1987 3270 engine kill switch-gctid825085

[colbournee]

My Starboard kill switch suddenly kills both engines! In the cabin but not on the fly bridge. What's happening?

[Guest]

Sure sounds like a short somewhere...trace and check the wiring, clean the connectors with contact cleaner spray. Maybe some of the wiring is touching the port engine somewhere and insulation has been melted off or something? Check that the kill switches are wired correctly too. I'd assume that (like the EH-700's) the kill switches activate a solenoid that pulls a lever forward to shut the fuel flow off (on the EH-700's, it's on the port side of each engine). Look in the engine room and listen while someone pushes the starboard kill switch, and see if the solenoid on the port engine is activating when the starboard kill switch is pushed.

HTH,

Dave

[DesertFox]

I have noted in the past that some mechanics and electrical technicians take short cuts. Some of them connect both engines to a single kill switch, leaving the second kill switch as a "dummy".

Reading your message: "suddenly" refers to the fact they did work separately in the past, which obviously would discredit my theory though.

Tracing the wires from the kill switches would determine if they are separately connected or wired to the same kill switch...

Good Luck!

[SuperiorDiver]

if it is easy to disconnect the wires at the switches, I would and check each switch with a DMM for proper operation. That would discern a switch vs. wiring issue.

[Gsherwood]

You have kill switches? I have a 1987 3270 and I don't. Did you or a previous owner add them or were they factory?

[diveguy]

"Gsherwood" post=825311 wrote:
You have kill switches? I have a 1987 3270 and I don't. Did you or a previous owner add them or were they factory?

The hino's (diesel) would have kill switches as the gas engines would not if that is what you have.

[businessgetmoney]

Only the diesels have them? And they function by killing the fuel? That does not seem ideal

[Sportscar]

"businessgetmoney" post=825339 wrote:
Only the diesels have them? And they function by killing the fuel? That does not seem ideal

Why??? Basically that's the only way to stop a diesel since there is no ignition system to turn off like a gas engine. The only other way would be with a shutter to block the intake air. Easier to stop fuel.

[businessgetmoney]

Because running a diesel out of fuel often requires purging the fuel system. Maybe these diesels are different but at a repair shop I use to work at mechanics would have to tare down engines and spend hours to get them started again.

To be honest tho, i really have no clue how key off terminates a diesel engine so maybe its just on older or semi truck style engines.

[Sportscar]

"businessgetmoney" post=825390 wrote:
Because running a diesel out of fuel often requires purging the fuel system. Maybe these diesels are different but at a repair shop I use to work at mechanics would have to tare down engines and spend hours to get them started again.

To be honest tho, i really have no clue how key off terminates a diesel engine so maybe its just on older or semi truck style engines.

The shut off closes the fuel at the engine. No problem when it is started getting it restarted since your not emptying the whole fuel system. Just how would you suggest a diesel be turned off??

[Guest]

"businessgetmoney" post=825339 wrote:
Only the diesels have them? And they function by killing the fuel? That does not seem ideal

That's how pretty much all diesel kill switches work that I'm aware of. How else would you shut off a diesel? There's no spark to short, as there is with a gasoline engine...either shut off fuel or shut off air...seems like shutting off fuel is clearly the better choice. What's your ideal way to shut off a diesel?

Dave

[businessgetmoney]

You dont! No need to. Hahahaa...

What about killing voltage to injectors?

[Gsherwood]

Yes thanks, mine's gas.

[Opu]

Injectors are operated using pressurized fuel delivered by the fuel injection pump. The injectors do not use electricity.

[colbournee]

I have not had a chance to investigate my problem yet, it only came up the last trip out. I did restart the engines and they each shut down individually on the fly bridge with the kill switched up there.