scruzin said... Diesel engines are usually reliable but air leaks can be a real pain. They have an annoying habit of conking out just when you seem to need them the most, for example, if you've sucked in air after a bumpy passage. Every skipper really needs to know how to bleed their fuel system pronto, but it seems many don't

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Also, unless you're a cat with a spare engine, I reckon it's a very good idea to keep a sail up on the final approach to a marina, just in case you lose engine power. Then at at least you still have sail power.
Just something that may interest owners of boats with older diesel engines (and some newer ones) the manual lever on the diesel pump used for bleeding the diesel lines only works when the engine has relinquished its use of it. Meaning, if the manual pump is olso the one used by the engine by an internal leaver that is actuated by a cam, then when this cam has fully depressed the diaphragm in the pump, no amount of manual agitation of the external lever will pump any diesel. You will need to rotate the cam (meaning rotate the motor) by hand cranking or giving the starter motor a quick plug.
Maybe some of you have diesel engines that never stopped in this position but my old Yanmar does (only sometimes). I can tell as soon as I go to use the manual leaver by the feel (resistance) of the lever's action that the internal lever has already been depressed by the cam. This is something I'm glad I learned in port and not out at sea when time is usually running out.
Maybe everybody else knew this and I was last to find out
Oh to have a new diesel engine with self-priming diesel lines, but I suppose that would removed another one of the joys of life on the sea.