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a1huntingsupply

Registered: 08/11/08
Posts: 20
Reply with quote  #1 
Is there any chance I can hurt my E-TEC if I leave the ignition switch in the ON position with the motor OFF for extended periods? Everything on my boat (I-Command, GPS Receiver, LCX-27 unit etc..) is connected to the network and it's powered by the ignition switch. If I turn the ignition switch OFF I lose my GPS function on the the LCX-27 unit. If there is no harm leaving the ignition switch ON with the motor OFF I will leave it alone. If I can hurt the motor I will connect the network power to an accessory switch or some other way if needed. Any suggestions?

This was never a problem because I had a LMS-522 iGPS up front by the trolling motor and used the internal GPS on that unit when the motor was off. I am about to upgrade to HDS units and want to network them to the rest of the system and share the same GPS Receiver on the network. The way everything is currently wired I will have to leave the ignition key in the on position to keep the GPS receiver/network powered so I can share it with the HDS 10 & HDS 5 units.

Thanks!  
James

Spechaser

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Gold Level Member 3-2010 & 2013
Registered: 09/18/08
Posts: 2,297
Reply with quote  #2 
James,
   Thats an interesting question. I have no idea, but doubt it could cause damage. However, my concern would be the battery drain from the motor (EMM). Also to me seems like a pain. Meaning when you shut down and then turn the switch back on. Don't your electronics have to re-start or re-boot?
I prefer to have all accessories on switches to pick and choose. Just a thought.
   Steve
   Capt. KAT-5

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Spechaser
19'Custom Aluminum Center Console
2007 E-tec 150 Rebel 15 1/2 x 17 SST prop
Mod# E150DPLSUF
Ser# 05163481
Total wgt. 3250lbs,2 occupants, fuel,and gear.(aka the lead sled)
Marshlands of South Louisiana,USA



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arfadunger

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Registered: 07/06/09
Posts: 98
Reply with quote  #3 
I really don't know the answer, but I've always been told (I don't know why) that the ignition should be switched off when not running on all motors.

Another thing, and I don't know if it's true for Etecs, but my next door neighbour (who has Yamaha outboard) tells me that if he leaves his ignition on the motor counts that as running time, and his engine hours clock up.

jimh

Registered: 06/28/08
Posts: 2,734
Reply with quote  #4 
Using the ignition key in the RUN position to provide power for a lot of electrical loads that are going to be used when the motor is not operating does not seem like a good plan. I would avoid it. Power the NMEA-2000 network so that it can be energized without leaving the engine ignition in the RUN position.
Huey

Moderator
Registered: 04/20/08
Posts: 8,249
Reply with quote  #5 
Hi, as the guys have said, not ideal the way your system is wired, but no real damage will be done to the EMM, it will just have alot more "EMM on" hours than actual "engine run" hours in the history report.

Cheers,

Huey.
torew

Gold Level Member 3-2010
Registered: 06/02/08
Posts: 2,132
Reply with quote  #6 

Quote:
Originally Posted by arfadunger
I really don't know the answer, but I've always been told (I don't know why) that the ignition should be switched off when not running on all motors.

That's because a "normal" motor has one or more coils. If left powered on at all times the coil always draws current, and might burn up. The reason is that during normal operation the power to the coil is cycled (by the breakers) so it is not powered continously. An E-Tec does not have coils, so no harm done. Else, as the guys say, EMM hours run, motor hours do not.

The best is to use two separate power supplies to the NMEA 2000. Either with a power hub, or as I am going to install this winter, with two diodes, one from the GPS power switch and one from the motor harness. In that way the bus does not loose power when I switch off the motor, and the powers are separated and do not feed into each others.
indian036

Registered: 08/27/09
Posts: 66
Reply with quote  #7 
E-tecs don't have coils? How do they generate a spark?
Old (points type) ignitions may or may not have a current running through the coil while stopped, depending on whether the points are closed at the particular position the engine/distributor is in at the time. If closed, current flows. Not good.
Automotive electronic ignition depends on the kind. Some have current flowing when ignition on, but if memory serves, most don't.
I don't have any specific knowledge about e-tecs, but on principle, I'm not happy to have a petrol engine switched on for extended periods when not running. I agree with the others who have said that its best to power ancillaries separately from ignition switch, with some form of switch so its not a constant battery drain when not being used.
Many outboard motors' hour meters are just a clock which runs when the ignition is on, as the Yamaha person found. I haven't checked the situation with the traditional type hour meter on my e-tec powered boat, but the EMM info is what really counts anyway.
Bill

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2008 E-Tec 90 05246901
asautt

Gold Level Member 3-2010
Registered: 08/03/09
Posts: 69
Reply with quote  #8 
James
You didn't say how your electrical system is set up nor how many batteries you have. If you are running your accessories off a house battery and have a separate starting battery it makes sense to be able to power the network from your house battery. I am using the multi-engine power module (only have one engine). It works very well. I don't have to worry about all the electronics resetting or being damaged when I crank the engine.

If you are handy with electronics you could use a couple of diodes to wire in your secondary power input. You have to keep the inputs isolated so that the network power line is not able to bridge between the two batteries.

Alan

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Fishin' the Pacific NorthWest

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Lew

Registered: 09/23/09
Posts: 9
Reply with quote  #9 
My 25DTEL is wired directly to the battery. Is the EMM on continuously? Are the EMM hours racking up? The manual makes no mention and says "consult your dealer" before adding a switch.
Huey

Moderator
Registered: 04/20/08
Posts: 8,249
Reply with quote  #10 
Hi Lew, that is normal and on your electric tiller until the key is turned on the EMM is not on and therefore the EMM "on" hours is key on hours and run hours are as the name suggests.

Cheers,

Huey.
Lew

Registered: 09/23/09
Posts: 9
Reply with quote  #11 
That's just it Huey. I have NO switch or key, just a start button thats too close to the off button.
Huey

Moderator
Registered: 04/20/08
Posts: 8,249
Reply with quote  #12 
Hi Lew, you have a key switch on your tiller handle IF it is an electric start engine and that needs to be on for the EMM to be on.

Cheers,

Huey.
Lew

Registered: 09/23/09
Posts: 9
Reply with quote  #13 
Sorry Huey, No key switch on this U.S. 2010 model tiller.

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Huey

Moderator
Registered: 04/20/08
Posts: 8,249
Reply with quote  #14 
Hi Lew, so it is mate, I have not seen any 2010 models down under yet. If you have the engine battery leads going directly to the battery then i highly doubt the EMM would be on all the time, but only way to know for sure would be with a laptop plugged in. If you are close to your dealer swing by with it and see what it says and let us know.

Cheers,

Huey.
a1huntingsupply

Registered: 08/11/08
Posts: 20
Reply with quote  #15 
I guess I need to wire the network power to a separate switch (disconnect it from the ignition). If I do this I will be able to power the network and use the GPS on the network. I think I read somewhere that the I-Command gauges will go to sleep if you don't touch the buttons. If that is the case then it shouldn't drain the battery down as much. I have a 36 volt trolling motor but for the E-Tec and all the accessories I only have one battery. I will just have to try it out and keep a close eye on the battery voltage.


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