RV-12iS Throttle Cable

[fehdxl]

We had the throttle cable wear to the point the throttle body spring couldn’t overcome the friction and allow the engine to go to full throttle; thankfully on the ground and not during a go-around. Interesting the MM describes a procedure to lube the cable but the initial, build instructions do not. Guess by that point certain things are assumed.

Anyway, just wanted to point out there’s a lube procedure and also a timing test to make sure it moves forward w the friction knob loose in a certain period of time.

Fly Safe!

Jim

[Piper J3]

On J-3 Cub I owned…. vibration caused the spiral wind of the carb heat cable jacket to wear a like pattern on the solid push-pull inner wire to the point where the cable finally locked-up...

[rvbuilder2002]

Originally Posted by Piper J3

On J-3 Cub I owned…. vibration caused the spiral wind of the carb heat cable jacket to wear a like pattern on the solid push-pull inner wire to the point where the cable finally locked-up...

I'm pretty sure the cables used on the RV-12 have a teflon inner liner so there is never any contact between the cable housing and the inner wire.

[fehdxl]

Just to follow up, replaced the cable and lubed with LPS2 before installation. All works well now.

Here’s the throttle cable lubing info from the maintenance manual.

Fly safe!

-Jim