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Precise-Gap Sparkplug Gapping Tool

$70.75/Each
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Part# 12-11600

Overview

A simple tool to gap 2-,3-or 4 electrode 18mm spark-plugs. Only 2" overall, comfortably handheld. Precision made of stainless steel. 'T' handle adjusters move the ground electrodes closer to the center electrode until wire feeler identifies proper gap. Adjusters have fine thread with ball tips for precise movement.
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Reviews

There are many gap setting tools out there, however: This one is a gem! Its small, so it fits in a tool kit or glove box, and can set your massive electrode plugs precisely (this is NOT intended for use with projected nose (BY) and fine wire type plugs). The trick is to close the gap until a .015 wire wont slide through the gap, then screw the T handle out and recheck the gap with the .015 and .016 (or .018) wires. After a few tries, youll develop a feel for how the electrodes spring back a thousandth or two. I use the Blue Point (Snap-On) wire gauge set.

Gelston A Verified Purchase

Precise GAP Sparkplug Set Tool

April 1, 2026

John H Verified Purchase

Precise GAP Sparkplug Set Tool

December 2, 2025

Works great

Christopher A Verified Purchase

Precise GAP Sparkplug Set Tool

October 14, 2025

Robert C Verified Purchase

Precise GAP Sparkplug Set Tool

November 21, 2024

again, perfect little tool

Michael G Verified Purchase

Precise GAP Sparkplug Set Tool

October 2, 2024

Works very well. Makes setting gaps a breeze!

Joseph J Verified Purchase

Precise GAP Sparkplug Set Tool

September 2, 2023

Natron A Verified Purchase

Precise GAP Sparkplug Set Tool

February 22, 2023

Only pushes, doesnt pull.... but does work well. Just dont over do it.

Skyward V Verified Purchase

Precise GAP Sparkplug Set Tool

January 14, 2022

Ralph C Verified Purchase

Precise GAP Sparkplug Set Tool

July 27, 2021

works easily and as intended.

Dave
September 14, 2020

Q&A

Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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