We noticed a nice increase in productivity when going from the 66 to 88 sized machine. I think a lot of that had to do with the larger rotor/sieves. We made the jump back in the 1666/1688 era.
The 77s are the same core machine as the 88s, but with less HP. You probably won't notice the HP in corn, so you would be able to push the machine to its limit of clean grain elevator or sieves. You'll be driving pretty fast with a 6 row corn head on a 77, but people do that. A 25 or 30' platform would be about right. You can also add the hopper extension so it holds as much as a 88 does.
The electronic engines do burn more fuel than the mechanical pump engines. I think the 2005s were the last model year for mechanical pumps.
-Lance
The 77s are the same core machine as the 88s, but with less HP. You probably won't notice the HP in corn, so you would be able to push the machine to its limit of clean grain elevator or sieves. You'll be driving pretty fast with a 6 row corn head on a 77, but people do that. A 25 or 30' platform would be about right. You can also add the hopper extension so it holds as much as a 88 does.
The electronic engines do burn more fuel than the mechanical pump engines. I think the 2005s were the last model year for mechanical pumps.
-Lance