- Joined
- Oct 25, 2004
- Messages
- 47
- First name
- darylat8750
Hi guys, I havn't been on for a while as my 4341 has been trouble free 
.
My neibor bought a nearly new 6441. It is very nice. One issue: it smokes on start up untill it is warmed up. Even warm it smells more of unburned fuel than mine or another neibors older turbo zetor (i think it is a 7341). In reading the forum I got the idea that it is possible that the fuel injector timing may be retarded. If this is so, is this something that "shade tree mechanics" can fix, or is special equipment needed? This new tractor does start very well, even without preheating at -25C and 8700ft elevation. (It had been sitting outside beyound reach of electricty and I was amazed at how quickly it fired right up. My 4341 may have started under those conditions but I wouldn't have bet on it). We wouldn't want to make it harder to start.
Question 2: these tractors are used primarally for snow removal and sometimes need to be left by the highway so we can dig our way back to our houses on return from town. At 8700Ft elevation the pressure in the cylinders is about 30% less than at sea level. Would increasing the compression ratio on my 4341 by thinner head gaskets or shaving the heads improve starting and increase power enough to be worth the bother? If I did shave the heads, how much material should i take off? I understand that the older tractors had higher compression ratios than mine.
Any thoughts would be appreciated
Daryl Wy, USA
.My neibor bought a nearly new 6441. It is very nice. One issue: it smokes on start up untill it is warmed up. Even warm it smells more of unburned fuel than mine or another neibors older turbo zetor (i think it is a 7341). In reading the forum I got the idea that it is possible that the fuel injector timing may be retarded. If this is so, is this something that "shade tree mechanics" can fix, or is special equipment needed? This new tractor does start very well, even without preheating at -25C and 8700ft elevation. (It had been sitting outside beyound reach of electricty and I was amazed at how quickly it fired right up. My 4341 may have started under those conditions but I wouldn't have bet on it). We wouldn't want to make it harder to start.
Question 2: these tractors are used primarally for snow removal and sometimes need to be left by the highway so we can dig our way back to our houses on return from town. At 8700Ft elevation the pressure in the cylinders is about 30% less than at sea level. Would increasing the compression ratio on my 4341 by thinner head gaskets or shaving the heads improve starting and increase power enough to be worth the bother? If I did shave the heads, how much material should i take off? I understand that the older tractors had higher compression ratios than mine.
Any thoughts would be appreciated
Daryl Wy, USA
