Here is where you come to fine help with your Lincoln Classic 300HE Code # 11902 / 12684
The Lincoln classic 300 HE was the first in a long line of Lincoln diesel-drive machines with DC welding power, auxiliary AC. If the truth be known, it is a 250-amp machine at 100% duty cycle at 250 amps and 60% duty cycle at 300 amps. Unless you're running large wire on long welds, it doesn't mean squat! In my humble opinion, this appears to be an excellent machine. You can run about any size rod; it has enough output power to run most wires, not enough to arc gouge with 1/4" (you need a steady 400 amps CC).
​
Lincoln's most significant challenge (besides cost) is the EPA. At 1800 RPMs, it just barely makes the cut, with the Feds. The Kubota D1503M is an electronically controlled engine. If you have one of these jewels, you need a spare module (non-repairable).
For all intents and purposes, this unit is basically the same welder as the SA 250 and Classics 2 & 3. This is a good and proven design. The sheet metal is new; they use non-repairable PC boards, and the second-generation (cheap) black plastic range switch (M13335).
​
