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#11739164 - 07/24/16 09:18 AM Perko question
steve_twice Offline

Registered: 08/28/03
Posts: 334
Loc: Flower Mound, TX
My boat has a single (ON/OFF) Perko that controls the cranking battery. Probably a dumb question but do I need to turn it off between trips? It seems like if there's nothing pulling power from the battery it wouldn't make any difference?

I was an English major. Please be kind ...



Edited by steve_twice (07/24/16 10:00 AM)

#11739177 - 07/24/16 09:26 AM Re: Perko question [Re: steve_twice]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1664
Loc: Euless
I do on mine. If I don't the battery will go down in 3-4 days even though the main switch on the dash is off. Only thing I can figure is somehow the engine control module is still powered even though the ignition is off and maybe this is drawing current. I could check this with my multi meter if I wasn't so lazy. For now I just flip the Perko master and it's all dead.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!

#11739269 - 07/24/16 10:19 AM Re: Perko question [Re: steve_twice]
Bob Landry Offline
Extreme Angler

Registered: 08/10/11
Posts: 2781
Loc: Austin, Tx
If the motor is the only thing on the cranking battery, there is no current draw unless the key is turned on. If there are other devices on it such as a radio that uses a constant voltage to retain memory settings, then there will be a drain on the battery.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115

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#11740597 - 07/25/16 07:43 AM Re: Perko question [Re: steve_twice]
BODA Offline

Registered: 06/10/14
Posts: 332
Loc: Eagle Mountain Lake
you will NEVER say "man I wish I hadn't turned that stupid switch off"

#11740775 - 07/25/16 09:13 AM Re: Perko question [Re: steve_twice]
steve_twice Offline

Registered: 08/28/03
Posts: 334
Loc: Flower Mound, TX
Thanks guys. Appreciate the feedback.

#11749863 - 07/30/16 09:13 AM Re: Perko question [Re: steve_twice]
Curtbass Offline
Extreme Angler

Registered: 04/17/15
Posts: 1573
Talons draw milliamps when hooked up. Ethernet also. If you have these they draw unless you have them switched separately. I have Talon direct to battery & pull the 3 amp blade fuse when not in use. I also ran independent wires from battery to Ethernet & Depthfinders to lessen interference. I have switch for them. I WILL install a single point Perko power switch to eliminate all draw. Simple one switch when ready to go.
92' ChampioN 201DCR Elite
13' Yamaha250SHO

#11750272 - 07/30/16 03:52 PM Re: Perko question [Re: steve_twice]
JesseX Offline
TFF Team Angler

Registered: 06/10/02
Posts: 3753
Loc: Republic of Texas
The point of a Perko is to isolate the battery from any current/amp draw. You can also use them to combine power with your trolling motor batteries in the event your starter battery is weak.

My bay boat has one. Has saved me more than once.

#11751322 - 07/31/16 10:23 AM Re: Perko question [Re: steve_twice]
Fritz423 Offline
Pro Angler

Registered: 04/25/12
Posts: 531
My boat's been rewired so many times the battery dies in 3-4 days unless we turn the main bus off. Every time I take the deck off I pull out another pound of old disconnected wires. Now I charge and can go out a couple months later and it cranks right up.
Wishin' I was fishin', and dreaming of beer


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