Like Tree0Likes

Wiring Diagram Needed: HEI + Voltmeter, Mercuiser 288 350 SBC

Reply
Old 05-15-2011, 06:29 PM
  #1
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default Wiring Diagram Needed: HEI + Voltmeter, Mercuiser 288 350 SBC

So I have a mercruiser 260, which is a 350 small block chevy. Original date is 1978, and at that time it had a standard distributor, and an ammeter.

In all my schemetics, the output of the alternator goes all the way forward to the front of the boat, into the ammeter, then through the ignition switch. My new gauges have a volt meter, so I'm running a small wire off of the ignition switch. Should be fine, I think. But how does the charging system look? Does the alternator get hooked up the battery or the circuit breaker or what?

Also, since it now has HEI, do I just completely ignore the 'resistence' wire?
cash68 is offline  
Reply With Quote
Old 05-16-2011, 12:41 PM
  #2
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

Bueller?
cash68 is offline  
Reply With Quote
Old 05-16-2011, 01:54 PM
  #3
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

So this is what it basically had before:



but now that I have a voltmeter, it will be more like this:



What's confusing me is the circuit breaker and starter solonoid.
cash68 is offline  
Reply With Quote
Old 05-16-2011, 02:31 PM
  #4
Registered User
Gold Member
Trade Score: (1)
 
Join Date: Dec 2010
Location: sunny south florida
My Boats: 31thunder/ 50 thunder/running hot rebuilder
Posts: 333
Default wiring

first , the hei will need 12v to run , your old dist may have a resistor wire . If get jammed up pm your phone # and i will walk you through it.
throttleman is offline  
Reply With Quote
Old 05-16-2011, 03:14 PM
  #5
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

Yeah, I'm guessing I don't need the resistor wire at all, just leave it disconnected. Just run the "running" position from the ignition key to the distributor. Right?
cash68 is offline  
Reply With Quote
Old 05-16-2011, 04:23 PM
  #6
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

This is from my mercruiser manual:

cash68 is offline  
Reply With Quote
Old 05-16-2011, 05:50 PM
  #7
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

cash68 is offline  
Reply With Quote
Old 05-16-2011, 06:00 PM
  #8
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

cash68 is offline  
Reply With Quote
Old 05-16-2011, 06:03 PM
  #9
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

cash68 is offline  
Reply With Quote
Old 05-16-2011, 06:37 PM
  #10
Registered
Thread Starter
 
Join Date: Jul 2010
Location: Madison, WI
My Boats: 1978 Sleekcraft Aristocrat
Posts: 298
Default

Okay, here is my new schematic. The alternator is a 3 wire, I read that the sensing lead should go to the 12v distribution point, so it maintains 12v at that point. The other wire goes to the alternator warning light, then the ignition switch.

The HEI distributor eliminates the resistence wire, and the two connections are BATT and TACH. The BATT should be from the ignition switch. The tach wire runs to the shift cutout switch, at which point it goes to the actual tach. Here is a pic:

cash68 is offline  
Reply With Quote
Reply



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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 09:12 AM.


Copyright 2011 OffShoreOnly. All rights reserved.