The following situations call for immediate replacement of spark plug wires: Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug. It is one of the simplest and cheapest ways to keep your mower running smooth for years to come. Today, I fired it up and loaded to the trailer. This causes an increase in the voltage required to fire the spark plug, which could damage the ignition coil as well as the spark plug wires. MOTOALL Ignition Coil Connector Plug Wire Harness Pigtail Wiring Loom 2-Way for Ford 4.6L 5.4L 6.8L 1991-2011 & Lincoln Mazda Suzuki - 8pcs 4.5 out of 5 stars 190 $12.99 $ 12 . To make things worse, I tried to cut little more insulation to expose the wire (metal or … Number 6768704. Re: Splicing a spark plug wire in reply to mkirsch, 11-28-2008 16:41:13 On the motor mower coil where the plug wire enters there is a screw end inside and the plug wire is screwed in, don't know about chainsaws.I'm speaking of old mowers. Thank you all. I have Honda harmony lawn mower. The wire end, connection to the spark plug (new plug) has corroded and broken off, so I need to replace the wire. If the spark plug wire on your Briggs & Stratton 5.5 HP engine has become worn or damaged, it’s time to replace it. Slide the wire and terminal into your crimp tool and squeeze firmly until the terminal tabs are folded over securely crimped to the spark plug wire. The new coil is now connected. Those are the four things a gasoline-fuel engine needs to run properly. I had a problem today, and am asking for a clarification on the spark plug wire. How To: Replace the spark plugs in a Saturn S-Series car How To: Install a New Cutting Blade on Your Lawn Mower How To: Add and Drain Oil from Lawn Mower Learn to Read Dip Stick How To: Keep Lawn Mower Snow Blower Carburetor Running Smoothly Varnish Ethanol Gas Turn boot counterclockwise to remove it from the old spark plug wire. 99 ($1.62/Item) Summary. Check to make sure you have a solid connection on the cable, this would also be a great time to check the resistance of each wire … I have a kohler 15hp ProCommand, single cylinder engine on my Exmark w/b mower. While it sounds pretty simple, the reality is that even vintage engines are quite picky about how each of these four items is attained. Next, re-attach the spark plug wire, start the lawnmower and then the engine should start running smoothly. Insert boot into the new spark plug wire and turn clockwise. This vide will show you how to fix a broken spark plug wire that has pulled out of the spark plug boot on your lawn mower. 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