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Author Topic: Motorola Box mounted to bracket on Commander  (Read 6430 times)

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Offline kjerchinger

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Motorola Box mounted to bracket on Commander
« on: August 08, 2015, 12:07:12 PM »
Can someone tell me the purpose  of this Small box / Module with wires going to it ?
It has Motorola embossed on it.
For years I have had a small draw off the Battery, after two or three days without use the battery would be dead, so I always just disconnected it after each use, problem solved.
  A mechanic that was working one other issues for me looked into this, he unplugged the module as he believes it is the culprit of the draw.
   Since doing so, the only problem I am still having with it is an inconsistent Idle. one minute I need to increase the Idle to keep her running, pull a skier, then I need to turn the idle down cause it is idling too fast.
   Does this module, help control the idle speed ?
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Offline backfoot100

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Re: Motorola Box mounted to bracket on Commander
« Reply #1 on: August 08, 2015, 01:39:04 PM »
More info would help. Year, model, hours and what do you have for ignition. A pic would help a lot. I could speculate but Dan and/or Ron probably know right off the top of their head.

My guess would be ignition breaker. Probably corroded, loose or frayed wiring on the engine harness plug or wiring block. Bad ground connections on the engine or under the dash someplace. Time to break out the VOM and start testing voltages from the battery out to the wiring harness and even up to the dash.
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When people run down to the lake to see what is making that noise, you've succeeded.

Offline kjerchinger

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Re: Motorola Box mounted to bracket on Commander
« Reply #2 on: August 08, 2015, 04:41:43 PM »
Thanks BF, this is my 85 advance, 351 Ford, Commander
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Offline backfoot100

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Re: Motorola Box mounted to bracket on Commander
« Reply #3 on: August 09, 2015, 12:06:05 PM »
That's your voltage regulator. That has nothing to do with idle.
Order a replacement from Ron at skiboatpartsonline.com if you have an issue with it. You should not be running with it disconnected. Unregulated voltages could cause all sorts of weird problems sooner or later.
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When people run down to the lake to see what is making that noise, you've succeeded.

Offline kjerchinger

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Re: Motorola Box mounted to bracket on Commander
« Reply #4 on: August 09, 2015, 03:25:34 PM »
Thanks Backfoot. I will get ahold of Ron on Monday.
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Offline shyskier

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Re: Motorola Box mounted to bracket on Commander
« Reply #5 on: August 14, 2015, 08:24:35 AM »
Cause may also be in alternator, but it would be worth trying regulator first ( cheaper )
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Offline kjerchinger

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Re: Motorola Box mounted to bracket on Commander
« Reply #6 on: August 14, 2015, 08:51:26 AM »
I talked to Ron the other day. He dialed me in on the inconsistent idle problem. It turned out the throttle cable needed adjustment at the Carburator.
  He also shipped to me a Voltage regulator, after speaking with him I feel good that this will take care of my problem.
   Thanks Shyskier !
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