Hoping to find some help or guidance. I have this 6000# daewoo forklift for my business. bought it a year ago and i've never been satisfied with it. hr meter is over 12k. The engine starts and runs fine, but is super slugish. It works on level surfaces but on any sort of incline it can't hardly pull its own weight.

The ignition system has had a tune up with a new cap/rotor/coil/wires/plugs and has good spark. The PVC was leaking and has been fixed. I had a specialist come by and he said our propane system was all functioning properly.

I checked Compression on all cylinders and is was roughly 106-110.

Im moving to a large warehouse here soon, and we are installing a dock ramp to go between the inside/outside, and I'm pretty sure this will never make it up the ramp, especially with a few thousand pounds on it.

Looking for any guidance as to what to look for, or where to go next. I like this forklift but the lack of power has really been a big disappointment since day 1