The conventional 2-1/4" Manifold gauge is lightweight with a slim design and uses a single diaphragm. The newer 3-1/8" and 2-1/4" gauges incorporate a dual diaphragm design which improves the longevity and reliability of the instrument. Standard markings are black and white.
2-1/4" UMA Mechanical (10-05564)
Case: Valox 420 Plastic
Weight: 7.8 oz.
2-1/4" UMA Mechanical (10-05565)
Case: Cast Aluminum
Weight: 4.7 oz.
Click here to download the 2-1/4" dual mounting diagram
Click here to download the 2-1/4" mounting diagram
Part number 10-05565 is specifically for Rotax engines. Part number 10-11250 is for lycoming/continental engines.