The Yamaha 55hp outboard typically features a compression ratio of approximately 8.5:1. This ratio can vary slightly depending on the specific model and year of the engine. It's important to refer to the owner's manual or the manufacturer's specifications for the exact compression details for a particular model. Proper compression is crucial for optimal engine performance and efficiency.
Mine is 100:1, however best ring the dealership to make sure,
The 55 hp model Yamaha requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
This is a 2 cycle engine.
The 55hp Johnson outboard is designed to operate on a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
50:1 is usual, 32:1 is also OK according to some.
Ignition System ComponentI'm not familiar with your engine, BUT... from your description that component into which the coil wire and the spark plug wires are plugged is called a "Distributor Cap."
The maximum speed of the 1961 Fiat 1100 4cyl 55hp is 75 MPH.
The maximum speed of a 1962 Renault gordini 1093 4cyl 55HP was 65mph or 104.60kph.
The maximum speed of a Peugeot 204 wagon 4cyl 55HP 1972 is 81 miles per hour.
50:1
The 805cc v-twin Suzuki has 52-55hp.
90mph