# How to Adjust Ignition Timing on the OKMO B02 Engine Guide?

**URL:** <https://www.vortrixecommunity.com/t/how-to-adjust-ignition-timing-on-the-okmo-b02-engine-guide/50>\
**Category:** Help and Guides\
**Tags:** tag\_question\
**Created:** [April 20, 2026, 2:51am UTC](https://www.vortrixecommunity.com/t/how-to-adjust-ignition-timing-on-the-okmo-b02-engine-guide/50 "2026-04-20T02:51:32Z")\
**Posts on this page:** 1\
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**Author:** ![Jude-Vortrixe](https://yyz2.discourse-cdn.com/flex028/user_avatar/www.vortrixecommunity.com/jude-vortrixe/32/32_2.png) [@Jude-Vortrixe](https://www.vortrixecommunity.com/u/Jude-Vortrixe)\
**Post date:** [April 20, 2026, 2:51am UTC](https://www.vortrixecommunity.com/t/how-to-adjust-ignition-timing-on-the-okmo-b02-engine-guide/50/1 "2026-04-20T02:51:32Z")

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If your B02 isn’t starting or just doesn’t feel right, there’s a good chance it’s down to ignition timing.

These little engines are pretty sensitive — even a small shift in timing can make them hard to start or run poorly.

I’ll walk you through how I usually check and adjust it, plus a quick explanation of what’s actually going on.

[![](https://canada1.discourse-cdn.com/flex028/uploads/vortrixe/original/1X/e3b3ae55468c1f3509d9ac54d96ae0ba3ceadade.jpeg "Ignition timing adjustment of OKMO B02 engine | Vortrixe") ](https://www.youtube.com/watch?v=VGEr32w_5sA)

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# 🧠 How the B02 Engine Works (Quick Breakdown)

Before touching anything, it helps to understand the basics.

Like most small engines, the B02 runs on a **4-stroke cycle** :

- Intake → pulls in the air-fuel mix

- Compression → squeezes it

- Power → spark ignites it

- Exhaust → pushes gases out

👉 The key moment is at the **top of the compression stroke (TDC)**

That’s when the spark should fire.

If it’s too early or too late → the engine either won’t start, or just runs badly.

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# ⚠ Why ignition issues happen

Most of the time, it’s not a major failure.

👉 It’s usually something simple like:

- contact switch slightly shifted

- small mechanical movement during handling

- tiny misalignment

These things don’t take much to throw timing off.

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👉 The good news:

🔥 **It’s usually a quick fix**

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# 🔧 What you can adjust

There are basically two things to look at:

1. Contact gap

2. Ignition timing position

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# 🪛 Step 1 — Check & adjust the contact gap

This is always the first thing I check.

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## How to do it:

Use tweezers and gently move the spring plate:

- up or down  
 → this changes the contact gap

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## Tips:

- Make very small adjustments

- Don’t force anything

- Check spark after each change

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👉 If you get a consistent spark after this:

✔ You’re done

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# ⚙ Step 2 — Adjust ignition timing

If you have spark, but it’s happening at the wrong time, this is where you fix it.

* * *

## How to adjust:

- Use a **1.5mm screwdriver**

- Loosen the slider screw

- Move the slider slightly

* * *

## Direction matters:

- Move LEFT → spark happens earlier (advanced timing)

- Move RIGHT → spark happens later (retarded timing)

* * *

👉 Again:

👉 small moves + test each time

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# 🧪 Final check

Once everything is lined up:

- spark should happen at the right moment

- engine should fire normally

* * *

👉 When timing is correct, you’ll notice:

- smoother running

- easier starts

- more stable performance

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# 🔥 Final thoughts

These engines don’t need big adjustments — just small, precise ones.

👉 The real trick is:

🔥 **adjust a little → test → repeat**

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Once it’s dialed in, the B02 runs great.

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👉 If yours is still acting up, feel free to share what it’s doing (or a video) — happy to take a look 👍