Thermostat 0329766 0434137 143F 62C for Johnson Evinrude V4 V8 Outboard 60 65 70 85 120 125 140 185 200 225 250 275 300 HP — Australia Local Warehouse
Thermostat 0329766 0434137 143F 62C for Johnson Evinrude V4 V8 Outboard 60 65 70 85 120 125 140 185 200 225 250 275 300 HP — Australia Local Warehouse
Product Overview
Thermostat for Johnson and Evinrude outboards, opening at 62 °C (143 °F) so the block comes up to temperature quickly and then holds it. It replaces 0329766, 0394409, 0434137 and 0765580, and crosses to Sierra 18-3500 and GLM 13170. One thermostat, package contents as shown in the photographs. Dispatched from our Australia local warehouse.
The thermostat is the part that decides how warm the block runs, and on a loopcharged V4 or V8 it does more work than on a small motor. A stuck-open thermostat is the quiet failure: the motor starts, idles and runs, but it never gets out of cold start enrichment, so it fouls plugs, drinks fuel and makes water in the crankcase over a damp winter. A stuck-closed one shows up the other way, as a fast overheat within minutes of launch.
Both failures look like fuel or ignition problems from the helm. If the motor has been running cold for a season, or the overheat horn has sounded once and cleared, pull the thermostat housing and test the old unit in a pan of water before ordering anything else.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Thermostat |
| Opening Temperature | 62 °C (143 °F) |
| Engine | Johnson and Evinrude V4 and V8 loopcharged two stroke outboard |
| Housing | Not included, thermostat only |
| Quantity | 1 thermostat |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Johnson, Evinrude, OMC | 0329766, 0394409, 0434137 |
| Johnson, Evinrude, OMC | 0765580 |
| Sierra | 18-3500 |
| GLM | 13170 |
Compatible Engines
| Model | Years |
|---|---|
| 60HP V4 | 1989-1992 |
| 65HP V4 | 1987-1992 |
| 70HP V4 | 1986-1992 |
| 85HP V8 | As listed |
| 120HP V8 | 1985-1993 |
| 125HP V8 | 1989-1993 |
| 140HP V8 | 1985-1993 |
| 185HP V8 | 1989-1992 |
| 200HP V8 | 1986-1992 |
| 225HP V8 | 1986-1992 |
| 250HP V8 | 1991-1993 |
| 275HP V8 | 1985-1988 |
| 300HP V8 | 1985-1993 |
Signs the Thermostat Has Failed
| Symptom | What It Points To |
|---|---|
| Motor never reaches normal temperature | Thermostat stuck open, running cold |
| Plugs soot up and fuel use climbs | Cold start enrichment never shuts off |
| Milky oil or water in the crankcase | Cold running, condensation not burned off |
| Overheat alarm within minutes of launch | Thermostat stuck closed |
| Tell tale strong but block still hot | Thermostat closed, water bypassing |
| Temperature gauge swings up and down | Thermostat sticking part way open |
Installation Notes
| Step | Action |
|---|---|
| 1 | Disconnect the battery and let the motor cool completely |
| 2 | Drain the block, the thermostat sits above the water line on most models |
| 3 | Remove the housing cover and note the gasket and seal arrangement |
| 4 | Test the old thermostat in a pan of water, it should open near 62 °C |
| 5 | Clean both mating faces, no gasket scraper marks in the aluminium |
| 6 | Fit the new thermostat with the spring towards the hot side |
| 7 | Fit a new gasket or O ring, do not reuse the old one |
| 8 | Refill, run on muffs and watch the temperature come up to normal |
What's Included
| Component | Qty |
|---|---|
| Thermostat | 1 |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from Australia
| Destination | Warehouse | Note |
|---|---|---|
| Australia | Australia local warehouse | Domestic delivery, no import duty |
| New Zealand | Australia local warehouse | Short transit, customs may apply |
| Asia Pacific | Australia local warehouse | Tracked air and sea options |
Before You Buy
- Confirm the motor is a Johnson or Evinrude loopcharged V4 or V8, the 85 HP V8 and larger blocks in particular
- Check the number on the old thermostat, 0329766 and 0434137 are the common ones
- Check the model year against the table above
- Test the old thermostat in hot water before ordering a replacement
- Order the housing gasket at the same time if the old one is hard or torn
- Flush the block if the motor has been running cold for a long time
- 30-Day Easy Returns
- Ships from our Australia local warehouse
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