Sierra V-Belt 18-15111, Replaces YSC-10260-10-0C, for V-6 Sterndrive 4.3L/V-8, 5.7L Crank/Power Steering

The Sierra V-Belt 18-15111 is a cogged marine engine belt built for sterndrive applications, specifically the crank/power steering drive on V-6 Sterndrive 4.3L and V-8 5.7L engines. Sierra constructs this belt with high strength synthetic cords that resist shockload failure and hold low stretch properties, so the belt keeps uniform tension and performance over its service life. The compression section uses a special rubber compound engineered to transfer load forces smoothly and evenly from the pulley to the cords, reducing wear at the drive points.

The cogged profile is molded to precise engineering tolerances, which improves the belt's flexibility around smaller pulleys while still maintaining full cord support. The cog geometry also opens up a larger surface area for air circulation, which helps keep the belt cool and prevents damaging heat build-up in the cushion section during continuous operation. Rubber edges along the belt maintain positive, no-slip contact with the pulley grooves for reliable, consistent energy transfer to the crank and power steering pump.

This belt is a direct replacement for OEM part number YSC-10260-10-0C on the specified crank/power steering application. It is sized at 0.39 x 0.39 x 0.39 inches and weighs 0.3 pounds.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-15111
• Product Type: V-Belt
• Application: V-6 Sterndrive 4.3L/V-8, 5.7L (Crank/Power Steering)
• OEM Cross Reference: YSC-10260-10-0C
• Weight: 0.3 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 808282145460
• Construction: Cogged, synthetic cord reinforced rubber

Fitment

• V-6 Sterndrive 4.3L/V-8, 5.7L engines, crank/power steering application

Replaces (OEM)

• YSC-10260-10-0C

Frequently Asked Questions

What engines does the Sierra 18-15111 V-belt fit? The Sierra 18-15111 V-belt is built for the V-6 Sterndrive 4.3L/V-8, 5.7L crank/power steering application.

Is 18-15111 an OEM or aftermarket belt? 18-15111 is a Sierra-manufactured belt made as a direct replacement for OEM part YSC-10260-10-0C, matching the original fit and function for the crank/power steering drive.

What OEM part number does the Sierra 18-15111 replace? It replaces OEM number YSC-10260-10-0C on the V-6 Sterndrive 4.3L/V-8, 5.7L crank/power steering application.

What are the dimensions of this belt? The Sierra 18-15111 V-belt measures 0.39 x 0.39 x 0.39 inches.

How much does the 18-15111 V-belt weigh? This belt weighs 0.3 pounds.

What is the belt made of? Construction is a cogged, synthetic cord reinforced rubber design, with a special rubber compression compound and rubber edges that grip the pulley grooves.

Why does this belt have a cogged design instead of a smooth profile? The cogs on the 18-15111 are molded to precise tolerances so the belt flexes more easily around pulleys while keeping full cord support, and the cog geometry increases air circulation to prevent heat build-up in the cushion section.

Will this belt slip on the pulley over time? No, the rubber edges on the 18-15111 are designed to maintain positive, no-slip contact with the pulley grooves for reliable energy transfer.

Does the belt stretch out after installation? The high strength synthetic cords in the 18-15111 have low stretch properties, so the belt maintains uniform performance rather than loosening over its service life.

What is included when I order part 18-15111? Ordering 18-15111 includes one Sierra V-belt sized for the V-6 Sterndrive 4.3L/V-8, 5.7L crank/power steering application.

Is this the correct belt for the power steering pump drive, or is it for a different pulley? The 18-15111 is specified for the crank/power steering application on the V-6 Sterndrive 4.3L/V-8, 5.7L engine.