The essentials in 30 seconds
- Out of the water: rinse the motor with fresh water, remove fishing line from the propeller, disconnect the battery before any handling.
- Propeller and transducer cone: inspect the sacrificial anode each season; clean or replace if worn to less than half its original thickness. Tighten propeller nut to 16.27 N·m.
- Cables, hinge, locking mechanism: check and lubricate before the motor sits idle all winter. On the Force Current, inspect the pull cord and pulleys.
- Rebelcell battery: charged to 70 %, fully disconnected, stored dry between 0 and 45 °C, inspected every three months. Never charge below 0 °C.
- A lead-acid battery follows the opposite rule: keep it charged. Details are in our sailboat winterizing checklist.
- In spring, Garmin’s maintenance list is used to prepare the season: complete it before the first outing if not already done during winterizing.
Contents
Scope of this guide — and what it does not cover
This guide covers winterizing an electric fishing motor — Garmin Force Kraken, Pro or Current — and its Rebelcell lithium battery, after standard haul-out before the first frosts. It does not cover thermal outboards, nor the boat’s house battery. For a house battery (lead-acid or lithium), navigation displays and sensors, see our sailboat electronics and battery winterizing checklist. The Lowrance Ghost X is not covered here: Skysat sells its service parts, not complete motors. Instructions are taken from Garmin and Rebelcell manuals, read on October 1, 2026. The workshop has not yet winterized this equipment itself, and this text makes no such claim.
After removal from water: rinsing and initial inspection
After use in salt or brackish water, Garmin requires rinsing the entire outboard with fresh water and then applying a water-based silicone spray with a soft cloth. On the Force Kraken and Force Pro, the instructions are strict: never direct a jet of water at the gearcase cover. You risk forcing water inside. The Force Current follows the same method, but more loosely: rinsing is "recommended" rather than "mandatory," and jets should be avoided on the engine as a whole rather than specifically on the gearcase cover, which it does not have.
Before storing the engine, remove any fishing line or debris tangled in the propeller. And above all: always disconnect the engine from the battery before touching the propeller, propeller assembly, electrical connections, or electronic housings. This safety instruction is identical in all three Garmin manuals.
Workshop note. Garmin presents the following maintenance list (anodes, cables, hinge) as a seasonal preparation to be done before relaunching the engine. There is nothing to prevent you from doing it now: the engine is already out of the water, dry and accessible, and you avoid the spring rush.
Propeller and transducer cone: checking the anodes
Sacrificial anodes protect the metal parts of the engine from electrolytic corrosion. Garmin requires inspecting them each season: clean with a wire brush or sandpaper if they are still at least half their original size; replace them otherwise.
For the propeller anode, the procedure is the same on all three engines. Loosen the nut at the end of the propeller using a 9/16 in (15 mm) socket, remove the propeller and washers, then inspect the anode: clean or replace it depending on its condition. Reassemble the unit and tighten the nut to 16.27 N·m (12 lbf·ft).
The Force Kraken and Force Pro house a second anode inside the transducer cone, at the front of the engine where the transducer (GT56UHD-TR on integrated-sonar versions) is mounted. To access it, first remove the skeg under the engine (4 screws, 4 mm hex key), then the screw securing the transducer and cone (3 mm key). Next, remove the screws from the front of the cone (4 mm key): the anode appears, held by a 3 mm key. Engines built after 2024 secure it with two screws instead of one. The Force Current has no integrated transducer cone: its manual only describes a propeller anode.
| Engine | Propeller anode | Transducer-cone anode | Tools |
|---|---|---|---|
| Force Kraken | yes, nut to 16.27 N·m | yes (under transducer GT56UHD-TR) | 9/16 in socket, 3 mm and 4 mm hex keys |
| Force Pro | yes, nut to 16.27 N·m | yes, same procedure | 9/16 in socket, 3 mm and 4 mm hex keys |
| Force Current | yes, nut to 16.27 N·m | no: no integrated transducer cone | 9/16 in socket, 3 mm hex key |
Sources: Garmin Force Kraken, Force Pro and Force Current manuals, section « Servicing/Checking the Anodes ».
Cables, connectors and mechanics
Beyond the anodes, each Garmin manual lists maintenance specific to the motor’s design.
Force Kraken: inspect the coiled cable for signs of wear and check the power cables, cleaning them if necessary. Grease the hinge with marine grease, then clean and grease the pedal and the locking bar that allow the motor to be stowed and deployed.
Force Pro: same approach, with additional parts. Clean and tighten the power terminals, grease hinges and bushings, check the rails and the mounting stop (replace if necessary) and the stabilizer pads if fitted. Finally, inspect the coiled cable and the traction cable.
Force Current: this kayak motor deploys via a rope and is controlled by a pedal, not a remote. Rope side: stopper knot at the latch and handle, latch mobility, condition of the pulleys, handle and rope along its entire length. Mounting side: eye straps, cleat, screws holding the bracket to the kayak, condition of this surface, motor bracket and pivot knobs. Electrical side: power cable along its entire length, connector (corrosion, bent pins) and its protective cover. On the pedal, finally: screws securing the rails and battery compartment, to check for breakage and corroded contacts.
Storing the motor
Once maintenance is complete, disconnect the motor from the battery and store it in a dry place, protected from the elements. Garmin specifies a very wide storage temperature range for the motor’s electronics, from -40 to 85 °C. This does not restrict the choice of storage location in France: it is the battery that imposes its own limits, detailed below. The Force Current, being lighter (10.1 kg motor alone, 12.6 kg with bracket and cable), is easy to transport and store indoors between outings.
Rebelcell lithium battery: storage charge and temperature
Rebelcell provides a precise method for storing an EDGE battery for more than a few weeks. Charge it to 70 % of its capacity, disconnect all equipment, and store it in a dry place between 0 and 45 °C. Then check the charge every three months using the Rebelcell BT app, and recharge if it falls below 50 %. The battery cannot charge below 0 °C: a charger plugged in on a frosty morning will do nothing. At the other extreme, prolonged use above 40 °C reduces service life, and the battery will shut itself off at 55 °C.
| Battery | Charger |
|---|---|
| Rebelcell 12V EDGE (75, 105, 210 Ah) | 14.6 V / 20 A or 14.6 V / 35 A (CC/CV profile) |
| Rebelcell 24V75 EDGE | 29.2 V / 20 A |
To disconnect a charger safely, Rebelcell follows the reverse order of the charging process: turn off the charger, unplug its power cord, and only then disconnect the battery cables. Never use crocodile clips to connect equipment to the battery, and always install a fuse between the two. A battery switch like the Blue Sea e-Series simplifies this winterization disconnection compared to repeatedly loosening terminals. The EDGE battery remains a dangerous good for transport (ADR class 9); this topic is detailed in our guide to choosing a lithium battery for an electric motor.
Lead-acid battery, if you still have one
Some older installations, or an auxiliary circuit on board, may still use a lead-acid battery rather than a Rebelcell. The storage principle is reversed: a lead-acid battery must remain charged, never flat, to prevent sulfation and electrolyte freezing in very cold conditions. The precise figures per manufacturer (Victron, Mastervolt), including their specific voltage and temperature thresholds, are already detailed in our winterization checklist for electronics and batteries on a sailboat. We do not repeat them here to avoid duplicating outdated information.
Limits and pitfalls
- Maintenance is a warranty requirement. Garmin explicitly states that routine maintenance is necessary to maintain the warranty.
- Disconnect before touching the propeller. This is a safety warning repeated in all three manuals, not just a recommendation.
- The battery’s BMS will cut power without warning if the battery operates outside its charge, discharge, or temperature ranges. This is not a failure; it is a protective function.
- Do not confuse the two temperature ranges. The motor tolerates -40 to 85 °C when at rest; it is the battery that imposes the real lower limit, 0 °C for charging.
- No winterization procedure for this equipment has yet been documented by the Skysat workshop. This article is based solely on the manuals cited as sources.
Spring recommissioning
If the motor maintenance checklist (anodes, cables, hinge, locking mechanism) was not completed when the boat was hauled out, now is the time. Garmin presents this as preparation for the upcoming season. For the battery, charge the EDGE to 100 % before the first outing and check the charge state in the app before reconnecting the equipment. A dockside test, with the motor deployed and the propeller clear, confirms everything is functioning before heading offshore or onto the water.
Sources
- Garmin: user manual Force Kraken (v7, November 2025), Force Pro (v3, August 2026) and Force Current (v3, July 2026), sections “Maintenance Needs and Schedule” and “Servicing/Checking the Anodes”.
- Rebelcell: user manual EDGE 12V75/105/210 LiFePO4, §4.1, §4.4, §4.6 and §7.
Disclosure: Skysat distributes Garmin, Rebelcell and Blue Sea Systems; links point to our catalog. This article is neither sponsored nor reviewed by the brands mentioned.
