Petter Mini Twin



Yes there are some still about.
Mine has started vibrating badly. It starts , runs , accelerates , and drives the boat, but not as quickly as it should do. It has been recently overhauled and so the the compression is OK and the injectors have been serviced. Could it be pump timing? can it be changed? I've noticed that there is some exhaust smoke (not steam) light grey in colour, this to me suggests unburnt fuel, I can't see any fuel leekd although one of the return pipes did keep coming off- now fixed.
Any ideas?