Diesel Engine Runaway - 2005 Cummins
Here is something I have never heard of in all my years of turning wrenches and fixing stuff. Got a call, (multiple texts actually) from a close cousin yesterday. They had just got back from a nice...
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Twomed wrote:
Marine, aviation, train engines, all have positive fuel shutoffs...auto/rv never required.
Your only option is what he did to stall it, which could cause damage, OR pinch fuel line closed with vise grips, OR crack a filter... if you can get to it safely.
He may get lucky.
If a engine is picking up "false fuel", from someplace else, or burning it's own lube for fuel, it does not matter how positive you shut off the normal fuel, it will keep running.
The 2-stroke Detroit Diesel, and old Cats had a butterfly that would cut off air when a cable was pulled. Pushing cable back in did not rest the butterfly.
My first time engine run-away was using military deuce and half air compressor to run a paint gun. The paint vapor was picked up, burned as fuel.
Another thing some diesels can do that can fill the owners pants. If you turn it backwards, or pull it down to a stall and clutch just as it stops, it will start and run backward.
