I have a 1989 743 with the kobota diesel in it.ive owned for many years so I know its quirks.it sat untouched for a full year.it allways started with around 60 seconds of glow.never needed quick start.i now have to use quick start.the glow plugs are getting power and if I don't glow it and just try quick start it wont fire which would seem to say they are working.i had them out 2 years ago and they were in perfect working order.ive put fuel additives in the fuel,used at least 3 tanks of fuel since it sat,it runs perfect and starts perfect when hot.im told my injectors need to be replaced,but I thought I will ask the real experts