How to do-it-yourself instructional on basic tune up of Tecumseh mower engine. Demonstrates troubleshooting a fouled spark plug and solving by increasing operating speed. Today on Repairs101 I’ve got my ten year old mower on blocks and I’m going to show you how to pim it out. just kidding. You don’t have to block yours up as high as I did. put it up on a couple of bricks or on the edge of your workbench. first thing I’m going to tell you but not show you is “Run it dry”. I run it dry every time. pull the sparkplug out pull the wire off, push it aside. socket wrench easy, spin it out have a look. quite clean some blackness but no large deposits. the insulator around electrode in centre, not cracked, Inspect insulator, here’s the insulator. That’s the electrode. sparkplug is blackened, a bit fouled. most likely cause overfuelling/ rich fuel condition. Reasons for a blackened spark plug include things like too rich fuel mixture or sticking choke or clogged air cleaner, anything going to increase the fuel in the fuel : air ratio. good possibility is oil seeping past the rings on the compression piston and getting up into the combustion chamber and fouling it. quick compression test had the sense to hold onto literature came with lawn mower ten years ago spark plug thirty-thou. thirty-thou nothing wrong with gap. Clean it up with a soft wire brush reuse it. looked around online find specifications for this engine. new machine make about eighty psi Sixty psi is generally agreed …
Video Rating: 5 / 5