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Marine Diagnostic Tools Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A)
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Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A)

$70

In stock at marinediagnostictools.com

This Cojali cable connects Jaltest Marine software to Mercury outboard and inboard engines with a 4 pin connector. Part number JDC603A is 6 inches long. It connects through the Jaltest OBDII Cable (JDC213M3) or the V9 Interface Link Adapter Cable (JDC213.9). At $70.00, it is a single-purpose cable rather than a kit.

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Highlights

  • Genuine Cojali part JDC603A
  • Covers Mercury outboard and inboard engines with a 4 pin connector
  • Works with Jaltest Marine
  • Length: 6 inches
  • Connects via the Jaltest OBDII Cable (JDC213M3) or the V9 Interface Link Adapter Cable (JDC213.9)
  • Also included in the Inboard and Outboard Cable Kit (70002008), Inboard Cable Kit (70002009) and Outboard Cable Kit (70002010)

Best for

Jaltest users servicing common Mercury engines.

Things to consider

  • It only works with the Jaltest platform; it is not a standalone scan tool.
  • If you need several cables, the Inboard may be better value than buying individually.

Key specs

Price$70
ManufacturerCojali
Part numberJDC603A
Length6 inches
PlatformJaltest Marine
Connects tothe Jaltest OBDII Cable (JDC213M3) or the V9 Interface Link Adapter Cable (JDC213.9)

Our take

A necessary, genuine Cojali link for Mercury 4 pin work if you already run Jaltest; confirm the part against your engine first.

Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A) at a glance

BrandMarine Diagnostic Tools
Price$70
TypeCables
AvailabilityIn stock at marinediagnostictools.com
ReturnsMaster and Gas Pro kits can be refunded within 30 days of delivery after tech support…

Price check

At $70, the Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A) is one of Marine Diagnostic Tools's more affordable items, whose 162 listed products run $1 to $5,600.

Buying from Marine Diagnostic Tools

Marine Diagnostic Tools is built for independent marine techs, boatyards, and fleet shops that want dealer-level diagnostics across many engine brands without buying each OEM tool. A boat owner with one engine brand may be better served by a single-brand MINI Scan Tool, or by a dealer visit. Before buying a full kit, call sales to confirm the total price, which cables you'll need, and the training required to qualify for the money-back guarantee.

Shipping
Most orders process the same day or within 3 business days, with orders placed after 11 a.m. processed the next business day. Shipping charges are calculated at checkout, and tracking is emailed when the order ships.
Returns
Master and Gas Pro kits can be refunded within 30 days of delivery after tech support troubleshooting and training enrollment. MINI kits can be returned within 30 days minus a 20% restocking fee; software, renewals, used kits, and customer-caused damage are not refundable.

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Frequently asked questions

What engines does the JDC603A cable work with?
The listing says it connects Mercury outboard and inboard engines with a 4 pin connector.
Do I need anything else to use it?
Yes. It needs the Jaltest diagnostic interface and software. It connects through the Jaltest OBDII Cable (JDC213M3) or the V9 Interface Link Adapter Cable (JDC213.9).
Is it part of a cable kit?
Yes. The seller includes it in the Inboard and Outboard Cable Kit (70002008), Inboard Cable Kit (70002009) and Outboard Cable Kit (70002010).
How much is the Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A)?
Marine Diagnostic Tools lists it at $70 on marinediagnostictools.com. We refresh prices throughout the day, but always confirm the final price at checkout.
What is Marine Diagnostic Tools's return policy?
Master and Gas Pro kits can be refunded within 30 days of delivery after tech support troubleshooting and training enrollment. MINI kits can be returned within 30 days minus a 20% restocking fee; software, renewals, used kits, and customer-caused damage are not refundable.
How long does Marine Diagnostic Tools take to ship?
Most orders process the same day or within 3 business days, with orders placed after 11 a.m. processed the next business day. Shipping charges are calculated at checkout, and tracking is emailed when the order ships.
Where can I buy the Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A)?
The Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A) is sold directly by Marine Diagnostic Tools on marinediagnostictools.com. The Shop now button on this page goes straight to the product there.
Is the Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A) in stock?
Yes. Marine Diagnostic Tools lists it as in stock on marinediagnostictools.com as of our latest check. Stock and prices refresh throughout the day.
Is Marine Diagnostic Tools a legit store?
Marine Diagnostic Tools is built for independent marine techs, boatyards, and fleet shops that want dealer-level diagnostics across many engine brands without buying each OEM tool. A boat owner with one engine brand may be better served by a single-brand MINI Scan Tool, or by a dealer visit. Before buying a full kit, call sales to confirm the total price, which cables you'll need, and the training required to qualify for the money-back guarantee. Our full Marine Diagnostic Tools review covers shipping, returns and what to check before ordering.
Is the Cojali Mercury 4 Pin Cable for Jaltest Marine (JDC603A) expensive?
At $70 it is on the affordable end of Marine Diagnostic Tools's range ($1 to $5,600 across 162 products).

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