Skip to navigation Skip to content

Brisbane Marine – The Home of Boating in Queensland

Shop
- Shop by Category
- Shop by Brand
Engines
Trolling Motors
Inflatables
Trailers
Mercury Parts
Service
More

Shop
- Shop by Category
- Shop by Brand
Engines
Trolling Motors
Inflatables
Trailers
Mercury Parts
Service
More

Parts 07 3889 3033

Email parts@brismarine.com.au

Shop Categories

Mercury Parts & Accessories
MerCruiser Parts & Accessories
Oils, Sealants & Maintenance
Quintrex Parts & Accessories
Marine Electronics & Accessories
Marine Batteries & Chargers
Props and Prop Hardware
Bimini’s, Canopies & Boat Covers
Outboard Covers
Trailer Parts & Accessories
Safety Equipment
Clearance

Search for:

Returning Customer ?

Sign in

Don't have an account ?

Register

- × Ark Slimline LED Trailer Light Set - Submersible 1 × $129.90
- × Sierra Adjusting Needle Retainer - Johnson/Evinrude 1 × $25.90
- × Wiring Loom - Suits Minn Kota 1 × $369.90
Subtotal: $525.70

View cart Checkout

Shop
- Shop by Category
- Shop by Brand
Engines
Trolling Motors
Inflatables
Trailers
Mercury Parts
Service
More

Search

Search for:
3

Search for:

Shop HomeEngine & Gearbox OilsSierra Thermostat -Mercury/Mariner

Sierra Thermostat -Mercury/Mariner

Engine & Gearbox Oils

Sierra Thermostat -Mercury/Mariner

SKU: S18-3638 Category: Engine & Gearbox Oils

Add to wishlist

$129.90

Quantity:

Sierra Thermostat -Mercury/Mariner quantity

Add to wishlist

Description

Replaces 804540
Fits 2.5-3.5HP (0R131842 & Up), 4-6HP (0R411838 & Up)

SKU: S18-3638 Category: Engine & Gearbox Oils

Related products

Engine & Gearbox Oils
Sierra Momentary Push Switch
Engine & Gearbox Oils
Sierra Momentary Push Switch

0 out of 5
(0)

SKU: SMP39160
$66.90
Add to cart

Add to wishlist

Compare
Engine & Gearbox Oils
Sierra E-Go! Adapter
Engine & Gearbox Oils
Sierra E-Go! Adapter

0 out of 5
(0)

SKU: S18-8610
$109.90
Add to cart

Add to wishlist

Compare
Engine & Gearbox Oils
Sierra Hose Pinch-Off Pliers
Engine & Gearbox Oils
Sierra Hose Pinch-Off Pliers

0 out of 5
(0)

SKU: S18-9898
$96.90
Add to cart

Add to wishlist

Compare
Engine & Gearbox Oils
Quicksilver Measuring Cup – With Cap
Engine & Gearbox Oils
Quicksilver Measuring Cup – With Cap

0 out of 5
(0)

SKU: Q67886696
$5.90
Add to cart

Add to wishlist

Compare
Engine & Gearbox Oils
Sierra Marine Ignition Switch
Engine & Gearbox Oils
Sierra Marine Ignition Switch

0 out of 5
(0)

SKU: SMP51090
$129.90
Add to cart

Add to wishlist

Compare

Got Questions? Call us today. 07 3889 3033

Contact Information

306 Duffield Road, Clontarf, QLD, 4019, Australia

EMAIL SUPPORT

sales@brismarine.com.au partsonline@brismarine.com.au service@brismarine.com.au

HELP

Cart
Frequently Asked Questions
Returns & Exchanges
Terms & Conditions
Privacy Policy
Contact Us

OFFICE HOURS

Mon-Fri: 8:00am - 4:30pm
Saturday: 8:00am - 11:00am
Sunday: CLOSED
Public Holidays: CLOSED

Copyright © 2025 Brisbane Marine | The Home of Boating in Queensland! - All Rights Reserved.

EMAIL SUPPORT

sales@brismarine.com.au partsonline@brismarine.com.au service@brismarine.com.au

HELP

Cart
Frequently Asked Questions
Returns & Exchanges
Terms & Conditions
Privacy Policy
Contact Us

OFFICE HOURS

Mon-Fri: 8:00am - 4:30pm
Saturday: 8:00am - 11:00am
Sunday: CLOSED
Public Holidays: CLOSED

Got Questions? Call us today. 07 3889 3033

SHOPPING CART

close

Select at least 2 products
to compare

View comparison