Thermostat 0436195 436195 0777837 18-3561 13150 143F 62C for Johnson Evinrude 70 120 130 135 140 250 300 HP Outboard Cooling — Australia Local Warehouse
Thermostat 0436195 436195 0777837 18-3561 13150 143F 62C for Johnson Evinrude 70 120 130 135 140 250 300 HP Outboard Cooling — Australia Local Warehouse
Product Overview
143 °F / 62 °C thermostat for Johnson and Evinrude outboards, a cooling system part that replaces 436195, 0436195 and 0777837 and crosses to Sierra 18-3561 and GLM 13150. One thermostat is supplied. Shipped from our Australia local warehouse.
Sixty two degrees Celsius is the cold rating these motors were set up for. Fitting a hotter automotive thermostat makes them run lean and carbon up, and fitting one that opens early keeps them cold and thirsty.
It is the unit listed in the 70-300 HP parts group and the same thermostat also serves the small twins and triples from 5 HP up to 70 HP. Check the number and the rating on the old thermostat, because the four stroke range uses a different one.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Outboard thermostat |
| Opening Temperature | 143 °F |
| Opening Temperature | 62 °C |
| Application | Johnson and Evinrude outboards from 5 HP to 300 HP |
| Quantity | 1 thermostat |
| Country of Origin | Taiwan |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Johnson / Evinrude | 436195, 0436195 |
| Johnson / Evinrude | 0777837 |
| Johnson / Evinrude | 394411, 0394411 |
| Johnson / Evinrude | 434671, 0434671 |
| Sierra | 18-3561 |
| Mallory | 9-43023 |
| GLM | 13150 |
Compatible Engines
| Horsepower | Years |
|---|---|
| 5 HP | 1998 to 2001 |
| 6 HP | 1998 to 2004 |
| 9.9 HP | 1996 to 2007 |
| 10 HP | 10HP to 140HP models, vernatherm housing |
| 15 HP | 1996 to 2007 |
| 25 HP | 1996 to 2001 |
| 30 HP | 1999 to 2001 |
| 45 HP | 1996 to 2001 |
| 48 HP | 1995 to 1996 |
| 50 HP | 1995 to 2005 |
| 60 HP | 1993 to 2001 |
| 70 HP | 1993 to 2001 |
| 120 HP | 1993 to 1994 |
| 130 HP | 1995 to 2000 |
| 135 HP | 2001 |
| 140 HP | 1993 to 1994 |
| 250 HP | 1994 to 1995 |
| 300 HP | 1994 to 1995 |
What's Included
| Component | Reference | Qty |
|---|---|---|
| Thermostat, 143 °F / 62 °C | 0436195 pattern | 1 |
Stuck Open or Stuck Closed
| What the Motor Does | Which Way It Failed | What Else To Check |
|---|---|---|
| Never reaches normal temperature, runs rich | Stuck open | Thermostat, then the sender and gauge |
| Overheats at speed, cools at idle | Stuck closed or half open | Thermostat and the water pump impeller |
| Temperature swings up and down | Opening late and snapping shut | Thermostat, plus the bypass valve |
| Cold at idle, hot on plane | Thermostat passing, pump weak | Renew both the thermostat and the impeller |
| Overheats only after a lay up | Corrosion holds the valve shut | Thermostat and the housing seal faces |
| Steady temperature all day | Working correctly | Leave it alone, keep the spare |
Why 62 °C and Not an Automotive Part
| If You Fit | What Happens | Result |
|---|---|---|
| 82 °C automotive thermostat | Motor runs hotter than the ECU and oil were set for | Lean running, carbon, detonation risk |
| Thermostat with no bleed hole | Air locks in the head after a rebuild | Hot spot and a stuck gauge |
| A thermostat rated only in °F | Cross check 143 °F equals 62 °C | Wrong part if the numbers do not match |
| No thermostat at all | Motor never reaches running temperature | Rich mixture, plug fouling, fuel burn |
| A four stroke thermostat | Different housing and valve | Will not seat in this housing |
| A used thermostat from another motor | Unknown opening point | Overheat or over cool, no way to tell |
Salt Water, Zincs and the Housing
| Australian Use | Effect on the Part | What To Do |
|---|---|---|
| Salt water boat | Pitting on the housing seal faces | Check the faces each time the thermostat is out |
| Motor flushed irregularly | Salt scale jams the valve open | Flush after every trip |
| Warm northern water | Motor runs near the top of its range anyway | Renew on schedule, not on symptoms |
| Anodes left too long | Corrosion moves to the alloy housing | Renew the anodes with the thermostat |
| Long idle in shallow water | Silt packs around the housing | Flush and check the telltale |
| Boat ashore in the dry season | Rubber seal dries and hardens | Renew the thermostat before the season |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the rating and the number on the old thermostat, 143 °F is 62 °C |
| 2 | Check the housing and the cover seal faces for corrosion pitting |
| 3 | Check the impeller at the same service, overheating is often the pump and not the thermostat |
| 4 | Fit the thermostat the right way round, spring end toward the hot side |
| 5 | Seat the gasket dry and tighten the cover evenly, not corner to corner |
| 6 | Run on muffs and watch the head temperature climb and then hold |
| 7 | Check the telltale and the cover joint for weeps after the first run |
| 8 | Recheck the cover bolts when the motor is cold |
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 |
| Pacific islands | Australia local warehouse | Tracked shipping available |
Before You Buy
- Check the rating on the old thermostat, this one opens at 143 °F and 62 °C
- Check the housing and cover for corrosion pitting on the seal faces
- Check the impeller at the same service
- Fit the thermostat with the spring end toward the hot side
- This is one thermostat, the gasket and housing are not included
- Run on muffs and watch the temperature hold before launching
- 30-Day Easy Returns
- Ships from our Australia local warehouse
Couldn't load pickup availability
Out of stock
View full details
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.
What payment methods do you accept?
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.