Well here we go. I am working on a 345 for a guy and it hardly runs. There is a little history here that should be noted. Last year he got it REAL hot. To the point that it melted the plastic valve covers. The small hose on the water pump leaked all the coolant out. Amazingly it ran a whole year with no problems afterward.
This year is a different story, it will not run with the choke off. And if it does run, it misses until the choke is half way engaged. Now this is where it get interesting. I have pulled the fender deck and checked the plastic tube into the tank. I have cleaned the carburetor 2 times. I have replaced the fuel pump, fuel shutoff solenoid, carburetor, and the time delay module. I don't know what else could be replaced fuel related. I also threw a couple of new plugs at it. So I thought I would take a shot in the dark and do a compression test. JD tech manual says a minimum of 170 psi. I got a reading of 100 in both cylinders. I did a test on another 345 next to it and got 150 psi on a 1300 hour machine.
Once I got this reading, I tried the oil in the cylinder deal and got it to seal up to 180. I did a leakdown and I am getting air coming up through the pushrod area.
He wants to rebuild it, I haven't checked with the dealers yet for parts but, are the readily available? They have got to be expensive I would guess. What has everyone ran into?
This year is a different story, it will not run with the choke off. And if it does run, it misses until the choke is half way engaged. Now this is where it get interesting. I have pulled the fender deck and checked the plastic tube into the tank. I have cleaned the carburetor 2 times. I have replaced the fuel pump, fuel shutoff solenoid, carburetor, and the time delay module. I don't know what else could be replaced fuel related. I also threw a couple of new plugs at it. So I thought I would take a shot in the dark and do a compression test. JD tech manual says a minimum of 170 psi. I got a reading of 100 in both cylinders. I did a test on another 345 next to it and got 150 psi on a 1300 hour machine.
Once I got this reading, I tried the oil in the cylinder deal and got it to seal up to 180. I did a leakdown and I am getting air coming up through the pushrod area.
He wants to rebuild it, I haven't checked with the dealers yet for parts but, are the readily available? They have got to be expensive I would guess. What has everyone ran into?
