Temperature Sensor 128275-91340 65C 149F for Yanmar 1GM 2GM20 3GM30 3HM35 Marine
Temperature Sensor 128275-91340 65C 149F for Yanmar 1GM 2GM20 3GM30 3HM35 Marine
Product Overview
Temperature sensor and alarm switch for Yanmar marine diesel engines, rated 65°C (149°F). It replaces Yanmar 128275-91340 and threads into the cylinder head or thermostat housing to drive the dash gauge and the overheat alarm. A failed sensor reads cold on a hot engine, moves in jumps, or never sets the alarm — so an engine losing coolant runs on without warning. Supplied as 1 x sensor.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Temperature Sensor / Alarm Switch Sender |
| Engine Type | Yanmar marine diesel 1GM, 2GM, 3GM, 3HM |
| Switching Temperature | 65°C (149°F) |
| Function | Gauge sender and overheat alarm switch |
| Country of Origin | Taiwan |
| Packaging | 15 x 10 x 4 cm (5.9 x 3.9 x 1.6 in) |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Yanmar | 128275-91340 |
Compatible Engines
Fits the following Yanmar marine engine models:
| Series | Models |
|---|---|
| 1GM | 1GM10VE, 1GM10(YMI), 1GM10, 1GM10L, 1GML, 1GM, 1GM10C, 1GMY-EC, 1GMY-C, 1GY |
| 2GM | 2GM20, 2GM20VE, 2GM20B, 2GM(F), 2GMLP, 2GMLP-C, 2GMZ, 2GM20-YEU, 2GM20C-YEU, 2GMYE-EC |
| 3GM | 3GMLE, 3GM30, 3GM30VE, 3GM30B, 3GM30C-YEU, 3GM30C, 3GM(F), 3GMD |
| 3HM | 3HM, 3HM35, 3HM35C |
What's Included
| Component | Qty |
|---|---|
| Temperature Sensor (Alarm Switch Sender) | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Verify your engine model and serial number before ordering
- Rated 65°C (149°F) — not interchangeable with the 95°C sender used on other Yanmar models
- Check whether your panel uses a gauge or a warning lamp; this sender drives both
- Do not overtighten into an alloy housing — use the specified torque
- 30-Day Easy Returns
- Free Worldwide Shipping
- OEM Quality Without the Markup
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Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
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We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.