We have a Lister LPW4 engine which has had a problem since June,
The engine starts and runs fine, burns no oil, smokes a little when cold then clears up, and uses under 1l/hr
Recently when we first set off it will not rev over 800rpm for a few minutes,
Then it will suddenly burst into life and the engine revs start to climb and whe is back to normal.
It started on the Chesterfield canal, and we put it down to weeds and short cruises + long moorings with engine only charging batteries, but is has contiinued.
Yesterday we had a tricky manoevre getting off an angled pontoon mooring in high wind at Boston, and I had to run the engine in gear still tied up until the revs came up before even attempting to move off.
We then cruised for 5 hrs to Bardnay, no problems, but this morning, moving from the lock area to a pontoon, che resumed normal non-service.
I have cleared the water trap, replaced the fel filter, and put some injector cleaner into the tank, no real improvement.
Any ideas?