How do you turn off your engine?

Bouba

Bouba

Well-Known Member
Joined
6 Sep 2016
Messages
48,193
Location
SoF
Visit site
I heard something today and I’m not sure if I got the wrong end of the stick. To turn off the engine, turn the key clockways to start. Well I tried it and it worked. No graunching of startermoter shaving teeth.
But is this normal? Applicable to only certain engines?
 
On my outboard its clockwise to start, anti clockwise to turn off.
I occasionally pull the kill cord to test it still works ok instead of using the key,
 
jfm said:
Doesn't sound normal and I wouldn't do it. I just press the stop button.
Click to expand...

I was told by a MAN engineer not to stop the engines on the stop button but on the key. Apparently, the Stop buttons are for emergency stop situations only and cut all fuel and power to the engines instantly. Dont ask me why that isnt good for them
 
I would never try it .
Aside if it did work ( doubt it ) how would you get your keys out ?
You have to turn them to the L to re centre to remove the keys .
I don’t think you can accidentally or deliberately remove a key while it’s in the R running mode .For example if one of the two emergency stop buttons have been activated .
There’s one in the ER and one on the helm for each engine ,

I never intend use the emergency stop buttons .But don’t ask how I know they work :)

Last thing you wanna end up doing is chip a tooth or a few teeth off the flywheel.
Of the two the S motor gear and fly wheel I wonder which will wear / chip first ?? It not something I have thought about .

The only way it ( turning the key to the R ) would work is if there’s an interlock preventing the solenoid activation when the engines running , ie you don’t get the graunching of gear noise ? And obviously the identical fuel cut off method to kill them like turning to the L .

Not something I,am gonna try as it does not solve having to re centre the thing to remove the key
 
Last edited:
After you turn clockwise (to the start) and the engine stops, you just do the normal and turn anti clockwise and remove the key
 
Deleted User said:
I was told by a MAN engineer not to stop the engines on the stop button but on the key. Apparently, the Stop buttons are for emergency stop situations only and cut all fuel and power to the engines instantly. Dont ask me why that isnt good for them
Click to expand...
I believe that this has more to see with the Ferretti installation rather than MAN engines per se, M.
In fact, I recall to have heard from Andrea that your red stop buttons are meant as emergency stops, and are somehow connected to the fire suppression system. They don't go as far as activating also the fire estinguisher, they do cut fuel supply and (IIRC) after using them there's something that needs to be re-engaged in the e/r.

In my MAN (but all mechanical as you know, not CR) installation, the only way to turn off the engines is by turning CCW the key to the center position first (tripping the alarms and turning the warning lights on, but NOT stopping the engine), and then further CCW temporarily, for just a second.
The key then returns to the center position and can be removed.
All fire-related controls (fuel cut-off, e/r vents shutting and manual estinguisher activation) are in one of the cockpit cheeks.
 
MapisM said:
I believe that this has more to see with the Ferretti installation rather than MAN engines per se, M.
In fact, I recall to have heard from Andrea that your red stop buttons are meant as emergency stops, and are somehow connected to the fire suppression system. They don't go as far as activating also the fire estinguisher, they do cut fuel supply and (IIRC) after using them there's something that needs to be re-engaged in the e/r.
Click to expand...
Not sure thats correct. For the first couple of years I owned the boat, I always stopped the engines using the stop buttons and I dont ever remember finding the engine bay full of fire suppressant! It was when I came to France and got talking to the very competent MAN technician here that he told me to use the keys rather the stop buttons to stop the engines. There is a separate and well covered pull switch for the engine bay fire extinguishers
 
jordanbasset said:
I can't remember being on a sailing yacht with a key to start the engine, it is always an on off button with an additional stop start button. Is it because of the size of the engine or worries about theft that requires a key?
Click to expand...

Plenty of older engines have a key to turn on the oil, temp and charge lights, either turn the key further to start, or push a separate button. Stop can be a button for a solenoid or a bowden cable to pull, cutting off the fuel.

If you've got anythig else, RTFM.
 
Deleted User said:
Not sure thats correct. For the first couple of years I owned the boat, I always stopped the engines using the stop buttons and I dont ever remember finding the engine bay full of fire suppressant! It was when I came to France and got talking to the very competent MAN technician here that he told me to use the keys rather the stop buttons to stop the engines. There is a separate and well covered pull switch for the engine bay fire extinguishers
Click to expand...
Agreed - in fact what I said in post #13 is that those buttons are somehow linked to the fire control system, except that they do NOT activate also the fire estinguisher.
Coming to think of it, I also remember why and when A mentioned that to me, i.e. when he spotted that soot on the e/r ceiling, near the exhaust of the internal bank of port engine.
He asked me to turn the engine on/off while he checked any air movement around the exhaust with a piece of paper, to find out where the soot was coming from. And when I turned the engine off with that button, he explained me that it wasn't the right way to do it.

Otoh, I'm not positive about what I said previously ref. needing to re-engage the fuel flow inside the e/r after such emergency shutdown.
If you say that you always turned the engines off that way, obviously what I thought is not applicable - or maybe fuel supply is automatically re-opened after a successful shutdown, I'm not sure.

Regardless, I still believe that such design was from Ferretti, rather than MAN.
In fact, as you might remember, the 53 with Cat engines was similarly arranged - at least, that's true of all the ones I saw...
 
Coming to think of it, I also remember why and when A mentioned that to me, i.e. when he spotted that soot on the e/r ceiling, near the exhaust of the internal bank of port engine.
He asked me to turn the engine on/off while he checked any air movement around the exhaust with a piece of paper, to find out where the soot was coming from. And when I turned the engine off with that button, he explained me that it wasn't the right way to do it.
Click to expand...

I didnt realise you were involved with diagnosing that. Thanks very much!

Regardless, I still believe that such design was from Ferretti, rather than MAN.
In fact, as you might remember, the 53 with Cat engines was similarly arranged - at least, that's true of all the ones I saw...
Click to expand...
Could be. The button arrangement has been present on all of my 3 Ferrettis. I must admit that until I owned the 630 I always used the stop buttons to shut down the engines but I've never noticed any ill effects
 
You must log in or register to reply here.

Other threads that may be of interest

Z
Engine Problems.....
2
Replies
22
Views
700
billcole
B
steved
Batteries......what would you do
Replies
3
Views
245
Refueler
Refueler
lustyd
St60 wind transducer removal
Replies
12
Views
196
KompetentKrew
KompetentKrew

Share this page

Top