Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 21-06-2019, 11:14   #1
Registered User
 
APWTryfan's Avatar

Join Date: Sep 2018
Posts: 25
2GM20 Alt/Starter Wiring

Good*Day!
I have new to me C&C33 mII with 2GM20 and am adding solar with battery*upgrade.
I want to run*alternator to house bank*with*ACR*to start battery. Solar and AC charger will also*run to house.

The current Alt/Starter*runs via a single wire to common post on Off-1-All-2 switch.

I*would like to run Alt to battery and Starter to*switch.*

Q1*- is it possible to separate Alt/Start wires and if so, is there anything*in particular I should be looking out for with 2GM20?

Q2 - House bank will be 2 x AGM G31 220AH total in*parallel. Is there any risk with current alternator (sorry do not know the*make) charging these new AGM's?

Thanks!

Andy

*
__________________

APWTryfan is offline   Reply With Quote
Old 23-06-2019, 11:11   #2
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 7,762
Re: 2GM20 Alt/Starter Wiring

1 OEM 1-2-B Switch Wiring History Alternator/Batteries & "The Basic" 1-2-B Switch BEST Wiring Diagrams


2 Hitachi Alternators 101 http://forums.catalina.sailboatowner...d.php?t=166123 This comes up so often on other boating forums...
__________________

__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 23-06-2019, 17:13   #3
Registered User
 
APWTryfan's Avatar

Join Date: Sep 2018
Posts: 25
Re: 2GM20 Alt/Starter Wiring

Quote:
Originally Posted by Stu Jackson View Post
Hi Stu thanks for all your help! I have poured over all the material you have provided here and on other forums.

My scenario is where the starter and alternator are connected via single wire to common post on switch.

I have 2 house and will soon add a separate 3rd start/reserve battery.

If I leave the alt/start connection on common post of Off-1-All-2 switch and always leave switch on 1 (house and start), my new 3rd battery would function only as an emergency reserve. The only disadvantage is the risk associated with switch turned to Off position while running engine.

I would keep 3rd reserve battery charged with ACR.

My immediate goal and impetus for this project is installation of 200W solar wired directly to house. Time is ticking as we head out soon and need to get solar up and running ASAP while minimizing work and impact to existing system.

Do you see any other disadvantages with this scenario?

I will also consider exchanging my 2 x 12V G31 AGM's with FLA to avoid any potential charging issues from ALT but will research more.

Thanks again!

Andy
APWTryfan is offline   Reply With Quote
Old 23-06-2019, 17:51   #4
Registered User
 
APWTryfan's Avatar

Join Date: Sep 2018
Posts: 25
Re: 2GM20 Alt/Starter Wiring

Another post on this forum has answered my question - voltage spikes from starting with a "shared" bank can damage electronics.

2 weeks ago I would never have thought I would be speaking this new language - I'm a learnin'!
APWTryfan is offline   Reply With Quote
Reply

Tags
2gm, 2gm20, wiring

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Starter issue: starter motor takes several attempts Ryban Engines and Propulsion Systems 22 29-11-2018 16:50
Dedicated starter battery or lithium jump starter? Reefmagnet Electrical: Batteries, Generators & Solar 9 25-09-2018 19:53
For Sale: Genuine Yanmar Starter 128170-77010 1GM, 1GM10, 2GM20, 3GM30, 2GM, 2GMF, 3GM, 3G kiltym Classifieds Archive 0 20-10-2015 07:04
Yanmar 2GM20 v 2GM20 (YEU) engines - Surprise with "E" serial numbers. Wotname Engines and Propulsion Systems 16 31-07-2015 01:02
Want To Buy: Raymarine RD218 or Alt Radar Chuteman Classifieds Archive 0 07-08-2011 13:32



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.