
18-7985-1 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $19.00 | Condition is New, Sierra 18-7983-1 Fuel Water Separator Kit with Filter 3/8" NPT, shipping cost = $14.95 | 100.0% |
![]() | $98.38 | Condition is New, Sierra 18-7985-1 Fuel Water Separator Kit with Tall Filter, FREE SHIPPING | 100.0% |
![]() | $108.99 | Top Pick! Condition is New, Sierra Filter Kith2O/10M Ss 3/8""Long 18-7985-1, FREE SHIPPING | ![]() |
![]() | $115.80 | Condition is New, Sierra 10 Micron Fuel / Water Separator Kit - 3/8 in. Stainless Steel, Tall, FREE SHIPPING | 98.5% |
![]() | $131.11 | Top Pick! Condition is New, Sierra 18-7985-1 Fuel / Water Separator Kit, shipping cost = $20.90 | 99.1% |
![]() | $171.49 | Condition is New, Sierra 18-7985-1 Fuel Water Separator Kit, FREE SHIPPING | 98.9% |

The Sierra Fuel Water Separator Kit with Part Number 18-7985-1 is a crucial addition to any diesel fuel system that requires effective water separation and filtration. This kit is designed to mitigate the entry and accumulation of water and other contaminants in your fuel system, thus ensuring the longevity and efficient performance of your diesel engine.
Situated at the base of the kit is the 18-inch tall, x 6-inch diameter, primary fuel water separator. This separator, expertly engineered using high-quality materials, utilizes a multi-stage, gravity-fed filtration process to remove water and larger contaminants from the fuel supply before it reaches the engine. This primary separator is equipped with a 10-micron pleated water-discing filter element.
Nestled above the primary separator rests the secondary fuel water separator, which is 15 inches tall and also boasts a 6-inch diameter. This secondary separator includes a spin-on, 5-micron fuel filter to further ensure that only clean fuel reaches the engine. Its integrated water-sensing element on the bowl bottom triggers an alert when water has accumulated.
This kit's design enhances the fuel system's capability to minimize water accumulation and contaminant intrusion, ensuring an uninterrupted flow of clean fuel to the engine. Installing this Sierra Fuel Water Separator Kit with Part Number 18-7985-1 leads to improved fuel economy, enhanced engine performance, and a decrease in engine wear and maintenance costs. Notably, this kit is compatible with various applications, including heavy-duty trucks, off-road equipment, and marine applications, making it a versatile choice for those in need of a reliable fuel water separator and filtration solution.
Pros and Cons of Buying a Sierra 18-7985-1 Fuel Water Separator Kit (Tall Filter) for Diesel Engines
1. Pros:a. Improved Fuel Quality: The Sierra 18-7985-1 Fuel Water Separator Kit is designed to remove water and other contaminants from diesel fuel. This results in improved fuel quality, which can help ensure better engine performance and prolong engine life.
b. Reduced Engine Wear and Damage: Water in fuel can cause corrosion and wear on fuel pumps, injectors, and other engine components. A fuel water separator kit, such as the Sierra 18-7985-1, can help prevent this damage by removing water from the fuel before it reaches the engine.
c. Fuel Economy: By maintaining the engine's fuel system with cleaner fuel, the Sierra 18-7985-1 fuel water separator kit can help improve fuel efficiency and reduce operating costs.
d. Peace of Mind: Having a fuel water separator kit installed provides peace of mind, knowing that your diesel engine's fuel system is being protected from water contamination.
2. Cons:a. Additional Cost: Installing a fuel water separator kit, like the Sierra 18-7985-1, is an additional expense for vehicle maintenance. Although the long-term benefits may outweigh the cost, it is a factor to consider at the time of purchase.
b. Installation Complexity: Depending on your skill level and comfort working on your diesel engine, the installation of a fuel water separator kit may be a complex process. Accordingly, some people may prefer to have a professional install the kit to ensure a successful installation.
Conclusion:Considering the benefits and disadvantages of purchasing a Sierra 18-7985-1 Fuel Water Separator Kit (Tall Filter), the advantages typically outweigh the cons. The improved fuel quality, reduced engine wear, fuel economy, and peace of mind are all valuable advantages to owning and installing a fuel water separator kit on a diesel engine. However, the additional cost and complexity of the installation are factors to consider before making a decision. Ultimately, the investment in a fuel water separator kit can lead to improved performance, longevity, and overall cost savings for your diesel engine.
Recommendation:Based on the pros and cons discussed above, I would recommend purchasing a Sierra 18-7985-1 Fuel Water Separator Kit (Tall Filter) for diesel engines if you are looking for improved fuel quality, reduced engine wear, better fuel economy, and peace of mind. However, it is essential to weigh the additional cost and installation complexity against the potential benefits before making a final decision. If you are unsure about installation or prefer a professional's assistance, consider having a garage or mechanic install the kit for you.
Details:
Be sure to enter an accurate reason and for the return. Pickup is not available. Features, Sierra fuel water separators remove over 99.8% of emulsified from your gasoline. About Sierra.
Prevent damage to sensitive inboard, stern drive and outboard fuel injection systems. Describe the nature of problem and its urgency include pictures if possible.: Sierra 18-7985-1 3/8 fuel water separator kit with tall filter. Items heading outside the USA cannot be used for military or government applications.
Every country is different. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of product against any defects in workmanship and materials. Specifications, material: stainless steel tall filter. Sierra products are engineered to meet or exceed oem standards, and stand up in harsh marine environments.
All filters flow at 90 GP to feed even the hungriest motor. Sierras 10 micron filters are over 90% efficient at removing particles as small. Warranty, defects, damage, and other problems: this item has a limited lifetime warranty covering any manufacturer defects.
specifications inboardfuel:
- brand: Sierra
- mpn: 18-7985-1
- upc: 808282203252
- type: Fuel Water Separator
- material: Stainless Steel
- country of manufacture: China
- item weight: 0 Lbs
seller inboardfuel:
- rating: 100.0%
- city: everett, washington
- # reviews: 39304
shipping inboardfuel:
- transit: 2-7 days
- class: economy, expedited
- service: economy, expedited
- type: fixed
general inboardfuel:
- category: Boat Parts > Inboard Engines Components > Intake Fuel Systems
payments inboardfuel:
- credit card: discover
- other
- wallet: google-pay
offer inboardfuel:
- sold #: 24
- options: ship-to-home
- availability: in stock
- started: january 16, 2025
- in stock #: 5
- prices: $19.00–$171.49
- item condition: New
returns inboardfuel:
- paid by: seller
- time: 60 days
- policy: returns accepted
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