A: Hi Rob,
Your mechanic is correct. Cessna routed the prop control cable on the 1978 and 1979 R and TR 182s under the cylinders on the left side of the engine before securing the outer housing to the forward side of the cylinder baffle on number-two cylinder.
That baffle has a tendency to crack. If the cracks progress, the possibility exists for the housing to become unanchored. When that happens, the housing will drop down due to its weight—and the prop control cable attached to governor arm that controls engine rpm will also drop down.
These changes to the housing and prop control cable cause the engine rpm to change dramatically and the engine will immediately slow way down. This will immediately drive up the manifold pressure and scare the bejesus out of you and your passengers.
Cessna service kit SK182-75A is available for around $2,500 to change the routing of the prop control cable so it runs above the cylinders. A search of the internet shows that Air Power, Inc., Broadie’s Aircraft Parts and Yingling Aviation all stock this service kit.
The revised routing increases the smoothness of prop rpm control and extends the life of the cable. The prop governor has to be reconfigured to accommodate the cable rerouting.
Know your FAR/AIM and check with your mechanic before starting any work.
Steve Ells has been an A&P/IA for 43 years and is a commercial pilot with instrument and multi-engine ratings. Ells also loves utility and bush-style airplanes and operations. He’s a former tech rep and editor for Cessna Pilots Association and served as associate editor for AOPA Pilot until 2008. Ells is the owner of Ells Aviation (EllsAviation.com) and lives in Templeton, Calif. with his wife Audrey. Send questions and comments to .