point I am thinking it is the exhaust valve but I am not 100% positive this is the problem. I believe the muffler is in good shape and has no restrictions. I do get a backfire every now and then and am not sure if this is a problem. The motor may backfire once every 50 starts.
When I disconnect the fuel pump the motor will run at full speed for about five seconds and then shut down unless I reconnect the fuel pump. Maybe the pump is bad but I do not think so.
I have done a lot of research on this problem including this forum and it seems this is a common problem with this motor. I am hoping someone can lead me to the correct solution.