6 ways to create a go-kart with a mower motor

Table of contents:

6 ways to create a go-kart with a mower motor
6 ways to create a go-kart with a mower motor
Anonim

Although traditionally go-karts use horizontally mounted motors (with a little modification), it is possible to install a vertical axis mower motor to be the driving force behind a homemade racing machine. You can re-test the speed, freedom and adrenaline of an open road by converting a mower engine into the go-kart you've always wanted.

Steps

Method 1 of 6: Remove the Motor from a Lawn Mower

Create a Go Kart with a Lawnmower Engine Step 1
Create a Go Kart with a Lawnmower Engine Step 1

Step 1. Drain the oil

Depending on the engine you're using, you may need to get a pair of pliers to disconnect the spark plug wire and remove the oil drain plug. Use a suitable container to drain the oil and clean up any spills.

It is best to drain the oil from an engine when it is a little warm, as heat allows a faster flow than when it is cold

Create a Go Kart with a Lawnmower Engine Step 2
Create a Go Kart with a Lawnmower Engine Step 2

Step 2. Drain the fuel

Loosen the clamp on the fuel hose before starting to drain the fuel. You can do this by tracing the hose path from the engine to the bottom of the tank. Notice where the hose connects to the mower's carburetor. Use pliers to loosen the clamp, and then slide it up over the hose. Now, you can disconnect the hose and drain the fuel into a bucket.

Create a Go Kart with a Lawnmower Engine Step 3
Create a Go Kart with a Lawnmower Engine Step 3

Step 3. Locate the throttle connection

You can usually find the throttle connection under the carburetor. You will find a cable that you must connect to the throttle. By removing the screw that holds the cable in place, you can easily remove the throttle connection.

Create a Go Kart with a Lawnmower Engine Step 4
Create a Go Kart with a Lawnmower Engine Step 4

Step 4. Find the starter motor

This piece is located on the side of the motor and will be shaped like a small can. The electric starter of the mower will have a red battery connected. You can use a wrench to loosen the cable from the starter motor.

Create a Go Kart with a Lawnmower Engine Step 5
Create a Go Kart with a Lawnmower Engine Step 5

Step 5. Remove the necessary nuts and bolts

At the base of the mower motor is the frame, which is where the motor normally sits. Place a wrench on the bolt and use another to hold the nut under the frame of the mower. Next, unscrew the bolts that hold the motor in place.

Create a Go Kart with a Lawnmower Engine Step 6
Create a Go Kart with a Lawnmower Engine Step 6

Step 6. Remove the drive belt

You will find this belt on the crankshaft pulley under the engine. Lean the engine forward slightly and pull the drive belt off its pulley.

Create a Go Kart with a Lawnmower Engine Step 7
Create a Go Kart with a Lawnmower Engine Step 7

Step 7. Remove the motor

Grasp the motor firmly with both hands, lift it from the mower frame and carefully set it aside in a safe place.

Method 2 of 6: Prepare for Installation

Create a Go Kart with a Lawnmower Engine Step 8
Create a Go Kart with a Lawnmower Engine Step 8

Step 1. Measure the size of the motor

You are going to need a kart frame that is capable of accommodating the size and weight of the engine. Most 5 to 7 horsepower engines will fit a standard size kart. The vertical shaft motor you choose can be from a hand mower or a tractor-mower. Both can be used for the go-kart.

Larger engines in the 13-22 horsepower range (typically found in a mower-tractor) can destroy the transmission or go-kart

Create a Go Kart with a Lawnmower Engine Step 9
Create a Go Kart with a Lawnmower Engine Step 9

Step 2. Choose a suitable go-kart frame

You should look for one that can comfortably support the mower's vertical axis motor and gearbox. The gearbox must have a transmissionless shaft configuration.

Create a Go Kart with a Lawnmower Engine Step 10
Create a Go Kart with a Lawnmower Engine Step 10

Step 3. Use chalk to draw a basic life-size design of the frame

This will give you a better idea of the dimensions that will be comfortable for the frame.

Most of the frames have a width that varies between 1/3 and 2/3 of the distance between the axles of the kart, and the wider models provide better stability

Method 3 of 6: Assemble the Frame

Create a Go Kart with a Lawnmower Engine Step 11
Create a Go Kart with a Lawnmower Engine Step 11

Step 1. Cut out the bumper frame and drill holes for the tube padding

You should round the edges of the bumper by connecting the vertical pieces that are attached to the frame and the horizontal piece parallel to the rear piece of the frame with a short connector cut at a 22.5 degree angle. Drill holes for the tube padding in the rear of the bumper.

Drill 5/16 inch (8 mm) centered holes through the bumper cushion padding 1 1/8 inch (7 cm) from the end of the padding

Create a Go Kart with a Lawnmower Engine Step 12
Create a Go Kart with a Lawnmower Engine Step 12

Step 2. Install the axle

Cut a 1 by 1-inch section of square tubing and weld the bolts at the ends. A 6 inch (15 cm) bolt will be located on the driver's side of the kart, while a 4 inch (10 cm) bolt will be located on the passenger side. Weld the axle under the base of the frame.

You should always wear the proper protective equipment when welding. Otherwise, this could pose significant harm to you

Create a Go Kart with a Lawnmower Engine Step 13
Create a Go Kart with a Lawnmower Engine Step 13

Step 3. Install a floor

A 16 gauge piece of sheet metal should be sufficient for the go-kart floor. Use the drawings above to drill holes in the sheet metal for the seat retaining bolts.

Create a Go Kart with a Lawnmower Engine Step 14
Create a Go Kart with a Lawnmower Engine Step 14

Step 4. Weld on a clamp for the seat

You should hook both outside sides of the kart frame with 3/16 gauge flat plate. This is where you will install the bench for the seat.

Method 4 of 6: Assemble the Steering Column, Tabs, and Axle Brackets

Create a Go Kart with a Lawnmower Engine Step 15
Create a Go Kart with a Lawnmower Engine Step 15

Step 1. Cut and install the steering column

You will need to cut a 3/4 x 11 gauge section of pipe and weld it to the steering tabs. Insert an additional 1 inch (2 cm) spacer loosely along the axle near the steering ring, turning the axle slightly near the ring if it is too tight. Drill a three-hole pattern with the holes equidistant from the center of the washer on the end of the axle.

Create a Go Kart with a Lawnmower Engine Step 16
Create a Go Kart with a Lawnmower Engine Step 16

Step 2. Cut the steering ring and relieve the derailleur clamp

Make your cuts at a 39-degree angle for the hoop. At this point, you should verify that all measurements on the steering mount are correct and allow a full range of motion for the kart.

The ring and shaft should be located at a 90 degree angle to each other

Create a Go Kart with a Lawnmower Engine Step 17
Create a Go Kart with a Lawnmower Engine Step 17

Step 3. Add rest tabs for the brake and throttle

These 2-inch long, 3/8-inch diameter tabs hold the pedals in their rest positions and fully forward. The tab closest to the center of the frame should be attached a maximum of 1 cm (½ inch) past the cross piece that the steering column is attached to. The second tab should be installed 3.5 cm (1 3/8 inch) after the first.

Create a Go Kart with a Lawnmower Engine Step 18
Create a Go Kart with a Lawnmower Engine Step 18

Step 4. Attach the axle brackets

You are going to weld them to the front axle of the kart. The axle should have a clearance of 2 cm (1 inch) above the front axle.

Create a Go Kart with a Lawnmower Engine Step 19
Create a Go Kart with a Lawnmower Engine Step 19

Step 5. Install a footrest

Use a 3/8-inch rod in a vise to hammer it into the shape of the passenger footrest, if applicable. This will prevent your feet from resting on the reinforcement bars.

Create a Go Kart with a Lawnmower Engine Step 20
Create a Go Kart with a Lawnmower Engine Step 20

Step 6. Don't forget the brake band bolt

This bolt will serve as a pivot for the brake band. Weld a 3/8-inch round bar to the 1.5-inch (4-cm) frame after the axle.

Method 5 of 6: Assemble the motor mount, brake rod, and accessories

Create a Go Kart with a Lawnmower Engine Step 21
Create a Go Kart with a Lawnmower Engine Step 21

Step 1. Install the motor mount

Make sure the grooves in the motor mount allow it to slide slightly forward. Then, fix the bracket in place. Dimensions are deliberately not included here, as the size of the bracket may change depending on the engine.

  • The motor bracket needs to be welded together as the final step to build the kart.
  • The bracket must be able to hold the mower motor in the horizontal position.
Create a Go Kart with a Lawnmower Engine Step 22
Create a Go Kart with a Lawnmower Engine Step 22

Step 2. Attach the lug of the throttle cable guide

About 4 inches (10 cm) from the center of the accelerator pedal bolt hole, weld this tab to the kart at a 45 degree angle.

Create a Go Kart with a Lawnmower Engine Step 23
Create a Go Kart with a Lawnmower Engine Step 23

Step 3. Install the guide tab on the brake rod

Take the brake rod and thread it onto the flange, bending it to fit the brake band. Then, take the tab with the rod inserted and solder it to the kart.

Create a Go Kart with a Lawnmower Engine Step 24
Create a Go Kart with a Lawnmower Engine Step 24

Step 4. Bend the brake rod to shape it

Bend this ½-inch (½-cm) round rod so that it forms an angle and matches the brake pedal assembly. Cut the length of the brake rod as needed and weld the eyebolts to the rod with a spring loaded brake pedal installed.

Create a Go Kart with a Lawnmower Engine Step 25
Create a Go Kart with a Lawnmower Engine Step 25

Step 5. Install a seat

Many kits do not bolt the seats directly to the kart. If this is the case, you should use a simple frame and screw it onto the seat clamps. You should cut the seat at a 37.5 degree angle to get a 105 degree tilt for the backrest.

Create a Go Kart with a Lawnmower Engine Step 26
Create a Go Kart with a Lawnmower Engine Step 26

Step 6. Choose the side rails

There are many different designs you can use, but the traditional side railing is made up of three pieces joined together to form a rectangular railing with the side and back of the frame.

Side rails are an optional addition to the kart

Create a Go Kart with a Lawnmower Engine Step 27
Create a Go Kart with a Lawnmower Engine Step 27

Step 7. Weld the motor bracket and attach the accessories

Once you are done with the go-kart body, you can now weld the bracket to the frame. Once the welding is complete, you can add tires, seat padding, and all other necessary equipment to the vehicle.

Method 6 of 6: Install the Vertical Motor and Gearbox

Create a Go Kart with a Lawnmower Engine Step 28
Create a Go Kart with a Lawnmower Engine Step 28

Step 1. Screw the motor and gearbox to the bracket

The location of the engine is not as important as that of the gearbox. To properly install the gearbox, you need to align it with the gear on the rear axle and then screw it into place.

Create a Go Kart with a Lawnmower Engine Step 29
Create a Go Kart with a Lawnmower Engine Step 29

Step 2. Change the gearbox pinion size

A pinion is a gear sprocket inside the gearbox that controls the gear ratio, which is another name for the gearbox. Your target gear will have about 16 teeth.

Create a Go Kart with a Lawnmower Engine Step 30
Create a Go Kart with a Lawnmower Engine Step 30

Step 3. Use the slip clutch on the mower hand strap

One end of the clutch must be installed on the engine, with the protruding side of a pinion that connects to the gearbox. If you don't have a manual belt slip clutch, you can get a centrifugal clutch from your local auto parts store and use it instead.

The ratio of the engine to the transmission should be 1 to 1

Create a Go Kart with a Lawnmower Engine Step 31
Create a Go Kart with a Lawnmower Engine Step 31

Step 4. Connect a throttle cable to the throttle link on the carburetor

Now you can clean all the oil residue from the kart, but do it carefully. You should always wait long enough for the materials you are going to work on to cool down (such as the motor or welding) before applying a cleaning product.

Advice

  • This simple go-kart should meet the needs of the average user. However, the average user may find it difficult to convert a vertical axis motor and drive the horizontal axis plane.
  • Most karts use a centrifugal clutch and horizontal shaft motor, and not a mower motor. Using the proper motor will make installation easier.
  • If, instead, you want to buy a used horizontal shaft motor, you can consult local classifieds for industrial equipment, such as pressure washers, mulchers, brush cutters and generators. These machines usually use horizontal axis motors.

Warnings

  • When welding, you must wear all appropriate safety equipment (including a welding mask, gloves, and tight-knit clothing).
  • Wait until the engine cools down before refilling the fuel or oil tank to avoid explosions and fires.
  • Drive the kart only on your own property or designated areas. You are probably unknowingly breaking the law if you drive it on the streets.

Popular by topic