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Need help?Do you have a question about the MINN KOTA MK-1-DC and is the answer not in the manual?
The Minn Kota Onboard DC Alternator Battery Charger is a powerful electrical device designed for charging and maintaining lead-acid batteries. It is specifically intended for use with FLOODED/WET CELL, MAINTENANCE FREE, and AGM/STARVED ELECTROLYTE batteries. This charger is not designed to supply power to low voltage electrical systems other than for charging and maintaining batteries, nor is it suitable for charging dry-cell batteries, which could burst and cause injury or damage.
The primary function of the Minn Kota Onboard DC Alternator Battery Charger is to efficiently charge and maintain 12-volt 6-cell lead-acid batteries using input from an engine alternator. The charger comes in various models (MK-1-DC, MK-2-DC, MK-3-DC) that support different numbers of battery banks, allowing for the charging of multiple trolling batteries in addition to a starting battery. Each output bank operates independently and is isolated, meaning the charger can charge individual batteries or combinations of batteries hooked in series or parallel without requiring disconnection from any switches or wires joining them.
To achieve full output, the charger requires a minimum input from the engine alternator, with specific amperage requirements for each model (12 amp minimum for MK-1-DC, 25 amp minimum for MK-2-DC, and 35 amp minimum for MK-3-DC). The charger's operation is initiated when the ignition key is turned on, providing a +12V source to the purple ignition wire.
The charger incorporates several safety features, including protection against reverse polarity connections for both the input and output leads. If a reverse polarity connection is detected, a RED indicator light will illuminate, prompting immediate disconnection and corrective action. The internal circuitry is designed to handle incorrect battery connections without blowing fuses, although inline fuses are present on the leads near the ring terminals to protect against surges and short circuits caused by a damaged charger output cable.
The Minn Kota charger is designed for permanent mounting and connection to batteries. When installing, it is crucial to select a mounting location that is well-ventilated and not directly above batteries, as corrosive gases can damage the charger. It should also not be mounted below the waterline of the boat or directly adjacent to fuel tanks. A minimum of 6 inches of unobstructed area around the unit is recommended for proper air circulation and cooling to ensure peak efficiency.
Connecting the batteries involves identifying the input cable labeled "STARTING" and connecting its POSITIVE (RED) wire to the POSITIVE (+) terminal of the starting battery and the NEGATIVE (BLACK) wire to the NEGATIVE (-) terminal. Similarly, each output cable's POSITIVE (RED) wire should be connected to the POSITIVE (+) terminal of a trolling battery, and the NEGATIVE (BLACK) wire to its NEGATIVE (-) terminal. If trolling batteries are connected in series (e.g., for 12/24 - 24V, 24 - 24/36 - 36V systems), the series connection wire should remain in place during charging.
The charger provides clear indicator lights for operational status:
In case of a RED light indicating reverse polarity, the input cord should be disconnected immediately, and the connection corrected. If troubleshooting issues persist, users are advised to contact the Minn Kota Service Department for assistance.
Regular maintenance is essential for the longevity and safe operation of the Minn Kota battery charger. Users should periodically check the battery charger for dirt, oil, and battery corrosion. Cleaning can be done using a water and baking soda solution, followed by wiping with a dry cloth.
The ring terminals should also be inspected for dirt, oil, and corrosion. If found, they should be disconnected from the battery posts, cleaned with a water and baking soda solution, and dried with a clean cloth before re-connecting.
Battery fluid levels should be checked every 30 days. When adding distilled water to battery cells, it should be done ONLY AFTER the battery has been charged to prevent acid leakage. Overfilling should be avoided. All cell caps must be replaced after refilling to prevent water evaporation. For valve-regulated lead-acid batteries without removable cell caps, the manufacturer's recharging instructions should be followed carefully.
It is crucial to never charge a frozen battery. Additionally, when working near lead-acid batteries, personal precautions such as wearing eye and clothing protection, having fresh water and soap nearby, and avoiding smoking or sparks are highly recommended due to the risk of explosive gases and corrosive acid. Removing personal metal items like rings and bracelets is also advised to prevent short circuits and severe burns.
The charger's inline fuses should be replaced with the exact type and rating of the original fuse if they blow. The maximum extension length for DC battery leads is 15 feet, using 12 AWG (minimum) wire, and a fuse holder should remain within 7 inches of the battery terminals.
General| Output Voltage | 12V |
|---|---|
| Output Amperage | 1A |
| Number of Banks | 1 |
| Battery Compatibility | 12V Lead-Acid |
| Charger Type | Onboard |
| Charging Stages | 3 |
