Electrical problems are the most common ones that we see in repair shops. Skilled small engine specialists frequently have difficulties when they are face with such problems. These electrical problems are difficult to diagnose because factories teaches you voltage, when that is seldom the cause of the problem.
In most cases, the problem is with current flow. One fine such example is a starter motor that is not turning. In many cases, people purchase a brand new starter just because they happen to measure 12 volts with their VOM (Volt Ohm Meter) at the motor. Later on they are back at the shop claiming they have a new defective motor, because the new one is also reluctant to turn. Well, what is the problem if they indeed have 12 volts at the motor?
Current flow is similar to the water flow through a pipe. The battery is similar to the water pump pressing the water in the pipe (through the wire). Let’s consider the water wheel a starter motor. To make the wheel turn, it needs a specific amount of water. The water in the pipe can be measured in two ways, voltage (pressure) and current (Volume).
The pipe is designed to be able to deliver sufficient water (volume) to make the wheel turn when there is adequate pressure to drive it through the pipe. Now, place a cork with a tiny whole in it at the last part of the pipe. The measured pressure (voltage) will be the same, although the volume (current) of water passing through the cork is insufficient to make the wheel turn.
Let’s return to the starter motor. Our VOM measures 12 volts at the motor but because of loose connections (for instance resistance, similar to the cork in the above example) or corrosion the current flow is not enough to turn the motor. In several cases, the problem is at return path to the battery and not with the delivery of current to the starter motor.
A faulty engine ground for instance. When you are looking for the cause of a certain electrical problem, it is recommended to use the ground of the machine you are testing for your VOM as well.
The above mentioned tips can be successfully applied to virtually any electrical devices. In 90% of the cases the problem is with a corroded or loose connection. Keep in mind the current flow and you will be able to repair most electrical problems you face.
Atco Motor Mower ad, 1922
Atco Motor Mower ad, 1922 – Woman in dress pushing a motorized lawn mower. Vintage 1920s Ads from The Sphere Royal Marriage Number, honoring wedding of Princess Mary & Viscount Lascelles, 1922.
By DominusVobiscum on 2009-07-31 02:42:59
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In today’s video I am going to show how to make mini DIY lawn mower.
12-24V Lathe Press Motor http://goo.gl/XTbTJg
8000mAh Power Bank http://goo.gl/yFW688
Power Male Plug Jack Adapter http://goo.gl/z1yz1r
100mm Black/ White Nylon Cable http://goo.gl/aW2B6Z
Foam Tape http://goo.gl/1iwppJ
Carving Rasps http://goo.gl/to8kYQ
20pcs Rocker Switchs http://goo.gl/7wlnhc
DC PWM Motor Speed Controller http://goo.gl/omre7N
Steel Screws Nuts Assortment Kit http://goo.gl/ISLui4
Silicone Wire Cable(black) http://goo.gl/RtNJUD
Silicone Wire Cable(red) http://goo.gl/NDLk0s
In my case it is an upgraded version of a lawn mower with a power bank, rotation speed regulating unit, etc. In case if you can’t buy all of that, you just could make the same lawn mower with a speed rotation regulating unit and a power bank. You need to find a motor and a power supply unit)) Guys and girls, I hope you will like the idea and will repost the share the video. I hope it won’t be much of a bother! Good luck to everyone! Have a good mood because it is summer!!)) Hurrah!!)
Main channel: http://www.youtube.com/user/romanursuhack
Welcome to my channel Roman UrsuHack where you will learn how to make hand made crafts, New Year crafts, presents, toys, Halloween scares. The main thing is that one can make it at home and with one’s own hands.
You are interested in handiwork, craft or you just have nothing to do, haven’t you? You have found the channel you really need. Here you can find lots of crafts, hand made items, and the main thing is that they all made of make-shifts and at the lowest cost!