In the Arctic we started in fine pitch on all models 100, 200 & 300. It started oil flowing to the prop and thus lubricating the shaft. We had some initial problems with shaft bearings due to the different coefficients of expansion at those temps. At those temps we would feather at least 4 or 5 times after the start to keep the oil flowing. And this was after about 30 minutes with Herman in each intake (engine covers on).