Hi,

Im having a problem with my suffolk punch lawnmower. Initially it wouldn't start but now after a little fiddling I have managed to do this. However, now when it is running and I put it to full throttle its doesn't really make a blind bit of difference. Also I have to leave the choke completely off to allow it to run. I let it sit and idle for a while and I cut off the fuel supply from the tank and hey presto! It started to run really fast and I could cut the grass, but obviously it was going to run out of fuel sharpish so I re-opened the fuel line to the Carb and the engine died down again to idle.

Does anyone have any ideas? I really dont want to go ripping it apart and later finding it was something really simple.

Many thanks

Andy

sounds like the needle valve in the carburettor is sticking open letting too much fuel into the engine.
You can remove the float bowl without taking the carb off fully and try to remove the float and needle. It will be tricky unless you tip the whole thing upside down.
I used to have one of these machines. I ended up going through two carbs and then decided to scrap it because it cost too much to repair.

matt.

Yeah that's definitely a flooding carburetor , im not familiar with the carb used on the Suffolk punch but its likely that you can get carb overhaul kits. failing that if its a troublesome carb setup kits are usually available or you could modify the mower yourself to use a different , more reliable carb.

As mentioned above... your carb is flooding! The trouble with this problem on a Suffolk Punch is finding out which engine / carburettor it is fitted with. Zenith, Dellorto, Tillotson, Techumseh were just some of the carbs they have been fitted with over the years. Nearly all of them are VERY obsolete and near impossible to find spare parts for!!! Once you know which carburettor you are looking for try searching the following link for all of your Atco / Qualcast Webb Spare Parts - Atco - Qualcast - Webb Spares - Lawnmower World

Regards
L-M-L