Description
Product Overview
The MaK 9.01.7-91.21.00-08 is listed within the family of circuit cards used in legacy MaK engine-control equipment. These assemblies are relevant to marine diesel engine automation, where dedicated electronic boards support monitoring, switching, and control functions. However, the exact functional assignment of this particular part-number suffix remains unconfirmed in the available documentation. It should therefore be identified by its full part number and physical markings rather than by assuming it performs the same function as a similarly numbered card.
For maintenance teams, the main concern is whether the replacement board matches the installed system electrically and functionally. MaK documentation for related plug-in cards describes configurable speed-switching functions, including overspeed signaling and engine-related switching operations. That documentation establishes the wider application context, but it does not establish that model 9.01.7-91.21.00-08 has those same functions.
Before ordering, compare the installed card’s label, revision, connector keying, component layout, and any associated legacy reference number. Ask the supplier to provide clear photographs and confirm the exact part number on the board itself. If the card is intended for an operational engine, replacement planning should also account for the consequences of a control-system fault, the availability of an approved test procedure, and the need to verify correct operation after installation.
Product Introduction
The MaK 9.01.7-91.21.00-08 is a legacy electronic board intended for use in a compatible MaK control-system assembly. Its precise role should be established from the equipment documentation or a verified match with the installed board.
When sourcing this component, do not treat other 9.01.7-91.21-series cards as interchangeable solely because their part numbers are similar. Differences in switching logic, relay outputs, or engine-control responsibilities can affect system operation. Confirm compatibility with the original equipment configuration before installation.
Key Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | MaK / Caterpillar-associated marine engine equipment |
| Product model | 9.01.7-91.21.00-08 |
| Product category | Electronic PCB / plug-in card |
| Application | Legacy marine engine control equipment |
| Exact functional role | Not independently verified |
| Input voltage | Not independently verified |
| Output signals | Not independently verified |
| Communication interface | Not independently verified |
| Mounting method | Plug-in card format is used by related system cards; exact configuration requires confirmation |
| Operating temperature | Not independently verified |
| Firmware / revision | Confirm from the installed board label and system records |
| Condition | Confirm actual condition with supplier |
The technical specifications above deliberately distinguish confirmed product identification from details that still need verification.
9.01.7-91.21.00-08
Related Products
The following are related MaK control-system part numbers found in available references. They are useful for identifying the surrounding equipment family, not proof of direct interchangeability.
- MaK 9.01.7-91.21.00-10 — Related circuit-card reference.
- MaK 9.01.7-91.21.00-11 — Listed as a motor-control plug-in card.
- MaK 9.01.7-91.21.00-14 — Related PCB card reference.
- MaK 9.01.7-91.21.00-16 — Documented in material concerning speed-switching functions.
- MaK 9.01.7-91.21.00-17 — Referenced in legacy engine-monitoring documentation for a speed-switching application.
Frequently Asked Questions
Q1: What is the MaK 9.01.7-91.21.00-08?
It is identified as a MaK engine-control system PCB or circuit card. Its exact function within the system has not been independently confirmed.
Q2: Is this card used in marine diesel engines?
The part belongs to a MaK engine-control equipment family associated with marine applications. Verify the specific engine model and control-system configuration before purchasing.
Q3: Can the 9.01.7-91.21.00-11 or -16 replace the -08 version?
Do not assume so. Related cards can have different control logic or output functions. A substitution requires an approved parts reference or confirmation from the equipment manufacturer or qualified service provider.
Q4: What supply voltage does this board require?
The exact voltage for the -08 version has not been verified. Check the equipment schematic, board markings, and the installed card’s technical documentation before applying power.
Q5: What should be checked before ordering?
Confirm the full part number, board revision, connector arrangement, associated engine-control system, and any superseding part number. Request photographs of the actual item and supporting test information.
Q6: Can a used board be installed directly?
Not without appropriate inspection and compatibility checks. For critical engine-control equipment, follow the approved maintenance procedure, isolate the system as required, and perform the prescribed functional checks after installation.
Q7: What condition should be specified when sourcing this component?
Ask whether the item is new, unused old stock, refurbished, or used. For refurbished or used boards, request the test scope, test results, and details of any replaced components. Confirm actual condition with supplier.
