PREPARE FOR WINTER: 10-50% discount on all OEM parts!

Unless prohibited by manufacturer. Does not include aftermarket or Crowley Marine branded products. Priced as marked.

Honoring all who served: veterans, active military and first responders save 5% on OEM parts all year round. Our warehouses and customer support are open on Veterans Day, November 11th.

Contact Us

My Account

Search Over 1 Million OEM Parts

Easy-to-use  parts diagrams Best price  guarantee Expert  live support 50+ years  of serving boaters Huge selection of OEM parts  -  from 1950 to 2026 Most parts in stock  -  Same day fulfillment

Most parts in stock- Same day fulfillment

Where is my model number?

Mercury Marine

Thermostat Cover Gasket 488181

$2.69 ~~$2.99~~

You save $0.30 (10%)

Cross ship

Guaranteed fitment for 21 different models

This is an OEM part manufactured by Mercury Marine

30 day return policy

Product Description

Mercury factory part. Search for more factory parts & parts diagrams.

Our verified social media accounts

Beware of impersonators

Refresh

Refresh

Customers Also purchased

WATER EXHAUST SEPARATOR STERN DRIVE Shutter

~~$40.58~~

You save $2.84 (7%)

$37.74

Distributor Cap

~~$61.83~~

You save $4.33 (7%)

$57.50

Retainer

~~$20.58~~

You save $1.44 (7%)

$19.14

Thermostat (140 Degrees)

~~$26.58~~

You save $1.86 (7%)

$24.72

Plate

~~$19.5~~

You save $1.36 (7%)

$18.14

Exhaust Manifold Body To Cylinder Head Gasket

~~$13.7~~

You save $0.96 (7%)

$12.74

Thermostat Housing Sleeve

~~$19.34~~

You save $1.35 (7%)

$17.99

Impeller

~~$44.95~~

You save $3.15 (7%)

$41.80

Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.