Housing Thermostat Housing Stainless Steel GM Mercruiser Complete Sierra 18-1989
$310.00
Competitor Price:
$343.69
Stainless thermostat housing fits various Mercruiser GM 4.3L, 5.7L, 7.4L and 8.2L marine engines
- Fits various Mercruiser GM 4.3L, 5.7L, 7.4L and 8.2L applications
- Stainless steel construction
- Includes inserts, pipe plugs & thermostat gasket
- Uses Sierra 18-1989K gasket service kit
- Replaces Mercury 87290A4, 8M0061381, & 861006A1
Most in-stock orders ship within 24 hours. Orders placed by 1:00 PM EST typically ship the same business day, subject to availability.
Average delivery time within the Continental U.S. is 3–7 business days.
Expedited shipping options are available on select products. Weekend delivery is not available.
Oversized items, drop-shipped products, and shipments to Alaska, Hawaii, or international destinations may require additional time or shipping costs.
Tracking information is emailed once your order ships.