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Sierra 18-7964-1Keeping your boat's Hurth transmission running smoothly starts with fresh, clean fluid flow. Debris and contaminants can build up over time, leading to sluggish shifts, overheating, and costly repairs. This filter kit steps in as a reliable safeguard, capturing particles before they damage internal gears and clutches. Designed for marine enthusiasts who demand performance on the water, it ensures your propulsion system stays responsive during long
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Keeping your boat's Hurth transmission running smoothly starts with fresh, clean fluid flow. Debris and contaminants can build up over time, leading to sluggish shifts, overheating, and costly repairs. This filter kit steps in as a reliable safeguard, capturing particles before they damage internal gears and clutches. Designed for marine enthusiasts who demand performance on the water, it ensures your propulsion system stays responsive during long hauls or weekend cruises.

Whether you're a seasoned captain prepping for the season or a DIY mechanic tackling routine service, swapping out the old filter restores optimal hydraulic pressure and fluid circulation. No more guessing games with worn components— this kit delivers peace of mind with every launch.

Essential Features for Peak Performance

  • High-Efficiency Filtration: Traps microscopic contaminants like metal shavings, dirt, and sludge, protecting bearings, seals, and valve bodies from premature wear.
  • Durable Construction: Built with marine-grade materials that resist corrosion from saltwater exposure and high-pressure operation.
  • Complete Kit: Includes everything needed for a straightforward replacement, minimizing downtime at the dock or in the yard.
  • Optimized Flow Design: Maintains full hydraulic efficiency without restricting fluid movement, ensuring crisp gear engagement even under load.
  • Universal Fit for Hurth Models: Matches the specs of popular marine transmissions, making it a go-to for various vessel setups.

Real-World Benefits for Boaters

Boat owners report noticeably quieter operation and faster warm-ups after installation. By preventing fluid breakdown, it extends transmission life, potentially saving thousands in rebuilds. Ideal for inboards, sterndrives, and auxiliary drives where reliability is non-negotiable.

Perfect Compatibility and Simple Swap

This kit aligns seamlessly with Hurth marine transmissions commonly found in recreational and commercial boats. It replaces OEM filters in models prone to heavy use, like those in fishing charters or pleasure craft. Always cross-check your transmission serial number during routine inspections to confirm fitment.

Step-by-Step Installation Guide

  1. Secure your boat on blocks or in calm waters; warm the transmission fluid for easier drainage.
  2. Locate the filter housing—typically on the side or bottom of the unit—and place a catch pan underneath.
  3. Drain old fluid completely, then unscrew the spin-on filter counterclockwise.
  4. Lubricate the new filter gasket with fresh transmission fluid and hand-tighten plus a quarter-turn.
  5. Refill with manufacturer-recommended fluid, prime the system, and test shifts in neutral before heading out.
  6. Cycle through gears several times on the water to purge air and verify smooth operation.

Most swaps take under an hour with basic tools: wrenches, drain pan, and rags. Pro tip: Inspect seals and magnets during service for extra protection.

Long-Term Maintenance Strategies

Pair this filter kit with a proactive schedule: inspect every 100 hours or annually, whichever comes first. Monitor fluid color and level—dark or burnt-smelling oil signals immediate action. In saltwater environments, rinse the exterior post-use to fend off salt buildup.

For high-hour boats, consider a full flush every two seasons. Track service logs to spot patterns, like increased slippage, early. Clean habits keep resale value high and adventures uninterrupted.

Frequently Asked Questions

What transmissions does this filter kit fit?

It's engineered for Hurth marine transmissions, including popular models in recreational boats. Verify your unit's specs for exact compatibility.

How often should I replace the transmission filter?

Aim for every 100 operating hours or once a year, especially in demanding conditions like towing or saltwater use.

Can I install this kit myself?

Yes, it's DIY-friendly with standard tools. Follow the steps above, and take it slow to avoid leaks.

What fluid should I use with this filter?

Stick to ATF or the specific type recommended by your transmission manual for best results.

Does this kit include seals or gaskets?

The kit focuses on the primary filter element, but check for any included O-rings to complete the service.

Will this improve shifting performance?

Absolutely—clean filtration reduces drag and ensures precise hydraulic control for smoother gear changes.

Is it safe for use in saltwater boats?

Yes, corrosion-resistant materials make it suitable for marine environments, but rinse regularly.

FILTER KIT-HURTH TRANSMISSION


SKU: NVN-4004253
MPN: 18-7964-1
UPC: 808282374587

Sierra 18-7964-1

Item no : 332050762
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US$ 116.09
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