Monitor your engine's wear...periodic compression readings will catch problems before they turn into breakdowns. Simply screw the heavy-duty brass shaft into the glow plug socket and crank the engine. Readings are shown in pounds per square inch (PSI) and KiloPascals (kPa) on the steel-housed face. Gauge Adapter required for gasoline engines.

The Hyper Cooling Head and 60L Carburetor on the Hyper 50 SH is a perfect match for any 50 class helicopter A revolutionary head design offers improved combustion efficiency for stable hovering and aerobatic flight A Large 0.39 inch (10mm) diameter carburetor intake makes for greater running stability. Besides good looks and excellent cooling the .50 SX-H Ringed Hyper engine's machined blue aluminum heat sink head boosts combustion efficiency for more power and smoother operation.

This powerful YS .91 Helicopter engine has been optimized to provide the ultimate power with maximum efficiency and reliability. The YS .91 includes a larger bore cylinder design for superior operation thus reducing cut outs improved carburetor design for ease of adjustment factory preset fuel regulator and best of all it is the same physical size as the 80ST making it easy to install. This engine is so powerful we recommend using a gear ratio of 1-7.5 to 1-8.0. Instructions included in kit.

The solution to those hard to reach glow plugs. Outstanding universal glow plug wrench for removal or installation. Rigid CNC aluminum construction, with one way bearing, and will virtually last forever. This essential tool comes with long and short adapters. Slip the adapter on one end to loosen the glow plug. Slip it on the other end to tighten. Especially useful for Shuttle, Ergo, TSK, Raptor, Hawk, and Falcon. Available in blue or purple.