2 stroke emergency stops???

Pfft. Nobody would EVER pull the emergency stop, by mistake. That would be just TOO dumb. Wouldn't it, Browny?.....Browny? Ya there Browny??????

Any diesel will run away if the turbo seals let go enough to dump oil into the induction pipework.
Lots of youtube videos showing modern cars going off.
It's handy the GM's have a means to stop a runaway, whereas modern vehicles just rev until BANG.

Interested to read this thread.We have a 6V53 in our KM Bedford.Have had the truck for 30 years and I think it had a manual cable to a T bar between the seats but dont think it has ever been connected.In fact I have run a wire through the hole connected to the Last joint in the throttle so when my foot is flat on the floor and I need a few more horses I give the wire a pull which overtakes the play in the linkage.Sounds like I had better connect the emergency stop up again.What can cause them to run away. Ron

g'day Ronny .. my episode was caused by a worn governor that locked her on full throttle (so, technically it didn't run away) but the scary thing is you have no control (emergency flap not connected) and for an old S model Kenny that hadn't been run for around 13 years.......screaming at the top of her voice, with very loud exhausts..... runaway or flat out under no load will still be an ''unpleasant'' experience...... :'( :'( :'(....cheers mate

Ronny, a seized injector will do it as well. If the motor has been sitting for a long time it isn't uncommon for an injector to seize, they don't like being run out of fuel either.

The 92's and later 53's have spring loaded tangs that go into the injector foot so if one seizes it won't hold the rest of them open.

Injectors and turbo's.

Ah,
So maybe my personal theory about why I couldn't blow up my (once upon a time) 125 single cylender naturally aspirated carby 2 stroke Yamaha has some merit?

It was ultimatly limited by the capacity of the carby to deliver a charge and the maximum volumetric efficiency of the ports to handle it?

But, turbos and WFO injecters = BANG & TEARS?

bidstbc

-b

Hm-m-m-m,
I'm becomeing increasingly intrgued with this 2 stroke diesel/ screamer concept.

Noisy, smokey, oily, can run away, blow up spectacularily and end in fire ?

WOW ! !

I want one.

I've got this great idea . . .
and will definitly have some questions to ask at the Hills Run display grounds.

See ya there.

-b

P.S.
(I'm put in mind of the eary Kwaka 2 stroke triples, deadly to ride but lots of fun.)
LOL
-b

by the sound of all this there almost weapon of mass destruction I've a 6-71 in my old federal and when I put it in I saw this flap thing on the blower as I changed the air cleaner manifold and thought aw how important could that be never had a problem haven't started it for years now I might have to put that flap back on before I give it a go one day I had no idea about any of this revving problem can get the same sort of thing on a fordson tractor hole in a diaphram I think

Paul, probably pay to take the tappet cover off and check that the rack is moving freely, and maybe have an old truck mud flap or similar in readiness to pop over the air intake if iy hasn't been started for a while.

Well it happened to my old 653 in a Bedford after going up hill (one gear down), went over the top & went to select top gear......... Revs went to the top of the 'range' which made it impossible to select a gear to reduce revs.
It was caused by stripped spline on the blower shaft. Popped it out, reversed it & it got me 150km to Melbourne where I bought a new one.
Took me two hours to swap the shaft around in the middle of the night due to trying to find the friggin circlip I dropped...........

A 2 stroke engine can run in either direction**. I have heard of GMs starting the wrong way and becoming uncontrollable. Hence another need for the flap.

Using the flap will stop the engine, but may well destroy the internals in the process.

** who remembers those horrid little Lightburn cars from the 60s? They had a two stroke petrol; to go backwards you had to turn the motor off, then turn the key in the other direction to restart it..