Notices

Wiring Quandry

Old 01-02-2003, 01:40 AM
  #1  
MemberCaptains Club Member
Thread Starter
 
Join Date: Oct 2002
Location: Fort Pierce, FL
Posts: 31
Default Wiring Quandry

I am running two 98 Yamaha 200's on my GW Sailfish. There is a separate charging circuit on each motor for an alternate battery. I am installing a third battery. Since I will be at times using just one motor,can I run both charging circuits to the the positive terminal without causing problems. Or, do I need to install a switch in order to designate which unit to supply charge to the third battery. Is there another solution, that will not require manually selecting circuits if a switch is necessary?
justdocked is offline  
Old 01-02-2003, 03:34 AM
  #2  
Senior MemberCaptains Club Member
 
Join Date: May 2002
Location: Ayaz Beach
Posts: 899
Default Wiring Quandry

I'm sure there's a way with some solenoids or diodes and these guys will tell you. The yami diagram for two engines and three batts doesn't show it. Do you really need to charge the aux batt during the times your using the other engine alone?
PeteH is offline  
Old 01-02-2003, 06:23 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: roswell, ga, fulton
Posts: 2,792
Default Wiring Quandry

justdocked,
would advise going to a dual bat. setup on each engine with Perko type switching. Allows good bat. mgmt. and is straight forward. Max flexability.
Peace of mind if managed properly.
Joe

Sapelo kat Rider
popl is offline  
Old 01-02-2003, 03:11 PM
  #4  
MemberCaptains Club Member
Thread Starter
 
Join Date: Oct 2002
Location: Fort Pierce, FL
Posts: 31
Default Wiring Quandry

I appreciate the replies Pete and Sapelo, but I am somewhat limited on space for two more batteries. Since I'm in the middle of installing the new electronics, ie AP, VHF, FF and GPS, and running new hyd. lines for the steering I thought I could pull three more 6ga. wires and link in additional power source and charge from the outboards. If I can't quite swing four batteries, it seems like three would be better than two. Maybe there's a site with possible multi-battery set-ups somebody could refer me to?
Thanks again,
Ed
justdocked is offline  
Old 01-02-2003, 04:15 PM
  #5  
Senior Member
 
Join Date: Apr 2002
Location: Mass.
Posts: 924
Default Wiring Quandry

If you look at the Yamaha rigging materials that come with the engines, you will see that one of the wiring configurations uses three batteries with the smaller (charging) leads from both engines going to the third or "house" battery -- just what you want to do. My boat was rigged exactly that way by the Regulator factory so that the house battery gets charged even if only one engine is running. It does not appear to present any problems to the charging circuits on the motors, at least with the 250 EPI. I am pretty sure that your engines have the same system. Perhaps you could get your Yamaha mechanic to check in rigging manuals to be certain.
Saltdog is offline  
Old 01-02-2003, 04:48 PM
  #6  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: May 2002
Location: Skaneateles, New York
Posts: 5,483
Default Wiring Quandry

Take a look... http://www.perko.com/cat_frames.html I'm not sure what switches your using but this diagram shows how to wire three batteries in, using two Perko switches. Hope this helps! Oops...I'll add a little more. When you get to the above page, go to Item type, Electrical...then, Battery Selector Switch...then, 8501-8502, and finally see wiring diagram...it's the last one! This is, I believe, what Saltdog is saying, too.

"Never enough time to do it right; ALWAYS enough time to do it over." Boston Whaler, "MUMBLER", 24' Outrage (1996), twin 175 HP Evinrude Ocean Pros.

[This message was edited by Mumblerone on 01-02-03 at 10:36 PM.]

[This message was edited by Mumblerone on 01-02-03 at 10:37 PM.]
Mumblerone is offline  
Old 01-03-2003, 05:03 AM
  #7  
Senior MemberCaptains Club Member
 
Join Date: May 2002
Location: Ayaz Beach
Posts: 899
Default Wiring Quandry

Hold on, on my rigging materials from yami, only one engine gets to charge the second batt. The engine with the single batt either gets it's secondary charging lead capped or connected to the positive of the single batt. I would think that putting the two secondaries on one batt may cause a problem..
PeteH is offline  
Old 01-03-2003, 05:40 AM
  #8  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: May 2002
Location: Skaneateles, New York
Posts: 5,483
Default Wiring Quandry

PeteH...are you referring to the Perko info or the Yammi stuff?

"Never enough time to do it right; ALWAYS enough time to do it over." Boston Whaler, "MUMBLER", 24' Outrage (1996), twin 175 HP Evinrude Ocean Pros.
Mumblerone is offline  
Old 01-03-2003, 06:08 AM
  #9  
Senior MemberCaptains Club Member
 
Join Date: Jan 2002
Location: Norfolk
Posts: 289
Default Wiring Quandry

justdocked

Each 250 should have a dual pin circular female connector located on the starboard side, and that connector has a male blank plug installed as a end cap. You can use that plug to make your charging cable. It will have the 2 connection pins in the plug that can be carefully removed, soldered to 12 AWG wires, route thru rigging and joined together in a ring terminal for the plus side of the third battery.
You just need an ON/OFF perko switch for the house battery and your Main CB should be moved to the house battery. Your setup should have been installed with a third battery.

How is the main 12VDC power panel connected? Wired to one or both batteries?

BTW the reason I know is the rigger left out my charge cables and I made up two cables. Grady sent me two and I still have one of the cables I made. Will send you the cable for a pattern to make up another that you will need for the second engine, if you like.

Check with Grady Tech Support.

[This message was edited by HookMan on 01-03-03 at 09:21 AM.]
HookMan is offline  
Old 01-03-2003, 07:48 AM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: Key Largo, FL, USA
Posts: 593
Default Wiring Quandry

I have twin Yami 150's, each with it's own battery and 2 Perko switches, one for bat select for each engine. I have been using a third battery to feed my autopilot and have been charging this battery using a Radio Shack Diode bridge fed from the main charge line from each engine. Has worked flawlessly for 10 years. Since I frequently troll with one engine, what ever engine is running supplies the charge current for the autopilot battery. When both engines are running, both engines supply the charge current.
The circuitry consists of a single pole ON/OFF switch rated at 10Amps, an inline fuse of 10Amps and the diode bridge. Total parts cost of about $15 or thereabouts.
The same circuit also works fine for the Yamaha Fuel Management system when you troll with one engine. Can also be used to prevent electronic equipment shutdown when an engine is started.

If you are interested in trying the circuit, let me know and I will give you the Radio Shack parts, which I don't have available at this time.
Gil Morgan is offline  
Old 01-03-2003, 01:33 PM
  #11  
MemberCaptains Club Member
Thread Starter
 
Join Date: Oct 2002
Location: Fort Pierce, FL
Posts: 31
Default Wiring Quandry

Thank you each and everyone for your assistance.
Both of the Yamaha 200's have an auxiliary charge circuit via a 12ga wire with 30amp in line fuse and a single female bullet connector capped off on the starboard side. Getting assistance from the dealership is like pulling hen's teeth, I presume because I have yet to line their pockets, even though I am quite amiable and thanks to this site, very well informed.
Gil, the diode set-up sounds ideal, if these charge circuits need to be isolated. I am however leaning toward utilizing the the capped off lines shooting straight to a ring terminal on the positive post of the add-on battery as Saltdog and Hookman must have on their rigs.
Hookman, since you've been where I'm going- main CB panel is currently hooked up to #1 Starboard batt, but things are changing fast. Planned on integrating House(Group 31)>ON/OFF> CB. Do I need to eliminate the #1 batt connection?
justdocked is offline  
Old 01-06-2003, 08:22 AM
  #12  
Senior MemberCaptains Club Member
 
Join Date: Jan 2002
Location: Norfolk
Posts: 289
Default Wiring Quandry

justdocked

checked yesterday and have 2 aux charge cable assy (one for each engine) post email or phone and they are yours, you pay shipping.

My setup: 1 Ship's battery (+12VDC to ON/OFF SW to 40AMP breaker (1ft from SW) to Power Panel main feed) The Aux charge cables are connected to On/Off SW (With SW Off complete Ship's battery isolation).

2 Start batteries: Each engine's start cable has its own 1/2/Both/OFF SW. Start Batt #1 +12VDC is daisy chained to post 1 of each 1/2/Both/OFF SW. Start Batt #2 is daisy chained to post 2 of each 1/2/Both/OFF SW.
Bilge Pumps are connected at Port SW's lug 1.

This setup allows manual swapping Ship's with a Start Battery and run both engines off one in emergency (If you ran radar all day while trolling and drained battery cause charge couldn't keep up).
HookMan is offline  
Old 01-06-2003, 07:23 PM
  #13  
MemberCaptains Club Member
Thread Starter
 
Join Date: Oct 2002
Location: Fort Pierce, FL
Posts: 31
Default Wiring Quandry

Hookman,
Thank You for the info, and yes, I'll definitely take you up on the offer of the charge cables. My e-mail is justdocked@aol.com
justdocked is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread