Houdacai Forge

CrankTrace

Wireless Engine Diagnostics for Older Yamaha Outboards

Real-time engine data on your phone, tablet, or PC — no proprietary display or dealer software needed. Your engine, connected directly to the device you already carry.

Join the Beta
Beta opening soon · Launch late 2026 / early 2027
See what's inside

What It Is

Your Engine. Any Screen.

CrankTrace is a wireless diagnostic and display interface for older Yamaha outboard engines. The CrankTrace Gateway, a small module that plugs into your engine's diagnostic connector, bridges the engine's onboard data to any modern device — smartphone, tablet, or computer — without proprietary displays or dealership software.

Whether you're running offshore, idling in the bay, or troubleshooting at the dock, CrankTrace gives you a live view of how your engine is running. Temperature, fuel consumption, hours, fault codes — surfaced clearly, in real time, on whatever screen is closest.

Designed for boat owners who like to stay on top of their equipment. No subscription and no cloud dependency — your engine data stays with you.

CrankTrace dashboard showing live RPM, temperature, battery, and oil status for twin engines

Twin-engine dashboard, running live on the water

Highlights

What It Does

📟
Live Engine Dashboard
Real-time RPM, temperature, battery, gear, engine hours, oil and water-in-fuel status — single or twin engines, with a detailed diagnostics view for each.
⚠️
Fault Codes, Explained
Standard Yamaha fault codes as they happen, with a plain-English description of each.
🔧
Guided Component Tests
Check ignition, injectors, and pumps from your phone — testing that usually means a trip to the dealer.
✅
Trip Checklists & Logs
Pre-launch, departure, and return checklists, plus recorded engine data to review after the trip.
📶
Works Offshore
Connects straight to your phone, or through your boat's WiFi. No cell signal or account required.
➕
And More
More tools are in the app, and we'll share more as launch gets closer.

Connectivity

How It Connects

How CrankTrace connects The engine's diagnostic connector plugs into the CrankTrace Gateway. The Gateway connects to your phone either directly over its own WiFi, or through your boat's WiFi router or Starlink. Your engine diagnostic connector CrankTrace Gateway Direct WiFi · no router or internet needed Phone offline Boat WiFi / Starlink Phone keeps internet How CrankTrace connects The engine's diagnostic connector plugs into the CrankTrace Gateway. The Gateway connects to your phone either directly over its own WiFi, or through your boat's WiFi router or Starlink. Your engine diagnostic connector CrankTrace Gateway Direct Boat WiFi Phone no router needed WiFi / Starlink Phone keeps internet

Twin engines: a Gateway on each engine, linked wirelessly — your phone connects once and sees both.

📡 Direct

Your phone joins the Gateway's own WiFi — no router, internet, or cell signal needed. The simplest setup, and ideal offshore. Your phone stays offline while connected this way.

🛥️ Through Your Boat's WiFi

Join the Gateway to your boat's WiFi or Starlink once, and your phone keeps its internet connection while you monitor your engines.

Both modes support single and twin engines, and the app picks the right one automatically.

CrankTrace detailed diagnostics view showing engine parameters, temperatures, and status for both engines

Detailed diagnostics for each engine

CrankTrace launch checklist with all items complete
Launch checklists
CrankTrace component test menu for ignition, injectors, and pumps
Guided component tests

FAQ

Common Questions

What does CrankTrace do?

The CrankTrace Gateway — a small module that plugs into your engine's diagnostic connector — reads data from the engine's computer and sends it wirelessly to your phone, tablet, or PC. You see live engine data in real time — RPM, temperatures, battery voltage, engine hours, oil and water-in-fuel status — plus fault codes and guided component tests.

Which Yamaha outboards does CrankTrace work with?

CrankTrace is designed for Yamaha EFI four-stroke and HPDI two-stroke outboards from roughly 1999 to 2012 that have Yamaha's 3-pin diagnostic connector — from the F30 through the V6 and V8 four-strokes, plus the HPDI V6 family. Newer CAN-bus engines (such as VMAX SHO and 2013-and-later digital-control models) and carbureted engines aren't supported. We're testing across the engine family now and will publish a full list of supported engines closer to launch. Not sure about yours? Email [email protected].

Can I read Yamaha outboard fault codes without a dealer?

Yes. CrankTrace reads the standard Yamaha fault codes stored by your engine's computer and shows them as they happen, with a plain-English description of each. We're adding more detail on what each code means and its common causes — a helpful starting point, not a substitute for a qualified marine mechanic.

How does CrankTrace compare to dealer diagnostic tools?

CrankTrace displays the same live engine data and runs the same kinds of diagnostic tests found in common Yamaha diagnostic tools — wirelessly, from the device you already carry, with no laptop or special cable. It's built for owners doing their own checks and troubleshooting; it doesn't reprogram or modify your engine.

Does CrankTrace work with twin engines?

Yes. Each engine gets its own Gateway, and the two link together so your phone connects once and shows both engines side by side in real time, with a detailed diagnostics view for each. Component tests run on one engine at a time.

Do I need internet on the boat?

No. Your phone can connect directly to the Gateway's own WiFi with no router, internet, or cell signal. If you have boat WiFi or Starlink, the Gateway can join that network instead so your phone keeps its internet connection.

When will CrankTrace be available?

The Gateway hardware is complete and the app is nearing beta. The beta is opening soon, with launch targeted for late 2026 / early 2027. Use the Join the Beta button to request a spot.

Join the Beta

We're looking for boat owners to help us test CrankTrace across more of the Yamaha engine family. If you run one of these (roughly 1999–2012 models), we'd especially like to hear from you:

Tell us your engine model and year, and we'll be in touch as beta spots open.

Join the Beta

Not ready to test? Email [email protected] and we'll let you know at launch.

Release Status

Where We Are

Software — validated against real hardware
✓
Concept & Spec
✓
Protocol R&D
●
Core App
↑ Nearing beta
Beta App
Launch
Late 2026 /
Early 2027
Hardware — complete
✓
Concept
✓
Electronics Design
✓
Prototype
✓
Beta Units
Launch
Late 2026 /
Early 2027

The Gateway hardware is complete and the app is being validated against live engine data. The software is nearing beta — use the Join the Beta button above to request a spot.

V1.0 targets older Yamaha outboards. Additional makes and models are planned post-launch.