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Compression Tester Extension 12Mm
MFR Model# EXTENSION CT12
Overview
| Wrench-free compression test extender allows for exhaust system and baffling clearance. |
Features
- Quality welded construction, o-ring seal
- Makes compression testing easy!
Specifications
- 12 mm thread size
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! ).
Necessity with most ROTAX engines.
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Compression Tester Extension 12Mm
Nice tool, dont forget to order other adapters for aviation plugs
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.
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
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Compression Tester Extension 12Mm
Q&A
Please note, Aircraft Spruce Australia'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 Australia 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.
Yes, it will work on a Rotax.
o-360's should be 18mm. If you have automotive plugs it would be 14mm.
Yes, it will.
