Most 2 cycle outboards are in fact water cooled. There were a few air cooled models, in the smaller hp range, produced years ago. Though there may be an air cooled engine in current production, I am not aware of it.
Most outboard boat motors are water cooled to my knowledge
The 15 horsepower Mercury outboard motor does not have a water pump. The outboard motor is air cooled and does not have a need for circulating water.
The classic beetles were air cooled primarily because of cost. Air cooled engines are a lot more simple - there's no water pump, water jackets, thermostat, etc which makes the engines cheaper to produce.
Most oils nowadays are 50:1. The great thing now is that an air cooled engine two cycle oil often comes in a package that mixes a gallon of gas to the correct amount. Beware of outboard motor oil as those engines are water cooled, not air cooled (heat is different.)
The last YZ250 that was air cooled was 1981. 1982 is when they switched to water cooled engines.
it goes threw a cycle
Combustion Engines can be made either air-cooled or water-cooled. Radiators are only needed for water-cooled Engines. Small two stroke Engines are used in Bikes.On that external surface Fin type arrangement is made.This is enough to dissipate the heat from the engine as which is small
1.6 air cooled 1.9 air cooled 1.9 water cooled 1.6 diesel subaru engines loyal with less fitting 2.5 with more fitting there is good rebuilt engines on eBay air cooled but oversized like 2,1 L
Condensation
it goes threw a cycle
behind the cooling fan on air cooled engines or on the top left on water cooled
it goes threw a cycle