What should be the compression of a 31cc 2 cycle engine?

The compression ratio of a 31cc 2-cycle engine typically ranges between 6:1 and 10:1, depending on the specific engine model and design. It's important to refer to the manufacturer's specifications for the recommended compression ratio for your particular engine.

Compression ratio is a crucial factor that affects the engine's performance, fuel efficiency, and overall power output. A higher compression ratio generally leads to increased engine efficiency and power, but it also places more stress on the engine components and requires higher quality fuel to prevent knocking or detonation.

Here are some common compression ratios for different types of 31cc 2-cycle engines:

1. Weed Trimmers and Blowers: Typically have a compression ratio between 6:1 and 8:1.

2. Chainsaws: Typically have a compression ratio between 8:1 and 9:1.

3. Leaf Blowers: Typically have a compression ratio between 8:1 and 10:1.

Again, it's essential to consult the manufacturer's recommendations or specifications for the exact compression ratio of your 31cc 2-cycle engine.