Mercotronic 98

[billw]

Okay, so I hate to ask all the same questions; but I just picked up a Merc-o-tronic Model 98, for the first time. (I have been using a Stevens.) Is there a user’s guide with manufacturer specs available? What is the purpose of the 7.5 V battery if it has a 120V plug? And I know I should know the answer to this by now; but what are you guys using for a battery? Thanks!

Long live American manufacturing!

[oldlure]

It is here members only, inner sanctum, old iron reference, manuals

https://aomci.org/wp-content/uploads/2019/02/Merc-O-Tronic-ilovepdf-compressed.pdf

[foot_doctor]

The 7.5 volt battery was meant to be used for the coil power, coil continuity, and resistance tests. They require DC current. It can be replaced with a 7.2 volt rechargeable drill battery. The 120 volt AC circuits are meant for capacitor tests. Neither power will do all tests. I use a 7.5 volt DC wall-wart for my 98. R.T.

[dave-bernard]

you can get remote controlled RC toys 7.2 volt battery with charger on Ebay for $20.00 or less.

• This reply was modified 4 years, 6 months ago by dave-bernard.

[billw]

foot_doctor wrote:

The 7.5 volt battery was meant to be used for the coil power, coil continuity, and resistance tests. They require DC current. It can be replaced with a 7.2 volt rechargeable drill battery. The 120 volt AC circuits are meant for capacitor tests. Neither power will do all tests. I use a 7.5 volt DC wall-wart for my 98. R.T.

Thanks guys. So, I am assuming a wall wart is an AC/DC converter or transformer, like a phone charger or the like? Do we know the minimum amp output requirement for such a device? I understand the 7.5 volt part. I think I like that idea a little better than having a Chinese lithium battery in the house, for what little use it will get..

Edit: The most amps I see available on eBay is 2 amps. Doesn’t seem like much….

Boy, when you take the original battery out of the machine, there is nothing to it! I mean, my Stevens is about twice the size, has old glass tubes in it and is really built.

My 98’s dial plastic is a bit faded too. I was going to try headlight restorer on it. Any ideas there? Thoughts?

Long live American manufacturing!

• This reply was modified 4 years, 6 months ago by billw.

[billw]

oldlure wrote:

It is here members only, inner sanctum, old iron reference, manuals

https://aomci.org/wp-content/uploads/2019/02/Merc-O-Tronic-ilovepdf-compressed.pdf

Now THAT’S A book! Thanks for that!

Long live American manufacturing!

[billw]

Okay, this seems to be a Ni Cad so I feel better. It has +5 amps and coil specs don’t seem to need more than 3. Maybe I am over simplifying; but I bought this one:

https://www.ebay.com/itm/7-2V-volt-5300mAh-Ni-Mh-rechargeable-battery-pack-RC-Tamiya-Plug-Charger/323701161484?hash=item4b5e17be0c:m:mr9ZL3Q0COWFUL5O_8O9tLA

Long live American manufacturing!

[RICHARD A. WHITE]

I am working on a conversion to use a 7.5 volt DC laptop power supply instead of a battery.

Quick and simple to install. The laptop power supply plugs directly into a connector like this.
https://www.amazon.com/2-1mm-5-5mm-Female-Power-Adapter/dp/B003MHUN7S

Mount this inside your case, connect the positive and negative wire that would normal go to the battery to this connector, then plug in the power supply like this: I will get the proper part number this evening.

And you will NEVER need to worry about an uncharged battery.

FYI… Mercotronic sold a unit as an accessory to do just this… I can post photos of their catalog to corroborate this statement, showing actually voltage and amperage of the unit.

Just not had time to write the article.

Respectfully

Richard

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[The Boat House]

• This reply was modified 3 years, 2 months ago by The Boat House.

[dave-bernard]

If you use a battery you don’t need plug in and can do it at the dock.

[Author]

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