i have a 2144 combine. It is a very nice machine and gives very little trouble. the only problem is the 5.9 engine is very weak. I have owned 1660, 2366, and 2388. the 2144 is so weak it will lose speed on the highway back to 11mph on hills and if you speed up slightly it will pull the engine down enough the buzzer comes on. you can combine 5 mph downhill sometimes but only 2 uphill and riding the buzzer. I don't think there is a problem with the engine I think its just that weak. has anybody else noticed this with 2144?