Advice welcome please.
I have a 1600 crossflow installed in an old boat ( a 1979 boat so I assume the engine is from the same year). It's been marinised to use river water for cooling so the exhaust manifold has a water outlet where gases mix with warm water from the engine and both go out the exhaust ( anyway I digress but photos below if your interested)
So i bought the boat in the summer when it was warmer and it struggled to start ( not first key turn) but once it started it sounded smooth. Problem was once it warmed up after an hours ride up the river, if you stopped at a lock and turned off the engine the thing wouldn't restart until it cooled down.
I had fuel and spark but the bugger just wouldn't start. All the parts were painted red like when the engine was installed in the boat so it doesn't look like anything had been changed since the 70s!!!!
So here goes, replaced oil, plugs, points and condenser. It ran better but still had the hot restart fault.
So, I replaced coil and ht leads. It ran better again, but still had the hot start fault. Still had fuel and spark but wouldn't restart when hot.
I rebuilt the carb with new seal kit but still I had the hot restart problem.
Then winter came and it wouldn't start at all even when cold. So I replaced the dizzy cap and rotor arm. Still wont start.
I advanced timing - wont start, retarded timing - wont start, went back to original timing and it started but was rough. Ran 5 mins then stalled at idle. Restarted fine and ran fine after that, so i turned off tje engine then guess what......wouldn't restart!!!@@
It seems like a sort of intermittant fault but has got worse in the cold.
In summary, I have spark and fuel, 3 x good batteries on split charge system so plenty of cranking power , I've replaced, plugs, points, condenser, coil, ht leads and rebuilt the fomoco carb but it still wont start. ANY IDEAS?????