You can find it here along with other diagrams and parts for the Gnat.
file:///Users/spc71/Desktop/Marine%20Parts%20Plus%20Mercury%20Serial%2040%204%20GNAT%202%20CYL%2074059%20472-6.html
A 9.8 hp Mercury outboard, serial number 4387693, is a 1976 year model. The carburetor used on the 15 hp model, is of a completely different design, and will not interchange with the 9.8 (110) model.
A 65 hp Mercury outboard, serial number 4574019, is a 1976 year model.
1976
A 65 hp Mercury outboard, SN 6315551 would be a 1976 year model.
50:1
There is no gap to set on most '76 Mercs Even if there were there is no clear way to answer the question since there are at least a dozen different models made by Mercury in 1976
Mercury outboards manufactured in 1976 require a 50:1 ratio, roughly one pint of 2 cycle oil, to six gallons of fuel.
The 1976 year model, (ser.#4420321), 4.5hp Mercury outboard, requires a 50:1 fuel, to 2 cycle oil ratio. Mixing one pint of oil, to six gallons of fuel, will be a good mix.
10R76R is a 1976 model, 9.9 hp Johnson outboard.
show me vacuum diagram on 1976 malibu
Your mercury 110 engine falls within the engine number range 3795658 to 4691221. So your number is 4305943 and is roughly half way, so I would guess it is 1975 as the range is 1974 to 1976.
50:1