compression test
in 912 / 914 Technical Questions
7 years ago
I need a tool. Has anyone used the Stanley Proto JFP210M Proto Differential Cylinder Pressure Tester.
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by Roger Lee » 7 years ago
It "should" work. Specs on this thing are hard to come by.
https://www.amazon.com/Stanley-JFP210M-Differential-Cylinder-Pressure/dp/B00BNSJEI2
or
http://www.aircraftspruce.com/catalog/topages/15-05209.php?clickkey=31031
You may want one of these to. Compression tester extension.
http://www.aircraftspruce.com/catalog/topages/extension12mm.php?clickkey=55415
Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell
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by David HEAL » 7 years ago
It is my understanding that small cylinder bore engines such as the ROTAX 912 are best evaluated by a compression tester with an appropriately-sized* differential orifice. Lockwood, CPA, LEAF, ACS, etc. all sell this tester. Make sure it has the 12 mm adapter required to fit the 912's spark plug holes.
* See 912 Line Maint Manual: Orifice jet*, of 1mm (0.04 in) inner diameter and 3 mm (0.12 in) length. * or equivalent e.g. orifice diameter 0.040 in., long 0.0250 in., 60° degree approach angle according to AC43.13, latest issue
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