I have a new 2004 H326. On the new Hunters there are now fire protection systems in the engine compartments. The engine fuel shut down is controlled electrically with a solenoid not the mechanical pull-cable as before. This engine Halon system has an electrical fail-safe link with the diesel. In case of an engine fire, as the Halon bottle depletes, the system solenoid will shut down the engine. My engine will, at some times, not respond to holding in the solenoid button in the cockpit and not shut-down. I have to go down in the engine compartment and manually hold the fuel valve lever to stop it. A real pain. Hunter and Yanmar reps. in the area have visited the boat several times, received factory tecnical bulletins, done diognostic checks, and not been able to fix the problem and are puzzeled. I was told by the Yanmar tech rep. most new engine system shut-down problems he has been aware of have been the reverse to mine. The diesel shuts down without warning or fire. That's not good. Do any of you have any insite to this problem. Andy K.
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Fuel valve lever?
Andy - Do you have to close the fuel valve on the tank? I have the push button shut off on my new 33 with the Yanmar 3YM30. Works OK so far with about 40 hours on the engine. Will yours shut down with the emergency button on the engine? If so, could it be as simple as an intermittent button/wiring problem to the panel?
Andy - Do you have to close the fuel valve on the tank? I have the push button shut off on my new 33 with the Yanmar 3YM30. Works OK so far with about 40 hours on the engine. Will yours shut down with the emergency button on the engine? If so, could it be as simple as an intermittent button/wiring problem to the panel?
It's a shame they had to mess.....
....with a proven fail safe system. The mechanical shut off cable ALWAYS works. Anyway, you need to find if voltage is being applied to the shut off solenoid at shut down. If yes, the solenoid is defective. If no, then you need to track back to the shut off button and do the same test.
....with a proven fail safe system. The mechanical shut off cable ALWAYS works. Anyway, you need to find if voltage is being applied to the shut off solenoid at shut down. If yes, the solenoid is defective. If no, then you need to track back to the shut off button and do the same test.
Intreasting wiring not fail safe
The key on my new H-36 is very loose and has rotated to the off position. When this happed the pushing the stop button did not work. As soon as I saw what happed I turn the key back to the on position And the button worked. There must be some kind of latching relay for this to happen.
The key on my new H-36 is very loose and has rotated to the off position. When this happed the pushing the stop button did not work. As soon as I saw what happed I turn the key back to the on position And the button worked. There must be some kind of latching relay for this to happen.
Electrical
Andy, Your problem may be linked to the electrical system. I had a simular experence on a diesel engine in a new lifeboat aboard ship. We couldn't get the engine to shut down, we tried everything. Finally someone noticed the battery switch had been accidently switched off. As soon as we turned the battery switch back on it shut down. Those solenoid's can be a real pain. Phil
Andy, Your problem may be linked to the electrical system. I had a simular experence on a diesel engine in a new lifeboat aboard ship. We couldn't get the engine to shut down, we tried everything. Finally someone noticed the battery switch had been accidently switched off. As soon as we turned the battery switch back on it shut down. Those solenoid's can be a real pain. Phil
Halon question
In reading this post, I am very surprised to read the word Halon. This is an inert, heavier-than-air gas, which snuffs out fire by DISPLACING the oxygen (air)from the site. It will flow downhill and pool in the lowest spot on your boat, similiar to propane. It is great stuff. It is ordorless, tasteless and, in concentration, deadly to humans. You can not breathe in a Halon-rich environment. Halon is also proved to deplete the ozone layer, but so does methane gas from cattle. The point is, you may not be able to replace the Halon tanks, as they will go the way of the old Freon refill bottles for your 80's type cars. I hope there is a warning system to alert you to the presence of Halon, as it could be worth your life when you go down to check out what went wrong with the engine after the bottle has gone off. I would, at the very minimum, strongly suggest installation of a gas detector, if Hunter did not install one as a safety precaution. Your life is worth more than $35.00-$50.00 +/-.
In reading this post, I am very surprised to read the word Halon. This is an inert, heavier-than-air gas, which snuffs out fire by DISPLACING the oxygen (air)from the site. It will flow downhill and pool in the lowest spot on your boat, similiar to propane. It is great stuff. It is ordorless, tasteless and, in concentration, deadly to humans. You can not breathe in a Halon-rich environment. Halon is also proved to deplete the ozone layer, but so does methane gas from cattle. The point is, you may not be able to replace the Halon tanks, as they will go the way of the old Freon refill bottles for your 80's type cars. I hope there is a warning system to alert you to the presence of Halon, as it could be worth your life when you go down to check out what went wrong with the engine after the bottle has gone off. I would, at the very minimum, strongly suggest installation of a gas detector, if Hunter did not install one as a safety precaution. Your life is worth more than $35.00-$50.00 +/-.
engine shut down
while all other have given good responses I would suggest that you keep the fire to the dealer/yanmart rep and make them fix this! what ever it takes if they can't figure it out tell them to start replacing things until they figure it out ! If it is not power related (key/battery switch) try replacing the solinoid,they do go bad on occasion,I would also suspect that the fire suppresion system may have a issue here and need to be checked.However this is all the dealer/yanmar problem and keep after them until they fix it!
while all other have given good responses I would suggest that you keep the fire to the dealer/yanmart rep and make them fix this! what ever it takes if they can't figure it out tell them to start replacing things until they figure it out ! If it is not power related (key/battery switch) try replacing the solinoid,they do go bad on occasion,I would also suspect that the fire suppresion system may have a issue here and need to be checked.However this is all the dealer/yanmar problem and keep after them until they fix it!
shut off
The problem you're having is most likely the result of the fact that the soleniod on that engine was not mated in line with the shut off lever on the injection pump. Instead it works via a cable that wraps around the back of the engine. It is this bend in the cable that introduces enough friction such that the solenoid isn't srong enought to actuate the shut off lever. Possible fixes: 1)move the solenoid so that it is more in line with the cable pull direction or 2)use a stronger solenoid or 3) try larger guage wire to the solenoid.
The problem you're having is most likely the result of the fact that the soleniod on that engine was not mated in line with the shut off lever on the injection pump. Instead it works via a cable that wraps around the back of the engine. It is this bend in the cable that introduces enough friction such that the solenoid isn't srong enought to actuate the shut off lever. Possible fixes: 1)move the solenoid so that it is more in line with the cable pull direction or 2)use a stronger solenoid or 3) try larger guage wire to the solenoid.
Is shutoff button powered by the key?
Bear in mind my engine has the old mechanical shut off, not the electrical one, so take what I say with a grain of salt. From Doug's experience in having to turn the key back on and Phil's experience with the lifeboat, it sounds to me like the shutoff button gets its power to actuate the solenoid straight from the key switch. I would suggest that running power directly to the shutoff button (through its own fuse, of course) would eliminate the potential for not being able to shut down the engine if the key becomes turned off. This wouldn't eliminate Phil's problem where the battery switch was turned off, but it would assure that you could always activate the shutoff solenoid.
Bear in mind my engine has the old mechanical shut off, not the electrical one, so take what I say with a grain of salt. From Doug's experience in having to turn the key back on and Phil's experience with the lifeboat, it sounds to me like the shutoff button gets its power to actuate the solenoid straight from the key switch. I would suggest that running power directly to the shutoff button (through its own fuse, of course) would eliminate the potential for not being able to shut down the engine if the key becomes turned off. This wouldn't eliminate Phil's problem where the battery switch was turned off, but it would assure that you could always activate the shutoff solenoid.
Have had the problem with a 2004 36 model
My 36 model had a problem with not shutting down when the electrical switch was pushed. We traced the problem down to the electrical activated sol at the back of the engine. It would get power but not respond. The only way to kill the engine was to operate the other end of the cable attached to the sol. After taking the cables off of the sol we were able to operate the sol with power. The fix has been to tighten the nuts on the electrical connections to the sol and add internal star lock washers to the connection. We have had no problems with it since. Also added some locktite as there is a lot of vibrations involved here.
My 36 model had a problem with not shutting down when the electrical switch was pushed. We traced the problem down to the electrical activated sol at the back of the engine. It would get power but not respond. The only way to kill the engine was to operate the other end of the cable attached to the sol. After taking the cables off of the sol we were able to operate the sol with power. The fix has been to tighten the nuts on the electrical connections to the sol and add internal star lock washers to the connection. We have had no problems with it since. Also added some locktite as there is a lot of vibrations involved here.
To Captn Dare
After reviewing the responses to my post,"Diesel Wont Shut-down", yours is certainly something I am checking out. I have reviewed your response with my Hunter dealer and his warrantee manager is checking with Hunter tech. support now. Thank you for your insite. Your suggested fixes seem to show you have experience with that diesel and the location/position of the solenoid. If you don't mind me asking... What is your background? Thanks again, Andy K.
After reviewing the responses to my post,"Diesel Wont Shut-down", yours is certainly something I am checking out. I have reviewed your response with my Hunter dealer and his warrantee manager is checking with Hunter tech. support now. Thank you for your insite. Your suggested fixes seem to show you have experience with that diesel and the location/position of the solenoid. If you don't mind me asking... What is your background? Thanks again, Andy K.
Andy, a question...
What is the brand of the fire containment system. I've not seen these here and would like to research it more. Pat McCartin Inland Marine Diesel Buford, GA
What is the brand of the fire containment system. I've not seen these here and would like to research it more. Pat McCartin Inland Marine Diesel Buford, GA
I am the one who found the problem
When you turn on the engine, you should see a green light on the fire suppression system. If you see a red light, immediately shut the engine off or in 30 seconds the stop solenoid switch on the back of the engine that pulls the compression lever will burn up. This is caused due to leakage in the fire extinquisher sending a false signal to shut the engine down. You can overide by flipping the switch. If you remove the fire extinquisher, You will notice unplugging a wire connector. If you want to, you can also put a wire between the two ends which will overide any false signal. Hunter is very aware and most of you have recieved notices.
When you turn on the engine, you should see a green light on the fire suppression system. If you see a red light, immediately shut the engine off or in 30 seconds the stop solenoid switch on the back of the engine that pulls the compression lever will burn up. This is caused due to leakage in the fire extinquisher sending a false signal to shut the engine down. You can overide by flipping the switch. If you remove the fire extinquisher, You will notice unplugging a wire connector. If you want to, you can also put a wire between the two ends which will overide any false signal. Hunter is very aware and most of you have recieved notices.
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