Recmar Yanmar 2GM 3GM A31 Alternator Belt 25132-003100
REC25132-003100
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Regular price£20.00
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Yanmar 2GM / 3GM A31 Alternator Belt
25132-003100 | Compact marine diesel accessory belt
Aftermarket Recmar A31 alternator and fresh-water-pump drive belt for selected Yanmar 2GM and 3GM marine diesels.
VERIFY BEFORE ORDERING: Yanmar GM models changed across production ranges. Confirm the complete model suffix, serial prefix and OEM reference.
Key Features
- A31 alternator-drive V-belt
- Selected Yanmar 2GM and 3GM models
- Aftermarket Recmar replacement
- Cross-reference to earlier GM belt numbers where catalogued
- One belt supplied
Technical Specs
| Belt designation | A31 |
| Function | Alternator / fresh-water-pump drive |
| Engine family | Yanmar GM series |
| Supply | 1 belt |
| 4Boats SKU | REC25132-003100 |
Compatibility / Fitment Guide
| Application | Verified fitment | Limits / checks |
|---|---|---|
| Yanmar 2GM | 2GMLP; selected 2GM20 and 2GMYE applications | For 2GM20, check serial prefix/range; E-prefix coverage is documented. |
| Yanmar 3GM | Selected 3GM30 applications using 25132-003100 | Do not extend to every 3GM30F variant without catalogue match. |
| Earlier references | 25132-003000 / 128670-77350 where officially catalogued as superseded | Verify supersession for the engine serial. |
Final fitment check: Confirm A31 and Yanmar 25132-003100 in the exact GM-series parts diagram, including serial prefix.
Part Number Cross Reference
| Yanmar | 25132-003100; A31 |
| Earlier references (verify) | 25132-003000; 128670-77350 |
| Recmar / 4Boats | REC25132-003100 |
Frequently Asked Questions
Is it genuine Yanmar?
No. It is aftermarket Recmar.
Does it fit every 2GM/3GM?
No. Model suffix and serial matter.
Is it the seawater-pump belt?
No; the verified use is the alternator/fresh-water-pump accessory drive.
Retension a new V-belt after its initial bedding-in period.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
