Recmar Yanmar 6LY3 Fresh-Water Pump V-Belt 119578-42360
REC119578-42360
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Yanmar 6LY3 Fresh-Water Pump Belt
119578-42360 | 6LY3 marine diesel family
Aftermarket Recmar V-belt for the engine fresh-water cooling-pump drive on verified Yanmar 6LY3 applications.
VERIFY BEFORE ORDERING: This is not correctly described as a generic alternator belt. Yanmar catalogues 119578-42360 in the fresh-water cooling-pump assembly, and some installations specify two belts.
Key Features
- Aftermarket replacement for Yanmar 119578-42360
- Fresh-water circulation-pump drive belt
- Verified 6LY3 model coverage
- Suitable for 12V and 24V variants listed below
- Listing supplies one belt
Technical Specs
| Function | Fresh-water cooling-pump drive |
| Belt designation | 54 (catalogue designation) |
| Engine family | Yanmar 6LY3 |
| Quantity supplied | 1 belt |
| 4Boats SKU | REC119578-42360 |
Compatibility / Fitment Guide
| Application | Verified fitment | Checks / exclusions |
|---|---|---|
| Yanmar 6LY3 propulsion | 6LY3-STP, UTP, ETP, STC, UTC | Confirm model suffix and parts-book quantity. |
| Yanmar 6LY3 24V | 6LY3-STP 24, UTP 24, ETP 24, STC 24, UTC 24 | Electrical system voltage does not change the need to verify the exact belt assembly. |
| Multi-belt installation | Catalogues can show quantity 2 in the pump drive | For a twin-belt set, replace with a matched pair; this listing supplies one. |
Final fitment check: Use Yanmar 119578-42360 and the full 6LY3 suffix. Do not substitute it for the alternator belt without parts-book confirmation.
Part Number Cross Reference
| Yanmar | 119578-42360 |
| Recmar / 4Boats | REC119578-42360 |
Frequently Asked Questions
Is this an alternator belt?
The verified Yanmar application is the fresh-water cooling-pump drive.
How many belts are supplied?
One. Check whether your engine requires a matched pair.
Is it genuine Yanmar?
No. It is a Recmar aftermarket replacement.
When two belts share the load, replace them together with a matched pair and tension evenly.
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