How does engine stop

[PeteCooper]

A few years ago I knew somebody who had a Mirror Offshore - which I think had a Volvo MD1 - the way to stop that involved a heavy duty gardening glove and grabbing the flywheel!

 

[pmagowan]

My stop solenoid recently gave up the ghost so now I have to lift the hatch and move the lever.

 

[prv]

However, some older engines were designed to be stopped that way

I always assumed that to be the case, due to the number of old men who are convinced that the T-handle in their cockpit operates a decompression lever

Pete

 

[maxi77]

Not on my bike (and also some mates' bikes).

Certainly earthing the magneto was the normal way of stopping magneto ignition petrol engines, acts just like switching the ignition off on a coil ignition car, no spark no go.

 

[AntarcticPilot]

I always assumed that to be the case, due to the number of old men who are convinced that the T-handle in their cockpit operates a decompression lever

Pete

Actually, I was convinced of that because of my prior experience, until I learnt more about "modern" diesels! And I'm not all THAT old

 

[prv]

I always assumed that to be the case, due to the number of old men who are convinced that the T-handle in their cockpit operates a decompression lever

Actually, I was convinced of that because of my prior experience, until I learnt more about "modern" diesels!

That's what I mean. People (principally my dad) talking about "pulling the decompressor" to stop, or "make sure the decompressor is in" when the engine spins but won't start. I know it's not a decompressor, but I assumed it would once have been.

Pete

 

[gordmac]

Yes Ford 4D,6D as in Fordson Major tractors,Parsons Pike marine units etc,had a throttle in the air inlet which was controlled by the driver's foot. Thence vacuum tubes,one from upstream,and one from downstream of the throttle butterfly led to a diaphragm connected to the fuel rack on the Sims injector pump,and the difference between atmospheric pressure and the inlet manifold depression moved the rack.
I have driven the tractor version, and I had one in a boat, and it works fine! But I would like to know just why they did it that way??

Interesting, on the face of it I can't see any advantage to doing that, can anyone?
The D6 engines on my boat are pump controlled as normal.

 

[Amulet]

Diesel engines aren't throttled.

Ah! yes... apologies. I must admit we do say "throttle" on my boat...
Wikipedia:
"The term throttle has come to refer, informally and incorrectly, to any mechanism by which the power or speed of an engine is regulated."