32-33220 Thermostat Housing to Exhaust Hose for MerCruiser & Volvo
32-33220 Thermostat Housing to Exhaust Hose for MerCruiser & Volvo is backordered and will ship as soon as it is back in stock.
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32-33220 Thermostat Housing to Exhaust Hose for MerCruiser & Volvo
32-33220 Thermostat Housing to Exhaust Hose for MerCruiser & Volvo is backordered and will ship as soon as it is back in stock.
Thermostat Housing to Exhaust Manifolds and Elbows Hose
This cooling-system hose connects the thermostat housing to the exhaust manifolds and elbows on matching MerCruiser, Volvo Penta, and OMC Cobra stern drive installations, referenced to primary number 32-33220. It is supplied as the replacement hose only—not a thermostat housing assembly—and is distinct from the larger 1¼-inch inside-diameter hose version referenced under Sierra 18-75125.
Configuration & Specifications
| Connection Route | Thermostat housing to exhaust manifolds and elbows |
|---|---|
| Sierra 18-75100 Reference Specification | Straight 48-inch hose with a 1-inch inside diameter (Sierra reference specification; does not independently confirm the measured dimensions of the supplied hose) |
| Different Configuration Contrast | Sierra 18-75125 is a different straight 48-inch hose version with a 1¼-inch inside diameter; do not select between these versions by length alone |
Engine Applications
Intended for cooling-system installations routing water from the thermostat housing to the exhaust manifolds and elbows across matching stern drive platforms. Do not select this hose by MerCruiser, Volvo Penta, or OMC Cobra brand name alone; verify the original part number, exact engine model, cooling-system hose arrangement, and required inside diameter before ordering.
Application Check Required
- MerCruiser Stern / Out Drive — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number. Confirm application
- Volvo Penta Stern / Out Drive — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number. Confirm application
- OMC Cobra Stern / Out Drive — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number. Confirm application
Reference Numbers
These numbers are provided for part identification only and do not independently confirm interchangeability across all installations or manufacturer identity.
| MerCruiser Stern / Out Drive Reference | 32-33220, 8M0062614, 32-3322070 |
|---|---|
| Mercury Mariner / MerCruiser Reference | 32-8M0062614 |
| OMC Reference | 910305, 912424, 913488 |
| Volvo Penta / OMC Cobra Primary Reference | 0509272, 0910305, 0911945, 0912424, 0913488, 5000354 |
| Aftermarket Reference | Sierra 18-75100; Mallory / Mallory Marine 9-44062; RECMAR REC32-33220 |
| Different Specification Contrast (Not This Item) | Sierra 18-75125 (1¼-inch inside diameter, 48-inch straight hose version; listed for identification distinction only and not a replacement for 18-75100) |
Supplied Parts
- Thermostat housing to exhaust manifolds and elbows hose
Service & Installation Notes
General service guidance only. Use the service manual for your exact engine and exhaust configuration.
- Shut down the engine, allow all cooling and exhaust components to cool completely, and disconnect the battery or disable starting before loosening any cooling-system hose connections.
- Compare the replacement hose against the existing hose between the thermostat housing and the exhaust manifolds or elbows, checking both inside diameter and routing path.
- Clean the hose barb or nipple seating surfaces on the thermostat housing, manifold, or elbow fittings, and inspect for corrosion, pitting, or distortion before fitting the new hose.
- Route the hose without kinks, sharp bends, or contact against hot or moving engine components, and secure the connections according to the engine manufacturer's service manual.
- After reassembly, run the engine only with a proper cooling-water supply and inspect the thermostat housing, manifold, and elbow hose connections for leaks; shut down immediately and inspect if any leakage or abnormal temperature occurs.
Questions Before Replacement
How does Sierra reference 18-75100 differ from 18-75125?
Both Sierra numbers are listed as straight 48-inch hoses, but they have different inside diameters: 18-75100 is listed with a 1-inch inside diameter, while 18-75125 is a 1¼-inch inside-diameter version. Do not choose between them by hose length alone, and note that Sierra reference specifications do not independently confirm the measured dimensions of the supplied hose.
Does this item include the thermostat housing or fittings?
No. This product is the replacement hose connecting the thermostat housing to the exhaust manifolds and elbows, not a thermostat housing assembly.
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