Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Mechman Alternators
Mechman 240 Amp High Output Alternator GM Ecotec - Single Wire Turn On
SKU: 11140240
Description
S Series
The S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower per Kw produced than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions. The 240 amp model offers the best balance between peak output, and output at engine idle RPM.
Installation Notes:
A single wire on the provided pigtail gets connected to any ignition switched 12V+ source to turn the alternator on and off with the ignition switch. Simply run a properly sized positive and ground cable from the alternator to the terminals of the battery and the alternator will work perfectly.
The installation of this unit will cause the "check battery" light to stay on in the dash.
This unit comes equipped with a smaller 1.75 inch diameter alternator pulley, and will require a slightly shorter drive belt to be installed for proper belt tension.
| Name | Model | Engine | Year(s) | Amperage |
|---|---|---|---|---|
| CHEVROLET | Cavalier | 2.2 Ecotec | 03-05 | 240a |
| CHEVROLET | Cobalt | 2.2 / 2.4 non- SC | 05-09 | 240a |
| CHEVROLET | HHR | 2.2 / 2.4 non- SC | 06-11 | 240a |
| CHEVROLET | Malibu | 2.2 / 2.4 non- SC | 04-12 | 240a |
| OLDSMOBILE | Alero | 2.2 | 02-04 | 240a |
| PONTIAC | G5 | 2.2 | 07-10 | 240a |
| PONTIAC | G5 | 2.4 | 07-08 | 240a |
| PONTIAC | Grand Am | 2.2 | 02-05 | 240a |
| PONTIAC | Sunfire | 2.2 | 02-05 | 240a |
| SATURN | Aura | 2.4 | 08-09 | 240a |
| SATURN | Ion | 2.0 | 04-07 | 240a |
| SATURN | Ion | 2.2 | 03-07 | 240a |
| SATURN | Ion | 2.4 | 06-07 | 240a |
| SATURN | Vue | 2.2 | 02-07 | 240a |
| SATURN | Vue | 2.4 | 08-10 | 240a |
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Mechman Alternators |
| Part Number | 11140240 |
| Category | High Output Alternators |
About MOTORMIA
Buy with Confidence
Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy