If it's new and has never been run, you'll have to do the battery for sure. It's a 9-volt style NiMH battery that makes only 8.4 volts. Most hardware stores have them. You can also look into replacing it with a BCR so that you never need to worry about replacing the battery ever again.

You'll also want to visually check the speaker before applying power, if the magnet is flaking apart or deteriorated, that too will need to be replaced. A bad speaker can ruin the electronic quickly.

Please list the MTH product number.

Thank you.

MTH engine here: https://mthtrains.com/30-2357-1

Ben, That engine has  3 volt circuit boards. So, If you put the engine on the track and apply 10-12 volts with your AC transformer and give the battery a few minutes to charge you should be fine. If you go to the MTH website and put the 30-2357-1 number in the product locator you will pull up all the data on the engine. Then go to support and on the left side of the options you can pull up the manual and learn all about your engine. If the battery doesn't take a charge then you should replace it with a BCR which is a capacitor that eliminates the need for a battery. You can purchase one from some train stores or go to the J&W Electronics website and order one. Have fun.

Hi according to new MTH Websight 30-2357-1 is a ps 2 5-volt board it is not a ps 2- 5-volt board so you need a 8.4 volt battery. or you can use a super cap!

you can also use

EBL 9V Rechargeable Batteries 9 Volt Lithium ion 600mAh Li-ion Batteries (4-Packs)

Alan

@Alan Mancus posted:

Hi according to new MTH Websight 30-2357-1 is a ps 2 5-volt board it is not a ps 2- 5-volt board so you need a 8.4 volt battery. or you can use a super cap!

you can also use

EBL 9V Rechargeable Batteries 9 Volt Lithium ion 600mAh Li-ion Batteries (4-Packs)

Alan

Alan, I'd beg to differ on that engine being a 5-volt board. I too thought it was beings that it came out in early 2003 and 3-volt systems really didn't hit the mainstream until later in 2004 and the 5-5volt boards still being used into 2005 on some models.  According to the user manual in the support tab, it is a 3-volt board and uses the AA / AAA style 2.4-volt battery pack. A BCR-2 is what is needed in that engine according to the manual.

Also, I'd exercise caution on the EBL battery you reference above, That is a Lithium Ion rechargeable, those are not designed to be charged through the 9-volt output but rather through an integrated USB port.

H 1000 , can the MTH  GREEN  battery pack be used instead of the BLUE pack in the ps2 /3volt #20-3120  until I find a BCR2?

It's a NEW engine from early 2000s and the seller reported that the speaker (  STAR  4ohm / 3watt ) was a new install.

yes

@Vernon Barry posted:

yes

Thanks once again sir.

So, if I replace it with a regular BCR (the ones that look like 9v batteries) I will be fine? Thank you.

@BenLMaggi posted:

So, if I replace it with a regular BCR (the ones that look like 9v batteries) I will be fine? Thank you.

As long as you replace whatever battery is in there, with similar compatible BCR type.

Here's the fundamental problem. Your engine was produced according to the product page 2003 March. The manual is dated 2004!! The manual says it's a PS2 3V- again, problem is, did MTH post a newer manual to the website that may not match your engine exactly.

ONLY you with hands on the engine can determine what you actually have.

Or post some pictures of the internals after you remove the shell here to the forum.

@BenLMaggi

So, if I replace it with a regular BCR (the ones that look like 9v batteries) I will be fine? Thank you.

Ben , I don't have the exact same Railking diesel engine that you have but I do have  Railking ps2 /3 volt diesels that I used to charge with MTH's nice charger.   I have since replaced the diesel's batteries with BCR2s.

The photo below shows a charging port on the bottom of the diesel for a ps2/3volt system.  It has two pins.  If yours looks like a two pin charging port .......then I believe you need a BCR2.  ................... Your charging port area may be a different color but the two pins in that shape should be for the 3volt system.

I will remove the shell this weekend and see what is under the hood.

@BenLMaggi posted:

I will remove the shell this weekend and see what is under the hood.

Ben , you shouldn't have to take the shell off..........just turn it over and look at the bottom of the engine. USUALLY somewhere between the two sets of trucks near the speaker housing.  I don't have a photo but it should look like a hole with a single recessed pin for the 5volt system..........the 3volt has the two pin outlet..

On my MTH charger there are two seperate wires coming of the transformer.    One with the two pin connector for the 3volt  and one wire with just a single connector for a 5volt.