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TOPIC: 1987 3270 engine kill switch

1987 3270 engine kill switch 18 Sep 2017 21:00 #1

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

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1987 3270 135-Hino
Foxtrap, Newfoundland
Last Edit: by colbournee.

1987 3270 engine kill switch 19 Sep 2017 05:35 #2

  • davesisk
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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

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Last Edit: by davesisk.

1987 3270 engine kill switch 19 Sep 2017 07:20 #3

  • DesertFox
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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!

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1987 3270 engine kill switch 19 Sep 2017 11:39 #4

  • SuperiorDiver
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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.

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1987 3270 engine kill switch 20 Sep 2017 16:40 #5

  • Gsherwood
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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?

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Glen Sherwood
1987 3270
Coupeville, WA

1987 3270 engine kill switch 20 Sep 2017 19:54 #6

  • diveguy
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Gsherwood 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.

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"Martini's Law"
1986 Bayliner 3270, 110 Hino's
Nova Scotia, Canada

1987 3270 engine kill switch 20 Sep 2017 20:53 #7

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

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1987 3270 engine kill switch 20 Sep 2017 22:56 #8

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businessgetmoney 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.

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Last Edit: by Sportscar.

1987 3270 engine kill switch 21 Sep 2017 12:07 #9

  • businessgetmoney
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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.

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1987 3270 engine kill switch 21 Sep 2017 14:17 #10

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businessgetmoney 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??

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1987 3270 engine kill switch 21 Sep 2017 14:30 #11

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businessgetmoney 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

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1987 3270 engine kill switch 21 Sep 2017 15:24 #12

  • businessgetmoney
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You dont! No need to. Hahahaa...


What about killing voltage to injectors?

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Last Edit: by businessgetmoney.

1987 3270 engine kill switch 21 Sep 2017 20:47 #13

  • Gsherwood
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Yes thanks, mine's gas.

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Glen Sherwood
1987 3270
Coupeville, WA

1987 3270 engine kill switch 22 Sep 2017 02:12 #14

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

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Dick
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Oceanside
1987 3218 w/ 150 Hinos

1987 3270 engine kill switch 22 Sep 2017 11:29 #15

  • colbournee
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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.

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1987 3270 135-Hino
Foxtrap, Newfoundland
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