Honda Generator EU3000is Battery Replacement: UB-YTX9-BS-DL116
The Upstart Battery UB-YTX9-BS-DL116 is a 12V, 8Ah sealed lead-acid starter battery listed as a replacement for the Honda EU3000 and EU3000is generators. It comes factory activated and maintenance-free, and it is an aftermarket part, not a Honda one. Use this page to check the fit, read the specs and plan your Honda generator EU3000is battery replacement.
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Will This Battery Fit Your EU3000is?
This battery is advertised for the Honda EU3000 and EU3000is. Honda manuals list an 8Ah battery in one edition and an 8.6Ah battery in another, so look up the rating in your own manual before you order. Run this quick check first.
A repair guide for the EU3000IS1AWK names a Yuasa YTZ10S as the original battery. Yuasa lists the YTZ10S at 93 mm tall and the YTX9-BS at about 105 mm tall. This battery’s exact dimensions are not published. Compare the height and terminal layout with your old battery and the tray before you buy.
Upstart UB-YTX9-BS-DL116 Specifications
| Property | Detail |
|---|---|
| Brand / model | Upstart Battery UB-YTX9-BS-DL116 |
| Amazon ASIN | B01GU2MVCQ |
| Battery size code | YTX9-BS (UB-YTX9-BS base model) |
| Type | Sealed lead acid, rechargeable |
| Nominal voltage | 12 V |
| Listed capacity | 8 Ah |
| Condition on arrival | Factory activated, maintenance-free, no acid to add |
| Listed item weight | 2.72 kg (Amazon Canada listing) |
| Warranty | One year in marketplace listings; confirm current terms |
| Part status | Aftermarket, not a Honda OEM part |
| Advertised fit | Honda EU3000 and EU3000is generators |
| Honda original battery | 8 Ah in one manual edition, 8.6 Ah in another |
| Yuasa YTX9-BS reference | About 150 × 87 × 105 mm, 135 CCA (Yuasa product, not Upstart) |
| Not published for this model | Case dimensions, CCA, terminal layout, charging limits |
Values come from product listings, Honda owner’s manuals and Yuasa reference data. The Yuasa row is a size reference only and does not describe the Upstart battery.
EU3000is Battery Replacement Difficulty
This is a basic hand-tool job. A repair guide for the EU3000IS1AWK uses a 10 mm socket for the front cover nuts and an 8 mm socket for the battery wires. The hard parts are picking a battery that fits and keeping the cable order right. Tap a slice to highlight it.
- 35% Confirming the battery fits
- 20% Opening the cover & disconnecting
- 30% Installing & reconnecting in order
- 15% Final check & test start
The 4/10 score and the effort split are an editorial estimate, not an official rating. Your time and effort may differ by generator version.
How to Replace Your EU3000is Battery
Tap each step to tick it off as you go. Follow your Honda owner’s manual if it differs from this page.
- 1Prepare the generatorTurn the engine switch OFF, unplug all loads and let the generator cool down.
- 2Open the front coverRemove the front cover cap nuts and lift off the cover. Keep the nuts and washers together.
- 3Remove the old batteryRelease the battery holder band. Disconnect the negative (–) cable first, then the positive (+) cable, and lift the battery out.
- 4Fit the new batterySet it in the tray with the terminals in the same positions as the old battery. Check that the cables reach without stretching.
- 5Reconnect the cablesConnect the positive (+) cable first and tighten it securely. Slide the boot over it, then connect the negative (–) cable. Refit the holder band.
- 6Refit the cover and testPut the front cover back, then test the electric start outdoors. If the engine does not start within 5 seconds, release the key and wait at least 10 seconds before trying again.
Check that both cable connections are tight and the polarity is correct. Honda also fits a recoil starter, which is meant for times when the battery voltage is too low to turn the starter motor.
Other Devices Listed for UB-YTX9-BS
Related UB-YTX9-BS listings name these models. They cover the base model, not this exact DL116 version. Confirm the fit for your own equipment.
- Honda EU3000isInverter generator
- Honda EU3000 (2011)Named in the listing title
- Suzuki GSX-R6002007 and 2008 listings
- Suzuki GSX600F Katana2005 listing
- Kawasaki Ninja 250REX250, 2011 listing
- Polaris Predator 5002003 listing
Safety, Charging & Disposal
Honda warns that its battery gives off explosive gas while charging. Keep sparks, flames and cigarettes away. Wear protective clothing and a face shield, or have a skilled mechanic do the battery work. Wash your hands after handling the battery.
- Work with the engine switch OFF and the generator cool.
- Disconnect negative first. Reconnect positive first.
- Use a regulated charger and follow its instructions to avoid overcharging.
- Honda’s manuals give 0.8 A for an 8 Ah battery and 0.9 A for an 8.6 Ah battery. These figures belong to Honda’s own battery, not to this one.
- Take the old battery to a battery recycling point.
EU3000is Battery Replacement: FAQ
Is the Upstart UB-YTX9-BS-DL116 made for the Honda EU3000is?
It is listed as a replacement for the Honda EU3000 and EU3000is. It is an aftermarket battery, not a Honda part. Check the fit against your own generator.
What are the voltage and capacity?
The listing states 12V and 8Ah. Honda manuals list 8Ah in one edition and 8.6Ah in another. Match it to your manual.
Do I need to add acid or water?
No. The listing describes it as factory activated, maintenance-free and ready to install.
Which cable goes on first?
Disconnect the negative cable first. When you reconnect, attach the positive cable first, then the negative cable.
Will a new battery add power or runtime?
No. The battery only powers the electric starter. It does not change the generator’s output or fuel runtime.
Does maintenance-free mean I never need to charge it?
No. Maintenance-free means no acid or water top-ups. Honda gives battery charging instructions in its owner’s manual.
Can I start the generator if the battery is flat?
Honda fits a recoil starter for use when the battery voltage is too low to turn the starter motor.