## What ratio should a 2-Stroke outboard be?

For 2-Stroke outboards that require a 50:1 premix of oil/gas we’ve put together the following chart to simplify the calculations. Use ONLY 2-stroke outboard motor oil with an NMMA (National Marine Manufacturer’s Assoc.) certified rating of TCW3. Never use automobile motor oil in your 2-stroke outboard!

## What is the gas to oil ratio for a boat motor?

An Easy Gas to Oil Mixture Calculation Most two-stroke engines that are used for boats require a 50:1 ratio although there are a number of exceptions.

How much oil do I mix with gas for outboard motor?

### How much oil goes in a 2-stroke outboard?

2-Stroke Oil Mix Calculator For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas.

### How do you mix 2-stroke gas for a boat?

2-Stroke Oil Mix Calculator

1. For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas.
2. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas.
3. For a 32:1 mixture, use 4 fluid ounces of oil per gallon of gas.

What happens if you put too much oil in 2-stroke?

It’s important to get your fuel-to-oil ratios right when mixing two-stroke fuel. Too much oil, and your engine may struggle to start or run, generate carbon buildup on engine internals, blow clouds of smoke and perform poorly in general.

## Is it normal for a 2-stroke outboard to smoke?

Boat motors, especially two-strokes, commonly smoke because of an improper fuel to oil ratio or when the motor runs rich on fuel. When this happens, excessive blue-tinged smoke will come out the exhaust port, indicating too much oil is burning directly in the combustion chamber.

## How much oil does a 2-stroke outboard take?

2-Stroke Oil Mix Calculator For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas. For a 32:1 mixture, use 4 fluid ounces of oil per gallon of gas.

What happens if you put too much oil in a 2 stroke outboard?

Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power. While not ideal, these issues can be fixed by simply replacing the fuel in the tank with properly mixed fuel. But running a two-cycle engine with too little oil can actually destroy the unit.