My 743B with the Kubota V1702 has never been a good starting engine. Needs glow plugs to start at 60 Fairenhiet. Was recently trying to get it going on the weekend, -10 F, sitting outdoors. I had the block heaters going, 2 x 400 watt in the block and a 1500 watt external heater. Was showing 160 on the guage, glow plugs on.......it was smoking black out the tail pipe, but, would just not fire. I am considering part of the issue may be the starter is not whipping over the engine quite fast enough due to the temp of the hydralic pump. This unit is equipt with the delco 28MT starter. I do see a nipondenso unit also available for this engine. Does anyone have any knowledge if the Nipondenso starter would crank this over at a faster rpm? Or if there is a better starter option available for this engine? The existing starter sounds OK, the battery is holding a good charge. I generally have it stored in an unheated shed, and usually starts without issue, with the block heaters on.