• ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires • ✓ Free Shipping on All Orders • ✓ 30-Day Money-Back Guarantee • ✓ Works on Any Gas Engine • ✓ Diagnose in Seconds — No Wires

Free Shipping

On every order, always

30-Day Returns

No questions asked

Hand-Assembled

Family-built, USA quality

How It Works

Step 1 — Power On
Press the button. Green light confirms the device is ready.

Step 2 — Hold Near the Plug
No contact. No wires. Just hold TruSpark close to the spark plug wire.

Step 3 — Read the Lights
🔴 Red = High voltage is present    🔵 Blue = The plug is firing
Diagnose in seconds. Not hours.

Why TruSpark?

  • Diagnose in Seconds

    No more guessing. TruSpark tells you instantly whether it's a spark, ignition, or fuel related — two LED lights, zero confusion on where to look.

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  • Works on Any Gas Engine

    Motorcycles, Harleys, ATVs, snowmobiles, lawn mowers, boats, generators — if it has a spark plug, TruSpark works on it.

  • No Wires. No Mess.

    Completely wireless. Hold it near the plug wire, read the lights, done. No tools, no disassembly, no mechanic bill.

Built in a Basement. Born From Frustration.

My dad spent 30+ years wrenching on motorcycles, ATVs, mowers — you name it. Every time something wouldn't start, he'd waste hours tearing things apart before figuring out it was just a bad plug, or no power, or a fuel issue. He got sick of it and built a better way.

TruSpark is the result. Three lights. Three answers. Seconds, not hours. We hand-assemble every unit ourselves and stand behind every one we sell. This is still the Founders Batch — $89.99 while they last. Regular price is $119.99.

Built for Anyone Who Works on Engines

Whether you're a weekend mechanic, a Harley rider, a farmer with a broken mower, or a small engine shop running 10 jobs a day — TruSpark cuts through the guesswork. It works on motorcycles, ATVs, snowmobiles, lawn mowers, generators, boats, and any gas engine with a spark plug. If it runs on a spark plug, TruSpark works on it.

Get TruSpark Pro — Founders Batch: $89.99

TruSpark Pro - Wireless Spark Plug Tester

$119.99
$89.99
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Frequently Asked Questions

What does TruSpark do?

TruSpark tells you whether high voltage is reaching your spark plug (red light) and whether the plug is actually firing (blue light). This lets you instantly determine if your no-start problem is electrical, the spark plug itself, or fuel and air related — without touching a single wire.

What engines does it work on?

Any gas-powered engine with a spark plug: motorcycles, Harleys, ATVs, snowmobiles, lawn mowers, riding mowers, generators, boats, and any small engine.

What do the lights mean?

🟢 Green — Device is powered on and ready
🔴 Red — High voltage is present at the spark plug wire
🔵 Blue — The spark plug is confirmed firing

Red with no blue = bad spark plug. No red = no power reaching the plug. Red + blue = electrically good.

Do I need to remove anything to use it?

No. TruSpark is completely wireless. Just hold it near the plug wire while the engine cranks — no disassembly, no contact, no wires needed.

What is the return policy?

We offer a full 30-day money-back guarantee. If TruSpark doesn't help you diagnose your engine, return it for a full refund — no questions asked.

Founders Batch: $89.99 — Price Goes Up When They're Gone

We're selling the first batch at the founders price. Once these units are gone, TruSpark goes to its regular price of $119.99. If you work on engines — even just your own — this tool pays for itself the first time you use it.

Get TruSpark Pro — $89.99