Hello, new to the site and have some questions about a 1750 diesel.It has to be started with starting fluid regardless if the engine is cold or warm. The tractor has around 7000 hrs, but we have only owned the tractor a few years. It runs good when you do get it started and does not use any oil so I don't think it needs a major overhaul. If you don't use ether while starting, it will crank continuously and smoke small tuffets, but not run. So I'm wondering about intake/exhaust valve leakage, from what I've read elsewhere on the internet, maybe these 1750s have problems with valves? Is there a good way to check for cylinder leakage with air/bringing cylinders to tdc? Thanks!