my engines wont turn off

[chriswilliams29]

have you ever had this .
my windy 30ft twin volvos diesels has a strange problem it started with one engine not turning off on the ignition key . then on sunday when i switched off the engins neither of the engines would stop.
i tried switching on and off but they wouldnt stop ,then for no reason they stopped .
the first time it happened it pulled the wire of the fuel solenoid and the engine still did not stop? i have only had the boat in the water a couple weeks and the only major electrics i have had done is a new anchor windlass fitted.
your thoughts please. engine installation is 12 yaers old

 

[Guest]

Engine could be running on engine oil?? Very bad if this is the case, fingers crossed for a less expensive solution.

Regards,

Peter
http://www.mistressofmourne.com

 

[martinb]

I have just had the same problem on my car (Rover turbo diesel).
The solenoid seemed to be working OK but when I stripped it down I discovered that the rubber seal on the end of the solenoid plunger was split allowing fuel past.
Needles to say I could not buy the plunger and rubber seal, but had to buy a complete new solenoid at £60.

Regards,

Martin

 

[scottie]

which engines do you have
are there stop levers on the fuel pumps ?

 

[mtb]

Re: If this happened it would run untill bang ! nm

..

http://homepage.ntlworld.com/boats
I want a big steel ex trawler / tug v / cheap or swap for tug

 

[mtb]

Re:sticking solenoids or

Sticking solenoids / wirering fault allowing power to stay with the solenoid.
Mick

http://homepage.ntlworld.com/boats
I want a big steel ex trawler / tug v / cheap or swap for tug

 

[chriswilliams29]

no my engines have no stop levers

 

[Trevethan]

Maybe you should call in a priest? This sounds like demonic engine posession to me.

Having said that, my wife had a car that did the same thing, she called it Chuckie. it turned out it the seal in the solenoid had split too.

 

[oldharry]

From your decsription, definitely either a wiring fault or an internal problem with the fuel cut off solenoids. The fact that both engines are doing it suggests that the fuel may be contaminated to some degree causing the cut offs not to close properly.

Change the cut off switches (at a price!) and change the fuel filters. Also check out the wiring. As long as the stop contorl on the pump has 12 volts on it, the engines will continue to run. So a faulty ignition switch, or a short circuit in the wiring would cause them to run on. However you say they still ran with the wiring disconnected. If so, the problem is the actual stop solenoids themselves, which may be worn, damaged or be contaminated preventing the from closing. If it happens again, try tapping them (not too hard!) with a spanner to jolt them shut.

A diesel will run on engine oil but sounds very rough and ragged and produces a huge volume of white or blue white smoke when it is doing it. It is usually caused by blow by, when the pistons rings and bores are worn either allowing oil into the combustion chamber - in which case there is no stopping it, or high crank case pressure blowing oil through the engine breather. This is usually connected to the air intake and so inhjects the oil back into the engine. In this case the engine will stop after revving roughly for ten or fifteen (quite scary!) seconds after switching off, and again producing a huge volume of smoke. If the crank breather goes to the inlet manifold look for engine oil there.

The remedy? New rings and usually a rebore. Funnily enough I'm just starting today on a Perkins with that problem. I expect to find the cylinders/rings are well worn though the owner says they cannot be as the engine was supposed to be a 'good one' when he bought it.

 

[coliholic]

I know this might sound stupid, but are you sure you're actually turning them off correctly?

On my twin Volvo diesels, when turning off, you don't turn the key fully anti clockwise all at once. You turn the key just one click back, wait for the engine to stop (energising the stop solenoid in that position) and then turn it the second click back to the Off position. If I turn it fully anti clockwise all in one go, I can remove the key but the engines will stay running. So make sure you're not beating the system and going past the "solenoid off" position too quickly. And it's important that you do indeed go back that next click to Off position when the engines have stopped, otherewise the solenoids are permanently energised and apparantly that'll cause them to burn out.

Failing that, I'd guess at the stop solenoid being faulty and check that first.

 

[oldharry]

Trust Volvo to do make it more complicated!

 

[aztec]

1) remove solenoid, don't drop the spring and plunger.
2) wire it up to a battery, -ve to the body, +ve to the connection.
3) if it clicks and pulls the plunger in, it's ok.
4) if it don't it's buggered.
5) take the offending thing/s to Lucas service, for replacement.
6) check that it's not rusty in side, shouldn't be - but possible.
7) refit and go boating.



interested in stuff that needs mendin'

http://homepage.ntlworld.com/s.amos/index.html

 

[mtb]

Re:they all say that

But expect you to the magician who can fix it for nout !!

I used to walk the other way as soon as a potential customer would say well its not much is it, the bloke I brought it from had no problems !!
Or
It ran perfectly until it stopped

All inferring that you cant charge them what it should cost to put right.
Mick

http://homepage.ntlworld.com/boats
I want a big steel ex trawler / tug v / cheap or swap for tug

 

[Eudorajab]

Where are you now then ??? How far have you got ???? How much diesal do you have left ??

Sounds like solenoid to me !!