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Old 03-29-2012, 09:06 PM   #1
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Engine won't shut down

Started the engine for the first time this season and it wouldn't shut down when I pushed the stop buttons. What do I need to look at.
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Old 03-29-2012, 09:12 PM   #2
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That's gonna be a real stretch without at least a bit of information - like at a bare minimum the engine(s) in question.
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Old 03-29-2012, 09:24 PM   #3
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120 ford lehman, 1983
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Old 03-29-2012, 09:27 PM   #4
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Need more information, but if it is diesel, you should have a shutdown solenoid somewhere around the pump. When you push the button you activate the solenoid which pulls a lever on the injection pump that shut the fuel off and stops the engine. You can usually pull the lever manually to stop the engine, until you figure out why it's not activating when you push the button.
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Old 03-29-2012, 09:27 PM   #5
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Is the stop button an electrical operation? Could be bad contacts in the switch or connections to the solenoid.
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Old 03-29-2012, 09:51 PM   #6
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there are two stop buttons and neither one works. I'll check the "shutdown solenoid" connections. I didn't know there was a manual shut off. thanks guys.
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Old 03-29-2012, 10:05 PM   #7
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there are two stop buttons and neither one works. I'll check the "shutdown solenoid" connections. I didn't know there was a manual shut off. thanks guys.
You can operate it by hand...it's right on the injector pump.
But the electric solenoid should operate it too. Just jump right at the solenoid to see if it is operating....then you can bactrack to the buttons.
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Old 03-29-2012, 10:56 PM   #8
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Had the same problem last year on same engine. Turned out to be a rusted contact on the solenoid. Cut the wire and put a new terminal and it has been working flawlessly ever since.
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Old 03-30-2012, 02:56 AM   #9
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I had the same problem last year on the ford 120. the solenoid was working just fine but the little set screw that holds on to the ss wire from the solenoid was loose and the wire slid through instead of pulling the fuel shut off lever.
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Old 03-30-2012, 07:01 AM   #10
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sounds like a simple fix. i like that. thanks
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Old 03-31-2012, 05:54 PM   #11
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sounds like a simple fix. i like that. thanks

Instead of a simple fix , how about a simple upgrade?

Cable , is simple and doesnt die each winter.

The loads to STOP are very low so a bronze choke cable will do,
or an outboard style cable is even more robust if the run is long.

When you switch over to Murphy Gauges . the auto secure feature will be a snap to install.

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Old 03-31-2012, 06:19 PM   #12
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Thats what it was. A loose corroded conection . This is my first diesel powered boat, and one lesson learned.
A friend of mine has a old Dodge diesel with the cable shut down. He also said I should switch it over to cable. Not sure if I could do it from the fly bridge, but I might do it as a backup

Thanks
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Old 03-31-2012, 06:47 PM   #13
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Both my Perkins have cable shutdowns from the bridge.
Works fine
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Old 04-01-2012, 08:48 AM   #14
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I think you'll find the electrical shut down to be pretty reliable as long as the connections are in good shape so I wouldn't go to a lot of trouble to run a manual cable to the helm.

You could use a cable and just mount it in the engine room somewhere for emergencies. Make sure it doesn't interfere with the electrical shut down
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Old 04-01-2012, 08:51 AM   #15
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Started the engine for the first time this season and it wouldn't shut down when I pushed the stop buttons. What do I need to look at.
I'm assuming you eventually got it shut down without running the tanks dry so how did you do it?

I haven't found my solenoid or lever so my plan is to block the air intake if I have to. It's not safe to be fooling around on that side of my engine with it running.
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Old 04-02-2012, 09:21 PM   #16
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I pulled the air filter off and blocked the intake. And i had to be careful.
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Old 04-03-2012, 12:04 AM   #17
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I pulled the air filter off and blocked the intake. And i had to be careful.
That's good thinking but unnecessary. Get someone to show you where the shutdown is and try using it manually from the engine room. If you've got your button working again you can figure out yourself where the shutdown solenoid is and from there figure out how to do it manually. It isn't rocket surgery.

And rigging a manual shutdown cable is totally unnecessary. This is a very simple system with a very small number of failure points. Just learn how it works.
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Old 04-03-2012, 12:38 AM   #18
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My first thought would be to shut off the fuel (close valve "To: Engine").

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Old 04-03-2012, 11:52 AM   #19
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My first thought would be to shut off the fuel (close valve "To: Engine").
Wouldn't that mean bleeding the fuel line when you want to start the engine again? Sounds like a royal PITA.
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Old 04-03-2012, 01:38 PM   #20
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Wouldn't that mean bleeding the fuel line when you want to start the engine again? Sounds like a royal PITA.
The turn of a couple of valves allows the fuel-polishing pump to prime the engine.

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