Sierra 18-70932 Molded Cooling Hose, Thermostat Cover to Starboard Manifold, Mercruiser 32-871171, MCM/MIE V-8 305 and 350 cid

The Sierra 18-70932 is a molded cooling system hose built to route coolant from the thermostat cover to the starboard manifold on applicable Mercruiser V-8 inboard/outboard engines. It is engineered for fresh water or raw water cooling systems and is molded (rather than bent) so it maintains full, unrestricted water flow through every curve of its shape while also simplifying installation compared to straight hose cut to fit.

Construction is EPDM tubing with a synthetic knit reinforcement layer, giving the hose resistance to heat, engine fluids, and the flexing loads typical of a running marine engine. Sierra molded hoses are built to OEM quality standards, so fit, form, and function match the original equipment hose they replace. The hose is finished in white and is designed as a direct fit for the specified engine applications, with no cutting or forming required at installation.

This hose fits 43L/LX and MCM/MIE V-8 (305 and 350 cid) engines and is specifically the thermostat-cover-to-starboard-manifold routing. It cross-references to Mercruiser part number 32-871171. Because this hose is designated for the starboard side, it is not interchangeable with the port-side hose, which carries its own separate Sierra and Mercruiser part numbers.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-70932
• Product Name: Molded Hose
• Application: Thermostat cover to starboard manifold
• Material: EPDM with synthetic knit reinforcement
• Color: White
• Weight: 0.3 pounds
• Length: 7.5 centimeters
• Package Dimensions: 7.5 L x 34.3 H x 28.2 W centimeters
• UPC: 808282145927
• GTIN: 00808282145927
• Fitment: 43L/LX and MCM/MIE V-8 (305 and 350 cid) engines

Fitment

• Mercruiser 43L/LX engines
• Mercruiser MCM/MIE V-8 (305 and 350 cid) engines

Replaces (OEM)

• Mercruiser 32-871171

Frequently Asked Questions

What engines does the Sierra 18-70932 molded hose fit? The 18-70932 fits Mercruiser 43L/LX and MCM/MIE V-8 (305 and 350 cid) engines, routing coolant from the thermostat cover to the starboard manifold.

Which side of the engine does this hose go on? This hose, Sierra 18-70932, is a starboard-side application, running from the thermostat cover to the starboard manifold; it is not the same part as the port-side hose.

What is the Mercruiser equivalent part number for 18-70932? Sierra 18-70932 cross-references to Mercruiser part number 32-871171.

What material is the 18-70932 hose made from? It is built from EPDM tubing with a synthetic knit reinforcement layer, giving it resistance to heat and engine fluids in a marine cooling system.

How much does the Sierra 18-70932 hose weigh? The 18-70932 molded hose weighs 0.3 pounds.

Is this hose molded or a straight cut length? The 18-70932 is a molded hose, shaped to maintain full water flow through its bends rather than a straight hose that needs to be manually bent or clamped into shape.

What color is the 18-70932 hose? This Sierra molded hose is white.

Will this hose work on both fresh water and raw water cooling systems? Yes, the Sierra 18-70932 molded hose is designed for use on fresh water or raw water cooling systems on inboard/outboard marine engines.

Is the Sierra 18-70932 an OEM-quality replacement? Sierra molded hoses, including the 18-70932, are manufactured to OEM quality standards so fit, form, and function match the original hose being replaced.

What are the package dimensions of the 18-70932 hose? The 18-70932 ships at 7.5 L x 34.3 H x 28.2 W centimeters, with a hose length of 7.5 centimeters.

Does the 18-70932 include any hardware or clamps? The listing includes the molded hose itself (18-70932); hose clamps are not specified as included components.