If your engine idle becomes unstable after changing the nitro percentage of your fuel, try the Redline R3. The Japanese made R3 is especially designed for airplane and helicopter engines. It provides great performance in the entire operational range, from stable idling to smooth acceleration. The R3 is a medium length, idle bar-less glow plug featuring a platinum alloy filament. This glow plug has been widely accepted by serious aircraft and helicopter modelers. If you are accustomed to glow plugs such as the O.S.#8 and the Enya#3, you will like the Redline R3.

If you remove the glow starter from your idling engine and notice an immediate drop in PRM, you may need either a hotter glow plug or need a higher nitro percentage fuel. The Japanese made Redline R1 is developed for high-speed low-nitro boat,airplane, and helicopter engines. Why not to try Redline R1 glow plug first before going to use a higher nitro percentage fuel? Due to its long-reach thread design (7/32" / 5.55mm), we do not suggest using the R1 in small-size enignes(.15 or less).

Requires: 8mm wrench or 4 way wrench After running for a while, the element might become dark brown. It is carbon around the surface of the glow plug element and may cause the engine hard to start and running rough. Replace or try another colder or hotter type glowplug as necessary. The following symptoms may be caused by improper choosing of glow plug type. Too cold: Poor throttle response at bottom end, unsustainable idle, and a slow engine acceleration and the engine gets too cool at idle. Too hot: After running the engine at the highest speed for a while, engine hesitates to slow down to a stable idle when abruptly close the throttle to the lowest, the glow plug is burnt very easy and engine temperatures is high.