
Adding an electric start kit to an outboard motor can be a straightforward process, requiring cables to the battery and control wires for the key and neutral interlock. The electric start kits are available for purchase online, and some users have reported successfully installing them themselves, although it is recommended to consult a professional for assistance if needed. The kits typically include a battery cable, starter motor, push-button switch, start-in-gear protection switch, fuse box, regulator, starter relay, and brackets. The process involves removing the manual start system and following the provided instructions for the specific kit. It is important to note that electric starts rely on a battery, so regular maintenance and charging are necessary to ensure the system functions properly.
| Characteristics | Values |
|---|---|
| Installation | Straightforward mechanical installation |
| Requirements | Cables to battery, control wires for key and neutral interlock, charging circuit, and a range of tools |
| Benefits | Quick and efficient engine start, stable performance, greater torsion, and convenience |
| Cost | Electric start kits range from $94.95 to $473.32, with additional parts costing around $100 |
| Reliability | Redundancy is important with boats; having both electric and manual pull start options is ideal |
| Maintenance | Requires regular charging and tune-ups to maintain performance |
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What You'll Learn

Buy an electric start kit
If you want to convert a manual start, tiller handle engine to an electric start, you can buy an electric start kit. These kits are available for 4-stroke outboard engines and specific models such as Yamaha 8HP outboards. The kits typically include a battery cable, starter motor, push-button switch, start-in-gear protection switch, fuse box, regulator, starter relay, and brackets.
You can purchase electric start kits from online retailers such as Amazon, Boats.net, and OutboardDirect.com. Prices can vary depending on the kit and retailer, ranging from around $100 to $300.
When purchasing an electric start kit, it is important to ensure that it is compatible with your outboard motor. Additionally, you may need to buy additional tools and parts for the installation, such as a knife, sockets, extensions, batteries, and battery boxes.
It is recommended to carefully follow the instructions provided with the kit for a safe and proper installation. The process typically involves removing the manual start system, installing the new components, and making the necessary connections.
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Remove the manual start system
Removing the manual start system from an outboard motor can be a complex process, and it is recommended that you consult a professional mechanic if you are unsure about any part of the procedure.
Firstly, you will need to disconnect the cables. Remove the cowling from the engine to access the cables more easily. You should then be able to disconnect the cables by popping out the rubber grommet at the bottom of the engine housing. Be cautious when handling these cables, as they are essential to the functioning of the motor.
Next, you will need to address the steering linkage. This can be disconnected by pulling out the pins. However, it is important not to interfere with the steering or control box, as this could cause issues.
At this point, you should also check the electrical wiring. Some outboards have electrical wiring that is hardwired, making it challenging to disconnect. If this is the case, you may need to consult a professional.
Finally, you will need to remove the manual start components, such as the pull cord and any associated mechanisms. This step may vary depending on the specific model of your outboard motor. Be sure to refer to your engine's manual or seek advice from a qualified marine mechanic if you are unsure about any part of this process.
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Install the starter motor
To install the starter motor, you will need to first remove the manual start system. Tilt the motor out of the water and remove the three bolts holding the pull start mechanism on the flywheel. Then, install a ring gear on the existing flywheel, an OEM equivalent starter, and a starter solenoid. You will also need to purchase or salvage a flywheel, a starter motor, and a bendix. If you are using a salvage flywheel, make sure it is the correct one for your motor.
Next, you will need to mount the starter motor. This will require a starter motor mount. Once the starter motor is mounted, you can connect the starter relay. This will go on top of the bracket and is held in place with one bolt. The starter relay has a rubber block that slides onto the arms of the stay.
Now, you will need to connect the battery cables. These will run from the battery to the starter motor and the control wires for the key and neutral interlock. If you do not want to install a charging system, you can use a small auto-cranking battery and charge it with a solar panel.
Finally, you will need to install the starter button. To do this, remove the choke control arm from the lever, the battery cable guide bracket, and the insert and grommet where the switch goes. Cut a small square out of the rubber grommet for the choke control. You will also need to cut out the slop on the other grommet to run the battery cables through. Run the cables under the cable guide and screw it back in place.
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Mount the start-in-gear protection switch
To mount the start-in-gear protection switch, you must first remove the bracket to put the switch on, then put the bracket back on. This typically involves removing and replacing two bolts. The switch is usually the black thing with two brown wires.
The start-in-gear protection switch is a critical safety feature for outboard engines. It prevents the engine from starting when in gear, which could otherwise cause sudden acceleration and endanger those on board. This feature is mandated by the U.S. Coast Guard and the American Boat and Yacht Council (ABYC) for outboard engines developing more than 115 lb. of static thrust, which is equivalent to about 3 horsepower.
After mounting the bracket and the start-in-gear protection switch, the next step is to mount the starter relay on top of the bracket. This is secured with a single bolt, and the starter relay has a rubber block that slides onto the arms of the stay.
Finally, the fuse holder stay is mounted, and the fuse holder is placed on it. The fuse holder typically has an extra fuse, and the fuse extractor will mount on the manual pull start mechanism once all other components are in place.
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Connect the battery cables
To connect the battery cables, you will need to have purchased a battery and a battery box. You can get a small 3 AH motorcycle battery, a battery box, and a solar panel for recharging the battery for around $100 on Amazon. Alternatively, a system that charges the battery will cost around $50.
You will also need to have purchased an electric start kit. These are available from sites such as Boats.net and Amazon, and prices start from around $300.
Once you have the kit, the battery, and the battery box, you can begin the installation. First, tilt the motor up and out of the water to make it easier to work on and to prevent tools or bolts from falling into the water. Then, remove the manual start system. There should be three bolts holding the pull start mechanism onto the flywheel.
Now you can begin to connect the battery cables. Run the battery cables under the cable guide and through the grommet. Then, place the start-in-gear protection switch for the electric start. The manual system utilizes a cable on top of the pull start mechanism that frees up the wheel when the motor is in neutral. The electric start has a button that is pushed by the gear mechanism when in neutral.
Next, remove the bracket to put the switch on, then put the bracket back on. The switch is the black thing with two brown wires. Now, mount the starter relay on top of this bracket. There is one bolt and the starter relay has a rubber block that slides onto the arms of the stay.
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Frequently asked questions
Adding an electric start to an outboard can make it easier for you or others to start the engine. It can also be a safety feature if you get hurt and are unable to start the engine yourself.
You will need an electric start kit, which typically includes a battery cable, starter motor, push-button switch, start-in-gear protection switch, fuse box, regulator, starter relay, and brackets. You may also need cables to the battery and control wires for the key and neutral interlock.
You can buy electric start kits for outboards from online retailers such as Amazon and Boats.net, as well as from specialist retailers such as OutboardDirect.com.
The price of an electric start kit for an outboard can vary depending on the retailer and the specific kit, but they generally range from around $100 to $400.











































