Wont start when engine is hot - 1992 Daihatsu Rocky

its possible that you froze the engine replace it

C190 is a 2.0 L OHV 8V engine same as marine 4AA1.
when warm did you try diesel test fuel?
runs now , right, or runs and stalls. right?
that be the biggest clue there.
besides black smoke.
lost compression hot.
or lost fueling hot.
simple test for compression and test fuel....... leaving what?

run fault codes and look for faulty sensors

crankshaft sending unit creates these issues. if check engine light
is activated during these issues

hard starting problems when engine hot could be restricted air filter.restricted clogged fuel injectors.engine could either be diesel or gasoline.if engine dont start and starter wont turn over engine. could have bad battery ground cable or battery positive cable could have broken place when cable get hot crack increases cause less current engine wont have enough power to turn over.

once had the same problem the armature in the starter expands when hot and wont crank cools down and starter works

It is likely a fuel pump problem, confirm this by spraying starting fluid into the engine when the no start occurs, if it fires up then you have a poss fuel pump sticking problem.. This assumes you mean the engine is being cranked over with the starter but does not fire up.

it wont start because the engine timing usually be off when the engine is hott

I would check the pick up coil in the distributor.

What is the condition of the starter ? Is this an engine hard to turn over problem when hot ? If so, the starter might be grounding out, this happens only when the casing is hot.