Im having problems with he starter on Mitsubishi Bus , after traveling a distance it won't start , then after leaving it a bit its starts . Other times it won't start and then bang it goes again. Just wondered were in Tauranga was best to take it to have it tested at a reasonable price. I spoke to my local mechanic at Whakamarama but he said he would take starter motor off and take it in for testing but the motor home would have to be left outside for days. I don't want it left out in public for days with no fencing.
When you say "it won't start": what do you mean, exactly?
Does the starter motor operate, but the pinion doesn't engage with the crown wheel to turn the diesel motor (it just whines) - or what?
If this is the situation, then some on here have said, in the past, that there may be insufficient voltage getting to the starter.
I had this problem on a Rosa. Paid to have the starter "rebuilt" (whatever that means) but that lasted only a few months (when the bus wasn't really used!) and I ended up getting a Chinese starter motor installed.
Any competent diesel mechanic could do the job.