
18-7946 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $6.99 | Condition is New, 18-7946-SIERRA OMC/CRU FL WTR FLTR 10M, shipping cost = $8.00 | 99.2% |
![]() | $10.90 | Condition is New, Sierra 18-7946 JOHNSON/ EVINRUDE WATER SEPARATING FILTER (502905), shipping cost = $4.50 | 97.6% |
![]() | $14.99 | Condition is New, 18-7946 Sierra Spin On Fuel Filter, FREE SHIPPING | 100.0% |
![]() | $9.99 | Condition is New, Sierra 18-7946 Johnson/Evinrude Fuel Water Separator Filter, shipping cost = $7.02 | 99.4% |
![]() | $16.59 | Condition is New, 18-7946 Sierra Spin On Fuel Filter, FREE SHIPPING | 98.8% |
![]() | $9.99 | Condition is New, Sierra Marine 18-7946 10 Micron Replacement Filter, shipping cost = $8.00 | 99.8% |
![]() | $17.05 | Condition is New, Sierra 18-7946 Fuel/Water Separator Filter Replaces Crusader 98041, OMC 502905, FREE SHIPPING | ![]() |
![]() | $17.89 | Condition is New, Genuine MC Durmon Distribution 18-7946 Fuel/water separating filter - sierra m, FREE SHIPPING | 100.0% |
![]() | $8.00 | Condition is New, Sierra 18-7946 Fuel Water Separator Filter, shipping cost = $11.95 | 100.0% |
![]() | $10.00 | Condition is New, Sierra 18-7946 Fuel Water Separator Filter, shipping cost = $9.42 | 100.0% |
![]() | $19.99 | Top Pick! Condition is New, Sierra Filter-Water Sep Omc 10M 18-7946, FREE SHIPPING | ![]() |
![]() | $15.00 | Condition is New, 18-7946 Sierra Spin On Fuel Filter, shipping cost = $5.00 | 100.0% |
![]() | $20.19 | Top Pick! Condition is New, Sierra International 18-7946, Fuel Water Separator Filter, FREE SHIPPING | 99.2% |
![]() | $20.68 | Condition is New, Sierra 18-7946 Marine Fuel Water Separator Filter, FREE SHIPPING | 100.0% |
![]() | $20.90 | Condition is New, Sierra Fuel Water Separator Filter, 10 Micron, 18-7946, FREE SHIPPING | 99.9% |
![]() | $22.00 | Condition is New, Sierra International Fuel Water Separator Filter 18-7946, FREE SHIPPING | 99.1% |
![]() | $22.28 | Condition is New, SIERRA 18-7946 OMC/CRU FL WTR FLTR 10M, FREE SHIPPING | 99.4% |
![]() | $7.69 | Top Pick! Condition is New, NEW SIERRA 18-7946 Fuel Water Separating Filter, shipping cost = $17.56 | ![]() |
![]() | $11.99 | Condition is New, Sierra 18-7946 OMC Fuel Filter 10 Micron 502905, shipping cost = $13.00 | 100.0% |
![]() | $20.00 | Condition is New, Sierra Fuel/ Water Separating Filter 18-7946 Replaces OMC 502905, shipping cost = $4.95 | ![]() |
![]() | $24.07 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter, FREE SHIPPING | 98.9% |
![]() | $24.83 | Condition is New, Sierra Marine 18-7946 Marine Series MARINE FUEL WATER SEPERATOR, FREE SHIPPING | ![]() |
![]() | $10.00 | Condition is New, Sierra 18-7946 Fuel Water Separator Filter, shipping cost = $15.10 | 100.0% |
![]() | $11.30 | Top Pick! Condition is New, Sierra Fuel Water Separator Filter #18-7946, shipping cost = $14.10 | 99.5% |
![]() | $11.88 | Top Pick! Condition is New, Sierra Fuel Water Separator Filter #18-7946, shipping cost = $14.10 | 100.0% |
![]() | $16.45 | Condition is New, Sierra Filter-Water Sep OMC 10 Micron - Large Hole. (18-7946), shipping cost = $9.99 | 99.5% |
![]() | $19.99 | Condition is New, Sierra Johnsonn/Evinrude EMP OMC Fuel Water Separator Filter 10 Micron 18-7946, shipping cost = $6.81 | 100.0% |
![]() | $25.41 | Condition is New, Sierra International 18-7946, Fuel Water Separator Filter, FREE SHIPPING | 99.5% |
![]() | $25.81 | Condition is New, Sierra 18-7946 Fuel Water Separating Filter for OMC - 10 Micron, FREE SHIPPING | 99.4% |
![]() | $15.00 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter #4, shipping cost = $11.95 | 99.5% |
![]() | $15.00 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter #3, shipping cost = $11.95 | 99.5% |
![]() | $15.00 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter #5, shipping cost = $11.95 | 99.5% |
![]() | $15.00 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter #2, shipping cost = $11.95 | 99.5% |
![]() | $15.00 | Condition is New, Sierra International 18-7946 Fuel Water Separator Filter #1, shipping cost = $11.95 | 99.5% |
![]() | $17.08 | Top Pick! Condition is New, Sierra 18-7946 Fuel Water Filter 10 Micron Replaces 47-7946, shipping cost = $9.34 | 100.0% |
![]() | $19.99 | Condition is New, Sierra 10 Micron Fuel Water Separator Filter Johnson EMP Mallory Suzuki 18-7896, shipping cost = $7.12 | 100.0% |
![]() | $12.99 | Condition is New, 18-7946 Sierra Spin On Fuel / Water Separating Filter NEW in Box, shipping cost = $16.45 | 99.5% |
![]() | $17.32 | Condition is New, Sierra 18-7946 OMC Fuel Filter 10 Micron 502905, shipping cost = $12.95 | 100.0% |
![]() | $10.00 | Condition is New, Sierra 18-7946 OMC Fuel/Water Separating Filter, shipping cost = $25.28 | 99.2% |
![]() | $39.14 | Condition is New, Sierra Marine 18-7946 Water Separating Fuel Filter Genuine - 2 PACK, FREE SHIPPING | ![]() |
![]() | $50.06 | Top Pick! Condition is New, OMC REPLACEMENT FUEL/WATER SEPARATING FILTER (SIERRA) 18-7946, FREE SHIPPING | 98.2% |
![]() | $52.18 | Condition is New, Sierra Marine 18-7946 Water Separating Fuel Filter Genuine - 3 PACK, FREE SHIPPING | ![]() |
![]() | $65.99 | Condition is New, Sierra Fuel Water Separator Filter OMC 4 Pack 18-7946, shipping cost = $15.60 | 89.5% |
![]() | $68.99 | Condition is New, 5 X Sierra 18-7946 Fuel Water Separator Filter, shipping cost = $15.60 | 89.5% |
![]() | $150.35 | Condition is New, Sierra Marine 18-7946 10 Micron Replacement Filter, CASE OF 12, FREE SHIPPING | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $18.99 | Condition is New other (see details), Sierra Fuel/Water Separating Filter 18-7946 Replacement For Crusader/OMC, FREE SHIPPING | ![]() |
![]() | $9.95 | Condition is New other (see details), Sierra 18-7946, Fuel Filter For OMC, shipping cost = $10.50 | 100.0% |
![]() | $10.00 | Condition is New other (see details), Sierra 18-7946 Fuel Water Separator Filter, shipping cost = $10.01 | 100.0% |
![]() | $36.00 | Condition is New other (see details), LOT OF 5, NEW SIERRA HIGH PERF FUEL/WATER SEPARATING FILTER, 18-7946, KWR1634, shipping cost = $16.00 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $22.99 | Condition is Used, Sierra 18-7946 Fuel Water Separator Filter 90GPH 10 Micron Marine EFI DFI Engine, FREE SHIPPING | 99.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $41.35 | Top Pick! Condition is Nuovo, Sierra 118-7946 Fuel Filter, shipping cost = $28.29 | 99.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $39.16 | Top Pick! Condition is Neu, Fuel Filter Sierra 118-7946, shipping cost = $30.65 | 99.7% |

The Sierra 18-7946 Fuel Water Separating Filter is a crucial component in ensuring the optimal performance and longevity of your diesel engine. This high-quality filter is designed to separate water and other contaminants from fuel before it reaches the engine, preventing potential damage caused by water in fuel.
The filter housing is constructed of durable, corrosion-resistant materials, ensuring a long service life even in harsh environments. The filter element is made of pleated paper media, providing a large filtering surface area to capture even the smallest water droplets and contaminants. The filter element has a micron rating of 10 microns, ensuring effective separation of water and other impurities.
The Sierra 18-7946 Fuel Water Separating Filter features a clear bowl for easy inspection of the water collected. The bowl has a capacity of 2.5 gallons, allowing for regular monitoring of the accumulated water. The filter comes with a drain plug, making it easy to drain the collected water.
The filter is suitable for use with both diesel fuel and biodiesel, making it a versatile option for a variety of applications. It is designed to meet the requirements of OEM specifications for fuel water separators and is compatible with most diesel engines.
The Sierra 18-7946 Fuel Water Separating Filter is easy to install and maintain. It is designed to be used in-line with the fuel system and can be installed in a horizontal or vertical position. The filter comes with all necessary hardware for installation and includes a bypass valve for easy maintenance.
Overall, the Sierra 18-7946 Fuel Water Separating Filter is an essential tool for maintaining the health and longevity of your diesel engine. Its durable construction, effective filtration, and easy maintenance make it a top choice for professionals and DIY enthusiasts alike.
The Sierra 18-7946 Fuel Water Separating Filter is a commonly used diesel fuel filtration system. Although it has several advantages, there are also some potential drawbacks to consider before making a purchase. Here are the pros and cons:
Pros:1. Effective in Removing Water and Particulates: The Sierra 18-7946 filter is designed to remove water and solid particles from diesel fuel, ensuring that the fuel system remains free from contaminants that can cause damage.
2. Easy Installation: This filter is relatively easy to install, requiring minimal tools and plumbing skills. It can be installed in-line with the fuel system, making it a convenient solution for maintaining fuel quality.
3. Long Filter Life: The Sierra 18-7946 filter has a long service life, with some users reporting that they only need to change the filter every 5,000 to 10,000 hours of operation.
4. Improves Fuel Economy: By keeping the fuel system free from water and contaminants, the Sierra 18-7946 filter can help improve fuel economy by ensuring that the engine is operating efficiently.
5. Prevents Engine Damage: Contaminated fuel can cause significant damage to engine components. By removing water and solid particles, the filter helps prevent costly repairs and downtime.
Cons:1. Cost: The Sierra 18-7946 filter can be more expensive than some other fuel filtration systems on the market. However, its long filter life and effectiveness in removing contaminants may make it a worthwhile investment for those who rely on diesel fuel for their operations.
2. Maintenance: While the filter itself requires infrequent maintenance, it is important to regularly check the filtration system for leaks and ensure that the filter is clean and functioning properly.
3. Size: The Sierra 18-7946 filter is relatively large, which may make it difficult to install in tight spaces or on smaller vehicles.
4. May Not Remove All Contaminants: While the filter is effective in removing water and solid particles, it may not remove all contaminants from the fuel. Other filtration systems, such as those that use coalescing media, may be more effective at removing smaller contaminants.
Conclusion:The Sierra 18-7946 Fuel Water Separating Filter is an effective solution for removing water and solid particles from diesel fuel, improving fuel economy, and preventing engine damage. While it may be more expensive than some other filtration systems and require occasional maintenance, its long filter life and ease of installation make it a worthwhile investment for those who rely heavily on diesel fuel for their operations.
Recommendation:If you operate a diesel engine and want to ensure that your fuel system remains free from contaminants, the Sierra 18-7946 Fuel Water Separating Filter is a solid choice. Its effectiveness in removing water and solid particles, long filter life, and ease of installation make it a worthwhile investment for those who prioritize fuel quality and engine performance. However, it may not be the most cost-effective option for those with smaller budgets or limited space for installation.
Details:
Shipping charges listed above apply to the contiguous USA only. All filters flow 90 GP to feed even the hungriest motor. Sierras 10 micron filters are over 90% efficient at removing particles as small. Please verify your junk/bulk mail folder as our e-mail reply may end up in there.
You can also leave us a message. Satisfaction guaranteed: before opening a request.: kit: no. Product must be in original package with tags, and new re-saleable condition.
10 micron, Sierra fuel water separators remove over 99.8% of emulsified from your gasoline. Number: 18-7946.
specifications inboardfuel:
- brand: Sierra
- mpn: 18-7946
- type: Fuel Water Separators
- upc: 808282201876
seller inboardfuel:
- city: champlain, new york
- # reviews: 87643
- rating: 98.8%
general inboardfuel:
- category: Boat Parts > Inboard Engines Components > Intake Fuel Systems
offer inboardfuel:
- availability: in stock
- in stock #: 5
- sold #: 20
- started: march 16, 2025
- options: ship-to-home
- prices: $6.99–$150.35
- item condition:
- New
- New other (see details)
- Used
- Nuovo
- Neu
payments inboardfuel:
- credit card: mastercard
- other
- wallet: google-pay
shipping inboardfuel:
- transit: 4-8 days
- type: fixed
- class: standard
- service: standard
returns inboardfuel:
- paid by: seller
- time: 30 days
- policy: returns accepted
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