Marine Diagnostic Tools (MDT) is a U.S.-based company that provides professional-grade marine diagnostic systems to independent marine technicians, shop owners, and marina service departments. Our systems deliver dealer-level diagnostics for virtually every major marine engine brand — so you can diagnose, not guess.

"Never Guess A Marine Engine Issue Again." MDT gives independent techs the same diagnostic power as OEM dealers — across every brand, from one tool.

Our primary customers are independent marine repair technicians, marine shop owners, and marina service departments. We also offer the MDT Mini Kit for boat owners who want baseline diagnostic capability on their own watercraft.

• Phone: 844-627-4630 Ext 1
• Email: sales@marinediagnostictools.com
• Website: marinediagnostictools.com

• Master Kit — Diesel + Gas. Inboard, outboard, PWC, diesel generators. The most comprehensive kit
  available.
• Gas Pro Kit — Gas only. Inboard, outboard, and PWC. Covers the most common service scenarios.
• MDT Mini Kit — Compact Android-based tool. Covers Yamaha, Evinrude, Sea-Doo, Suzuki, Honda
  outboard/PWC, and Kawasaki PWC.

The Master Kit covers diesel and gas inboard and outboard engines, personal watercraft (PWC), and diesel generators. Included cables cover Cat, Cummins, John Deere, Volvo Penta Diesel, Yanmar, most outboard brands, OBDM, and PWC brands (BRP, Kawasaki, Honda, Yamaha with key programmer dongles).

The Gas Pro Kit covers gas inboard, outboard, and PWC engines. Included cables support most outboard brands, BRP, and the OBDM cable for Mercruiser, Volvo Penta (gas), Crusader, Ilmor, Indmar, and Malibu.

The Mini Kit covers Yamaha outboard and jet ski, Evinrude, Sea-Doo, Suzuki, Honda outboard and PWC, and Kawasaki PWC. It runs on a 5" Android touchscreen tablet with Wi-Fi and includes a 6-ft diagnostic cable and charger.

Yes. Upgrading to include diesel, inboard engines, jet skis, and generators requires an additional license fee and additional cables. Call us at 844-627-4630 Ext 1 or email sales@marinediagnostictools.com to get a quote.

All 3-year kit plans include: a ruggedized 12" tablet with easel, Jaltest Link V9 VCI (Bluetooth interface), carrying case, engine-specific cables, hardware warranty, software updates (3 major/year), interactive wiring diagrams, troubleshooting guides, TSBs, tech support, online training class, and a 1-on-1 onboarding session.

• Full ECM reprogramming / reflashing is not currently supported.
• You can reprogram injectors on certain engines.
• Throttle calibration, trim calibration, and similar functions are supported.
• Key reprogramming is supported for PWCs.

No — the core diagnostic functions work offline. However, an internet connection is required for: Troubleshooting by Symptoms, Troubleshooting by Fault Code, Vehicle Technical Data, and Technical Releases. Your phone's mobile hotspot works just fine.

The Jaltest-based software (Master Kit and Gas Pro Kit) is Windows-only (Windows 10 or 11). The MDT Mini Kit runs on Android and does not require a PC.

• Master Kit: $500 down. Monthly payments — contact sales for current rate. Total financed approx. $9,837.
• Gas Pro Kit: $500 down. $231.99/month (or $53.99/week). 36-month term. Total financed approx. $6,697–$6,972.
• MDT Mini Kit: $599 one-time. Extended warranty bundle: $899.

Yes — MDT offers in-house financing with no credit check required. A $500 down payment starts your 3-year plan. We do perform fraud verification checks and may ask for a copy of your driver's license or business license if something looks unusual.

Our team begins building and configuring your kit for shipment. You will receive a contract for the 3-year program via email, which must be signed before we ship. We will also set up your payment method and put a card on file for recurring payments.

No. There is absolutely no early payoff penalty.

Yes. Contact us for upfront pricing. Note that upfront purchases include only one year of support, updates, training, and repair information. You will also be subject to standard annual renewal price increases rather than the locked-in rate available through the 3-year plan.

We understand life happens — we are flexible. If you communicate with us, we are happy to move missed payments to the end of your term, re-cast the loan, or make other arrangements. If payments are missed without communication, a late fee will be applied, and after 3 missed payments with no contact we may deactivate the tool remotely and pursue collection.

Yes — MDT offers a 30-day money-back guarantee. To qualify for a return, you must complete both the online training class and the 1-on-1 training session.

Keyboards are available as an add-on for $110 but are NOT covered under any hardware warranty.

There is no required fee — your software will continue to function. However, after your 3-year plan ends (or after 12 months for standalone purchases), you will no longer receive software updates, technical support, or access to repair information without purchasing a renewal.

• Gas Pro Kit basic renewal: $635/year (software access and support only, no hardware warranty).
• Master Kit basic renewal: $1,000/year (software access and support only, no hardware warranty).
• MDT Mini software renewal: $90/year after the included 2-year period.

• Basic Renewal: Covers software updates and technical support.
• Plus Renewal: Covers software updates, technical support, AND added hardware warranty (available only during the initial 3-year plan, not after).
• To reinstate warranty coverage after the 3-year plan, you would need to upgrade to a new 36-month kit.

Yes — there is a 30-day grace period after your software renewal expires before access is cut off.

No extra fee — you only pay the standard renewal price whenever you're ready.

• Cojali (Jaltest) renewals
• Texa renewals
• Or call us at 844-627-4630 Ext 1.

• Server updates can take up to 24–48 hours (usually within 12 hours).
• Once MDT confirms the renewal is active on our end, try restarting the software while connected to the internet.

The days remaining are shown in the bottom-right corner of the software. You can also call us to confirm.

Yes — you can install the software on up to 3 computers. However, only one computer can be actively connected with the shared hardware at a time. Call us to walk through installing on an additional machine (your license must be current).

We always recommend keeping your software updated. However, if your license has expired and you click the update button, the software may lock up. Additionally, if you are not on the latest version before expiration, the software typically functions for about 6 months or until the next major update is released. Avoid manually changing your PC's date/time settings, as this can also cause the software to lock.

Each Mini Kit comes with a 2-year software license. After 2 years, a renewal is $90/year. The software continues to function after expiration, but you will lose tech support, new updates, and bug fixes.

Kits include the most commonly used cables for the covered engines, plus a pin-out (build-your-own) cable that can be configured for virtually any connection. However, there are over 80 different marine cables in the industry — additional cables are available for purchase if you regularly service less common engines.

Think of the pin-out cable as a "build-a-cable" kit. The software tells you exactly which pins to place to connect to a specific engine's diagnostic port. It works for most situations but requires a bit of assembly. Engine-specific molded cables are more durable and allow faster connections — ideal for high-volume shops.

• Use the Cable Finder on our website
• Check the cable listings inside the diagnostic software.
• Call us at 844-627-4630 Ext 1 — we're happy to help.

• Cojali cables
• Texa cables
• Or call/email us and we'll point you to the right one.

The standard kits cover gas engines. To diagnose John Deere Marine diesel engines, you would need to upgrade to the diesel/plus edition (approximately $750 additional) and also purchase the John Deere-specific cable.

Call us or visit the website — we stock replacement cables and can ship them out quickly for a nominal price.

The 3-year plan includes a full hardware warranty covering the diagnostic device (Jaltest V9), tablet, and cables.
It excludes physical damage, water intrusion, unauthorized third-party repairs, normal wear and tear, and keyboards/accessories.

No. Standard software renewals ($635 or $1,000/year) do not include hardware warranty. To reinstate warranty coverage, you would need to upgrade to a new 36-month kit plan. We will proactively reach out with upgrade options as your plan approaches renewal.

Yes — the Mini Kit includes 1 year of hardware warranty from the date of purchase. An extended warranty option (2 additional hardware years + 1 additional software year, for 3 years total) is available for $300 upfront or $9.99/month over 36 months.

• Operating System: Windows 10 or Windows 11 (32-bit or 64-bit) — Windows 11 recommended.
• Processor: Intel Core i5 or higher.
• RAM: 8 GB or more.
• Storage: SSD with at least 40 GB free (NTFS required).
• Display: Minimum 1366 x 768 resolution.
• Ports: USB 2.0 or higher, Bluetooth.
• Internet connection required for certain features.
• Need hardware? We can source a compatible laptop alongside your kit.

Yes — our support team uses TeamViewer for remote sessions. You will need an internet connection and will provide us with the ID and password shown in your TeamViewer window.

Yes — MDT now offers a trade-in and upgrade program for existing customers with aging hardware. You can receive up to $1,000 in credit (with V9 trade-in) toward a new 36-month kit, which also resets your warranty and gets you on the latest hardware. Call us to learn more.

• Online training class — provided after purchase, complete at your own pace.
• 1-on-1 live training session — scheduled after you complete the online class.
• Note: Both training sessions must be completed to qualify for the 30-day money-back guarantee.

• Step 1: Call MDT first (844-627-4630 Ext 1). We are your Level 1 support and resolve most issues directly.
• Step 2: If we need additional assistance, we will connect you with a Cojali (Jaltest) representative.

• Pick the manufacturer and model in the diagnostic software to see if it's listed.
• Use the cable finder
• Call us — we can check coverage instantly.

• Most orders ship same day or next business day depending on volume.
• Orders placed after 3:00 PM will not be processed or shipped until the following business day.
• Orders placed Friday after 11:00 AM will not be processed or shipped until the following week.

Yes — expedited shipping is available for an additional charge. Ask your sales rep at the time of order.

No — everything is pre-installed, licensed, configured, and tested before it leaves our facility. Unbox it and you're ready to go.

Our team will begin building your kit. You will receive a 3-year contract via email to review and sign before shipment. We will also collect payment method information and a card on file for your monthly payments.