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Compression Tester Extension 12Mm

$37.50/Each
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Part# 05-06883
MFR Model# EXTENSION CT12

Overview

Wrench-free compression test extender allows for exhaust system and baffling clearance.
   
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Features

  • Quality welded construction, o-ring seal
  • Makes compression testing easy!

Specifications

  • 12 mm thread size
  • Frequently Purchased With
  • Customers Also Viewed

Reviews

Walked into the Peachtree City Aircraft Spruce today (10/03/2024), and purchased this 12mm compression tester extension for my Rotax 912. After reading the two negative reviews that said this extension did not fit the Rotax 912, I was expecting to have to grind away some of the tool to provide cylinder head clearance. However, the 12mm extension I received had a much smaller diameter than what is shown online and in the catalog. It worked perfectly on all 4 cylinders of my Rotax 912. If you buy one of these for the Rotax 912, be sure to specify that you want one with the narrow diameter (or be prepared to grind! ).

Keith B
October 3, 2024

Nice tool, dont forget to order other adapters for aviation plugs

Fombell A
May 15, 2020

It won’t fit a Rotax 912 engine. The threads are correct, but the tool head is too large and interferes against the spark plug opening. If you try to tighten it the tip will remain wedged in the spark plug opening and you’ll have to extract it with needle nose pliers.

James I
October 2, 2024

I cannot get this to spin into any of my 12mm Rotax 912iS spark plug holes. I have two engines, it wont work on either of them

Darryl Z Verified Purchase

Compression Tester Extension 12Mm

December 12, 2023

Q&A

Please note, Aircraft Spruce'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 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.

Q: Will this Compression Tester Extension 12MM work on a Rotax engine? 12mm x 1.25mm Threads

Yes, it will work on a Rotax.

Q: What size does the O-360 series typically take? I purchased the 18MM and it is the wrong size.

o-360's should be 18mm. If you have automotive plugs it would be 14mm.

Q: Will this compression tester extension 12mm connect to compression tester model 2EM part # 12-02346?

Yes, it will.

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