Hello! First time poster here. I’m seeking some help from anyone with knowledge of the predator 670 engines. I repowered my tractor two years ago and it has worked flawlessly, until today. It’s starts and runs perfectly, blowing snow for about 30 minutes and then it acts like it’s starving for fuel. When it does this I have to run it on full choke to limp it home. I let it sit and cool off for a bit and it starts and runs fine for another 30 minutes then same thing. Things I’ve already checked. Fuel tank is venting properly, drained fuel tank and filled with fresh fuel, replaced fuel filter, replaced spark plugs (original ones were VERY black). It’s about 4 degrees here today in iowa, but I have used this machine in -10 weather before without issue. Any help is greatly appreciated!