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Sierra 18-79901 Yamaha VST Fuel Filter for Outboard Engines

Manufacturer

Sierra

<h3>Sierra: Six Decades of Marine Aftermarket Excellence</h3><p><strong>Sierra</strong> has spent nearly 60 years earning its reputation as one of the most trusted names in the marine aftermarket industry. Originally focused on engine and drive components for boats, the brand has grown into a comprehensive source for nearly everything a boater needs to keep their vessel running at its best — from precision instrumentation to complete engine rebuild hardware.</p><p>Now operating as a brand of Dometic, Sierra manages global aftermarket distribution from a 300,000 sq. ft. facility in Litchfield, Illinois. The Sierra brand today encompasses not only its flagship marine parts line but also well-established marine names like Shields and Moeller, offering boaters a broader catalog than ever before. Whether you own an outboard, inboard, or sterndrive, Sierra's engineering team designs products to meet or exceed OEM specifications.</p><h3>Precision Instrumentation You Can Trust on the Water</h3><p>One of Sierra's most recognized product areas is its marine instrumentation lineup. The brand's <a href="/7570-sierra-gauge-set-1480">gauge sets</a> cover everything from classic analog instrument clusters to advanced digital multi-function displays. Sierra offers packages suited to outboards, sterndrives, and gasoline-powered inboards, with options ranging from coordinated analog kits in styles like Arctic, Eclipse, and Amega to modern touchscreen solutions like the R3 multi-function gauge. Features such as scratch-resistant domed glass lenses, silicone-dampened pointers, and perimeter backlighting make these instruments highly readable in all conditions.</p><p>Behind every accurate gauge reading is a properly calibrated sending circuit. Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> are a critical part of that chain, ensuring the signals from sensors and sending units are correctly interpreted by your instruments. These components are built to marine-grade standards to resist moisture, vibration, and corrosion — the realities of life on the water.</p><h3>Engine Internals Built to OEM Standards</h3><p>Sierra's history in marine power is perhaps best demonstrated by its deep catalog of engine components. The brand's <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> cover a wide range of outboard and inboard applications and are engineered to deliver reliable seals in the demanding thermal and chemical environment of a marine engine. For boaters performing seasonal overhauls, top-end rebuilds, or full engine restorations, Sierra gasket kits are a go-to resource trusted by professional marine technicians and DIY boaters alike.</p><h3>A Complete Marine Parts Partner</h3><p>Beyond instrumentation and engine internals, Sierra's catalog spans fuel systems, electrical supplies, steering components, shore power, and more — all covered by what the brand calls an industry-leading warranty. Sierra also maintains a comprehensive parts-finder tool that enables cross-referencing with OEM part numbers from major manufacturers including Mercury, Yamaha, Suzuki, Volvo Penta, and others, making it straightforward to find the right replacement part for virtually any application.</p>

Part Number

18-79901
09/12/2036 8:22 AM
Sale Price

$97.91

In Stock (10)

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Usually delivered within 2 days

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Product Details

The Sierra 18-79901 is a replacement Vapor Separator Tank (VST) fuel filter designed specifically for Yamaha outboard engines. This critical fuel system component filters out debris and contaminants before fuel enters the engine, ensuring optimal performance and engine longevity.

Key Features:

  • Direct replacement for Yamaha OEM part number 65L-13915-00-00
  • Also replaces Mallory 9-37968
  • Manufactured by Sierra to meet or exceed OEM specifications
  • Filters fuel just before it's pressurized into the fuel injection rails
  • Essential protection against fuel system deposits and blockages

Compatible with Yamaha Outboard Models:

  • L225 (1997-1998)
  • L250 (1997-1998)
  • S225 (1997-1998)
  • S250 (1997-1998)
  • V200 (1998)
  • V225 (1998)

The VST filter is located in a critical position where deposits and gum can form, particularly with untreated fuel. Regular replacement of this filter is essential for maintaining your Yamaha outboard's fuel system health. Yamaha recommends replacement after every 300 hours of engine operation when other filters have been properly maintained and treated fuel is used.

This Sierra replacement filter provides reliable filtration performance to protect your fuel injectors and ensure smooth engine operation. Quality fuel filtration prevents poor acceleration, rough idling, and stalling issues that can result from contaminated fuel.

Products specifications

Application

L225(1997-98), S225(1997-98), L250(1997-98), S250(1997-98), V200(1998), V225(1998)

OEM Number

66L-13915-00-00

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