generally speaking if it has valves its a 4 stroke 4 cycle engine......if it doesnt have valves then it is a two stroke 2 cycle...................
This is a 2 cycle engine.
The 2 stroke, 25 hp Mercury outboard requires a 50:1 ratio, this is roughly one pint of 2 cycle oil, to six gallons of fuel.
The 1996 model, 9.9 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil to six gallons of fuel.
Need to know if its 2 or 4 cycle.
The non oil injected, 2 stroke model, 70 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
A 35 hp Mercury 2 stroke, requires a 50:1 ratio, one pint of 2 cycle oil to six gallons of fuel.
Mercury has made the 50 in both 2 cycle and 4 cycle. If it is oil injected and there is no oil that you change and no oil filter it is a 2 cycle engine where the oil is mixed with the gasoline.
'a 4 stroke engine cycle' is usually what it is called...
The 4 stroke Honda outboard is a 4 cycle engine using crankcase oil for lubrication, no fuel / oil mix is required.
The 1978 model, 115 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
If we are talking about a 2 stroke engine, a TCW-3 rated, 2 cycle oil is required. For a 4 stroke outboard, 10-40 wt. oil is usually recommended.
A 4hp Mercury outboard requires a 50:1 fuel to 2 cycle oil mix.