a vote for simplicity
John Ehricht's orginal post disclosed that for his new Hunter 36 the pushbutton shutdown does not displace the manual shutdown which he uses when the electric shutdown fails. So much for the superior dependability of electro-mechanical devices over mechanical devices Here is a link to cable maintenance, a simple and easily understood procedure.http://shop.torresen.com/marine_diesel_direct/Yanmar/index.php?p=include&contentname=stop_cable&contentsection=yanmar&pagetitle=Stop+Cables+For+Yanmar+Marine+Engines Fred Ficarra, your shutoff solenoid operation you evidently are recommending may work for you. I'm just not sure you should be touting it for replication. It reminds me of the wonderful Rube Goldberg contrivances I used to pore over and admire as a boy. In your shutoff sequence, an off key position energizes a timer which energizes a relay which energizes a solenoid which cuts off the fuel which stops the engine. Then when the timer turns off, (after the engine has ceased rotating hopefully) the relay turns off and the solenoid turns off and the fuel is available again at the injection pump. If the timer malfunctions, it doesn't shut down. If the relay malfunctions, it doesn't shut down. If the engine doesn't stop rotating before the timer expires, it fires right back up probably to the great consternation of the operator. Not a good model either for dependability or even safety, both primary considerations for a marine auxiliary engine.