![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232785_26.jpg)
I am sure that at least once in your life you needed a portable 220 V generator. With the help of it you needed to power something in conditions where a regular network is not available. In general, a gasoline generator itself is an extremely useful thing, and it can be useful even at home, taking into account the not frequent, but sometimes, power outages for one reason or another.
Buying a new device is quite expensive, but if you have a broken trimmer with a working motor lying around in your workshop, you can use it and make a generator based on it.
Will need
- Gasoline engine from a brush cutter. It is advisable to use four-stroke models.
- The engine from an electric lawn mower is used as a generator. It is quite capable of working in the opposite direction - generating electric current. Other instances can also be used.
- A pair of pulleys.
- Traction force transmission belt.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232834_1.jpg)
Idea
The idea is this: to place the engines parallel to each other. And the rotation is transmitted by means of a belt drive.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232756_2.jpg)
Before implementation, I decided to check how the motor from a lawn mower generates current. I rotate its shaft with screwdrivers.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232829_3.jpg)
As you can see, a 40 Watt 220 V incandescent lamp is used as a load. Of course, a screwdriver cannot produce the speed required for sufficient reproduction, however multimeter shows at a maximum of 156 Volts. But this is a preliminary result.
Making a gasoline generator from a lawn mower engine
Let's move on to implementing the idea. First of all, we remove the flywheel casing with the mount where the rod was previously inserted and, using a grinder, we saw off its nose to completely open the shaft.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232794_4.jpg)
The centrifugal clutch is assembled in the same unit.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232821_5.jpg)
It is necessary to select a pulley to match the size of this shaft. Unfortunately, I didn't find any suitable ones. So I took the pulley and fitted it with a bushing of threaded connectors.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232761_6.jpg)
I checked how it would fit.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232812_7.jpg)
I used a grinder to cut off the excess.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232783_8.jpg)
Using a round file, I ground down the inner surface to size.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232766_9.jpg)
I drilled a hole in the side and tapped it.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232761_10.jpg)
I picked up the bolt.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232817_11.jpg)
Then I ground off the shaft on one side.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232833_12.jpg)
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232831_13.jpg)
We put on the pulley and tighten it with the side bolt.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232750_14.jpg)
We screw the assembly to the engine.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232772_15.jpg)
The pulley was matched to the generator almost exactly. A hole was also drilled on the side, a thread was cut and a bolt was selected for fixing.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232791_16.jpg)
Now it was decided to make a frame from a galvanized profile. We take measurements and determine the size of the entire structure.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232782_17.jpg)
We weld the frame. We drill holes for mounting the generator.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232811_18.jpg)
We fasten the engine mount with self-tapping screws.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232771_19.jpg)
And then the engine itself.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232762_20.jpg)
We secure the motor with bolts and nuts.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232754_21.jpg)
Since the gasoline engine shaft experiences lateral belt load, it was decided to make additional oblique fasteners and weld them into the frame.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232831_23.jpg)
We put the belt on the pulleys.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232780_24.jpg)
Disconnect the throttle control cable. And the speed will be further regulated by the idle rod.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232824_25.jpg)
From the board we make a connection and control panel.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232796_27.jpg)
We attach a voltmeter, a network adapter and a button to it. We solder the wires from the engine responsible for the ignition to the button, so that when necessary the engine can be stopped.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232822_29.jpg)
Check in operation
We start the engine. By adjusting the idle speed we set the output voltage at the generator output to around 220 V.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232814_30.jpg)
We connect various loads. The voltage drop is not significant.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232818_31.jpg)
I can’t say about the power of the installation itself, but I think it’s quite possible to get 200-300 watts from it.
![How to make a 220 V generator from a trimmer engine](https://i.washerhouse.com/uploads/posts/2019-05/1557232785_26.jpg)