Hi all you engine experts out there.
I have recently bought a narrowboat with a 1500 BMC Diesel engine.
It has started showing a tendency to overrev quite drasticaly for no apparent reason. When left at say 1500 rpm on a fixed throttle setting the revs will suddenly start to build and then become totally unreponsive to throttle adjustments. Only a shut down will prevent a meltdown. When restarted the engine will then appear to be OK again.
Any suggestions at what I should be looking for, checking?
Paul Jackson