Air cooled two strokes tend to run at a higher temp and have greater variations in temp due to ambient conditions. Once up to temp a water cooled motor should remain at a constant temp internally. Improves the abilty to tune it, also improves engine life as there is a greater control over tollerences, not so much of a compromise.

If you have a hot air cooled two stroke and you throw a bucket of cold water on it you can seize it.

And outboard motors vent their exhaust into the water so thats where the oil goes and that would definately warrant a different formulation.


If anyone would like to take mechanical related advice from someone who knows about electrical thats fine. And a teacher no less. Cant comment on this person in particular but there is something sepcial about someone who never leaves school. I know a guy who drove Coaches for 20 years, he now teaches warehousing courses and B-double licences by parroting what he learnt in books. Look out world.

Two stroke motors need two stroke oil. Not sure how you would even keep Fish and Chip oil mixed in petrol.
Just like diesels run on diesel. Enviro fuel used to do my mate a roarin trade.