Hi all, Nice forum. Forrestry is not my trade but I just wondered if somebody might be able to help me. I have a maccat which is running rough. I have cleaned the air filter and changed the plug. I think it needs a bit of a tune up but I wondered if there was a service manual available for this model. I bought the saw secondhand and it had no manuals with it. On top of the carb are 3 screws, hi, low, and idle. If a muanual is not available I wonder if maybe someone could help me with some advise on how to tune it. I am a car mechanic by trade so I understand engines, carbs etc. I have tried to tune this saw by twidling the screws until it sounds right. This is great until i try to start it! I then have to retune it until it starts and gets up to temperature then tune it until it runs right!! This is getting annoying - I just want to be able to get the saw out and use it not spend 2 hours getting it to run right then use it for 10 minutes to cut some logs!! The ammount I use the saw it would take less time to use a bow saw!! Thanks in advance.

I have a Husqvarna 55 rancher that I melted the ring on. I replaced the ring, piston and jug but it still wouldn't run right. (I never changed anything in the bottom end.) It seemed to start and idle fine but not accelerate. I've since replaced the fuel line, fuel filter, air filter, spark plug and rebuilt the carb. Now it seems to start, idle, and even wants to accelerate, but only with the choke on. Which I know isn't right. I'm going to check the fuel line again, but is there any chance this could be seals in the lower end?