My 1990 Barth Regency pusher has a problem with the throttle sticking. I have traced the cable from the engine to a round what looks like air valve. If I rev the engine using the throttle the rpms fall slowly. If I rev the engine by hand at the linkage it operates normally. I have tried to lube the cable at the engine, but to no avail. I am a new owner of this unit and don;t have a clue. Its my first pusher so I'm in the dark. Makes it a little hairy to drive in traffic. Please help a poor and I mean poor, Barth owner out. Thanks for the timely response.

ttt, for someone that knows diesels.

Clancy,

Sounds like you have an air throttle. This is common on diesels as the engine is a long, long way from the foot pedal. The important question is What is wrong with it?

The foot pedal should regulate air pressure back to that device that, in turn, pulls and releases the cable to the engine fuel regulator in proportion to your foot control up front.

You might consider looking at the individual pieces of the system to see if the failure is obvious. a)is the cable connected to the engine fuel regulator?, b) is the cable free moving between the engine and air regulator?, c) does the air regulator move when foot pedal is depressed?, d) does foot pedal seem to be regulating an air flow? (should hear air exhausting I think).

These are my best guess, others here may be able to speak of your Regency with detail.