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Search: Posts Made By: tac
Forum: Newport 09-06-2019, 10:56 PM
Replies: 7
Views: 6,484
Posted By tac
Exhaust Blowers

Don’t reverse the flow of your exhaust blower. Both the Coast Guard and ABYC state that gasoline inboard engines must have one or more exhaust blowers. While the ABYC recommendation is not binding...
Forum: Electrical 08-24-2019, 10:24 AM
Replies: 16
Views: 4,710
Posted By tac
An easy way to quickly bypass the ammeter (if you...

An easy way to quickly bypass the ammeter (if you have easy access to the back of the ammeter) and not have to run a new wire, is to remove one of the orange wires from its stud on the ammeter and...
Forum: Troubleshooting 08-16-2019, 08:54 AM
Replies: 38
Views: 8,513
Posted By tac
Don’s Explanation

https://moyermarine.com/techtip001/
Forum: Electrical 05-21-2019, 05:43 PM
Replies: 25
Views: 9,956
Posted By tac
A last post, inspired by your photo of the...

A last post, inspired by your photo of the batteries.

1. Your proposed (simplified) hookup in post #16 looks OK.
2. The black and red cables to the batteries look like #2s.
3. The battery...
Forum: Electrical 05-19-2019, 04:09 PM
Replies: 25
Views: 9,956
Posted By tac
I’ve taken your sketch of post 1 and revised it...

I’ve taken your sketch of post 1 and revised it in the first diagram below to show the changes needed to remove the Isolator. I have not shown any fuses other than what is shown on the original. ...
Forum: Electrical 05-17-2019, 09:20 PM
Replies: 25
Views: 9,956
Posted By tac
Switch Contact Action

I should mention this afore forgetting it.

Your isolator and alternator failure may have been caused by opening (disconnecting) the alternator output while the engine was running. This causes a...
Forum: Electrical 05-17-2019, 08:31 PM
Replies: 25
Views: 9,956
Posted By tac
That was long-winded? Ha! Compare with my last...

That was long-winded? Ha! Compare with my last two posts.

Your photo confirms it’s a proper (and quite old - 20+ years?) battery selector/disconnect switch. It appears to be 4 position, maybe...
Forum: Electrical 05-17-2019, 03:29 PM
Replies: 25
Views: 9,956
Posted By tac
Neuse: Well, Yes and/or (inclusive OR) No. ...

Neuse:

Well, Yes and/or (inclusive OR) No. I’ll be cautious. I have no idea what this “Sel Sw” is. What are it’s contacts rated for? A picture (Suitable Fo’ Framin’) of the front of this...
Forum: Electrical 05-16-2019, 10:06 PM
Replies: 25
Views: 9,956
Posted By tac
I think you understand this, but let me emphasize...

I think you understand this, but let me emphasize it. Your setup, with the Motorola alternator, or any alternator with a built-in regulator, does NOT allow you to connect wires to the alternator...
Forum: Electrical 05-16-2019, 05:05 PM
Replies: 25
Views: 9,956
Posted By tac
Alternators

If you would like to know how alternators work, possible places that discuss this include:

https://alternatorparts.com/understanding-alternators.html

The best, and most understandable however,...
Forum: Electrical 05-16-2019, 01:04 PM
Replies: 25
Views: 9,956
Posted By tac
No. Most toggle switches are rated at no more...

No. Most toggle switches are rated at no more than 10 amps. If you mean one wire is from the alternator output (you said “to the alternator”) then that can carry, and switch, the full alternator...
Forum: Electrical 05-15-2019, 09:39 AM
Replies: 25
Views: 9,956
Posted By tac
Motorola Alternator MR12N451D

Prestolite Leece-Neville bought out Motorola’s line of alternators a few years ago. Yours is probably a 37 amp model MR12N451D. The Prestolite web site is not easy to navigate, but the parts list...
Forum: Fuel System 10-28-2018, 08:43 AM
Replies: 13
Views: 4,101
Posted By tac
Results of search for control cable. Your...

Results of search for control cable. Your fitting should be somewhere in here. They’re commonly available, if you don’t have something special.
...
Forum: Ignition System 09-02-2018, 02:36 PM
Replies: 8
Views: 3,471
Posted By tac
As Ed says, most likely neon or other gas tube: ...

As Ed says, most likely neon or other gas tube:
https://en.wikipedia.org/wiki/Neon_lighting?wprov=sfti1

For those not theory-phobic, it’s probably Townsend Discharge, an electric field phenomena,...
Forum: Overhaul 08-31-2018, 09:10 AM
Replies: 16
Views: 5,536
Posted By tac
Accessory Drive Exchange

I’ve been patiently waiting for someone to reference this gem from the Support/Tech Tip section of the Moyer site:

https://moyermarine.com/techtip001-2-2-2-2-2-2-2/

This, plus the FAQs, and...
Forum: Troubleshooting 08-05-2018, 04:58 PM
Replies: 11
Views: 2,809
Posted By tac
Oil Leaks

If you have a mechanical oil pressure gauge, or a remote mounted electrical sender, check to see if the brass NPT fitting into the front of the block, or its copper tube, has a crack. In my case,...
Forum: Troubleshooting 08-03-2018, 08:10 AM
Replies: 76
Views: 19,366
Posted By tac
Coil Mounting

Allow me to add my final thoughts on the matter. I believe Neil and I are saying pretty much the same thing: coil failure is caused by coil primary wire insulation breakdown due to heat. That heat...
Forum: Troubleshooting 08-02-2018, 04:13 PM
Replies: 76
Views: 19,366
Posted By tac
Coil Mounting

Yes, Neil. I moved the coil off the engine out of exasperation but largely on principle. That principle is that heat is the biggest killer of insulation. No more testing was done to determine how...
Forum: Troubleshooting 07-31-2018, 08:25 AM
Replies: 76
Views: 19,366
Posted By tac
I didn’t mention that in 2015, before moving the...

I didn’t mention that in 2015, before moving the coil off the engine, I mounted it on the engine with 1” nylon spacers for each bolt. This held the coil off the engine by an inch, but still held in...
Forum: Troubleshooting 07-30-2018, 09:35 PM
Replies: 76
Views: 19,366
Posted By tac
Coil Location

Neal is right advising caution without concrete evidence. I’ve had the Indigo electronic ignition, with the Crane Cams/FAST XR700 control unit, since 2000 (newly installed hour meter - 0 hours). I...
Forum: Troubleshooting 07-30-2018, 08:03 AM
Replies: 2
Views: 2,102
Posted By tac
Gauge Sender Testing

You haven’t said which manufacturer. Most (?) A4 OEM gauges were Stewart Warner. These references should help. A search of this forum should give you plenty of past discussions.
...
Forum: Electrical 07-21-2018, 04:01 PM
Replies: 9
Views: 2,820
Posted By tac
The inrush current to a motor on starting is the...

The inrush current to a motor on starting is the same as “Locked Rotor” current found on manufacturer’s drawings and data sheets (if you can find one for consumer goods). As Ed said, it can be about...
Forum: Electrical 06-24-2018, 03:29 PM
Replies: 3
Views: 2,952
Posted By tac
Cool idea, poorly executed Terminal Tamer ...

Cool idea, poorly executed

Terminal Tamer
1. The copper bus bar is not tin plated. Once it’s developed a copper oxide or copper sulphate corrosion coating, it’s resistance will increase.
2....
Forum: General Interest 06-23-2018, 01:44 PM
Replies: 10
Views: 3,117
Posted By tac
I had the same question a bit ago and found this...

I had the same question a bit ago and found this via the Practical Sailor magazine/site.

https://www.practical-sailor.com/issues/37_31/features/Joker-Valves-for-Marine-Heads_11065-1.html

You...
Forum: Cooling System 06-19-2018, 10:45 AM
Replies: 14
Views: 6,010
Posted By tac
As to frequency, an older manual says, ...

As to frequency, an older manual says,

“Lubrication of the water pump seals is provided from the grease cup located on the pump body. Periodically tighten the cup until some resistance is felt to...
Showing results 1 to 25 of 204

 
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