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MPI Type A Low-Permeation Marine Fuel Hose
MPI 5/16" Type A Marine Fuel Hose - Sold by the Foot
The MPI 313-1 5/16" Type A Marine Fuel Hose is a low-permeation bulk fuel line for marine installations requiring the additional fire-resistant protection associated with USCG Type A fuel hose.
This hose is a strong choice for enclosed, below-deck and other installations where Type A hose is required. It is sold by the foot so you can purchase the exact length needed for the boat.
Pro Marine also stocks the correct Oetiker 4-170 ear clamp, a compatible 5/16" primer bulb, clamp installation tools and alternate 5/16" fuel-hose options.
Inside Diameter: 5/16"
Manufacturer: MPI Products
Fuel Hose Type: Type A Marine Fuel Hose
Construction: Low Permeation
Sold: By the Foot
Recommended Clamp: Oetiker 4-170
Recommended Primer Bulb: Pro Marine 8004 - 5/16"
How to Order Bulk Fuel Hose
This hose is sold by the foot. Enter the quantity based on the total continuous length needed for your installation.
For example, if you need 10 feet of hose, order a quantity of 10.
What Does Type A Marine Fuel Hose Mean?
Marine fuel hose is classified according to its intended fuel-system use, permeation performance and fire-resistance requirements.
Type A hose meets the applicable marine fuel-hose performance standard and also meets the additional USCG fire-test requirement. This makes Type A hose the appropriate choice in marine installations where additional fire resistance is required.
Type A1 vs. Type A2
| Classification | General Application | Permeation Class |
|---|---|---|
| Type A1 | Fuel-feed hose, including tank-to-engine applications where Type A hose is required | Lower permeation |
| Type A2 | Certain fuel-fill and vent applications | Higher permitted permeation than Class 1 |
For marine fuel-feed hose between the fuel tank and engine, federal requirements specifically identify USCG Type A1 as the Type A fuel-feed classification.
Always confirm the exact hose marking and requirements for your particular fuel-system installation before ordering.
When Should You Choose Type A Fuel Hose?
Type A fuel hose is generally selected when the fuel line is routed through an area where the installation requires the additional USCG fire-resistant hose classification.
This commonly includes many enclosed or below-deck installations, as well as other fuel-system layouts where Type A hose is specified by the boat builder, engine manufacturer or applicable regulation.
Complete Your 5/16" Fuel Line Setup
Oetiker 4-170 Ear Clamp - 10 Pack
Matching Oetiker ear clamp for the MPI 313-1 5/16" Type A marine fuel hose.
View Oetiker 4-170 Clamp
Pro Marine 8004 - 5/16" Primer Bulb
5/16" primer bulb for compatible outboard fuel-line assemblies using 5/16" fuel hose.
View 5/16" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Pincer tool for properly closing Oetiker ear clamps during marine fuel-line installation.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Complete assortment of commonly used marine Oetiker clamp sizes with the installation tool included.
View Oetiker Clamp PackOther 5/16" Fuel Hose Options
MPI 5/16" Type B1/B2 Fuel Hose - 315-056
Type B alternative for exposed and above-deck installations where Type B hose is permitted.
Matching Clamp: Oetiker 4-153
View 5/16" Type B Fuel Hose
Mercury OEM 5/16" Silver Fuel Hose
Genuine Mercury Marine 5/16" bulk fuel hose for compatible Mercury outboard fuel-line applications.
Matching Clamp: Oetiker 4-145
View Mercury OEM Fuel Hose5/16" Fuel Hose Comparison
| Fuel Hose | Type | Recommended Clamp |
|---|---|---|
| MPI 313-1 | Type A Low-Permeation | Oetiker 4-170 |
| MPI 315-056 | Type B1/B2 | Oetiker 4-153 |
| Mercury OEM #100 | Mercury Silver Fuel Hose | Oetiker 4-145 |
Why Do Different 5/16" Hoses Use Different Clamps?
The 5/16" measurement describes the hose's inside diameter. It does not tell you the outside diameter.
Type A hose typically has a different construction and wall thickness than Type B or OEM hose, so its outside diameter can be larger even though all of the hoses have the same 5/16" inside diameter.
That is why the MPI 313-1 Type A hose uses the Oetiker 4-170 clamp, while the Type B hose uses 4-153 and the Mercury silver hose uses 4-145.
What This Fuel Hose is Used For
The MPI 313-1 Type A fuel hose is intended for building, repairing or replacing compatible marine fuel lines where a Type A fuel-hose classification is required.
Typical installations may include permanent marine fuel systems, enclosed routing areas and tank-to-engine applications requiring Type A1 fuel-feed hose.
Building a 5/16" Type A Fuel Line
Depending on the installation, a complete setup may require:
- MPI 313-1 5/16" Type A fuel hose
- Oetiker 4-170 ear clamps
- 5/16" primer bulb
- Correct tank-side fitting
- Correct engine-side fitting or connector
- Oetiker pincer installation tool
Key Features & Benefits
- 5/16" inside diameter
- MPI Products marine fuel hose
- Type A marine fuel-hose construction
- Low-permeation design
- Suitable for applications requiring Type A fire resistance
- Common choice for enclosed and below-deck installations
- Sold by the foot
- Matching Oetiker 4-170 clamp available
- Compatible 5/16" primer bulb available
- Type B and Mercury OEM 5/16" alternatives available
Need Help Choosing the Right Marine Fuel Hose?
Selecting the correct fuel hose depends on more than hose diameter. Installation location, fuel-hose classification, permeation rating, fittings, primer bulb and clamp size all matter.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is MPI 313-1?
It has a 5/16" inside diameter.
Is this fuel hose sold by the foot?
Yes. Order the number of feet required for your installation.
What is Type A marine fuel hose?
Type A hose meets the applicable marine fuel-hose performance standard
and the additional USCG fire-test requirement.
Can Type A hose be used below deck?
Type A hose is commonly selected for enclosed and below-deck installations
where the additional fire-resistant classification is required.
What is the difference between Type A1 and A2?
Type A1 is the lower-permeation Type A classification typically used for
fuel-feed applications. Type A2 permits greater permeation and is used
for certain fill and vent applications.
Which clamp fits this hose?
Use the Oetiker 4-170 ear clamp with MPI 313-1.
Which primer bulb fits this hose?
The
Pro Marine 8004 5/16" Primer Bulb
matches the hose size.
What if I need an above-deck Type B fuel hose?
Pro Marine stocks the
MPI 315-056 5/16" Type B1/B2 fuel hose
.
Do you stock Mercury OEM 5/16" fuel hose?
Yes. The
Mercury OEM 5/16" silver fuel hose
is also available by the foot.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help choosing the correct fuel hose?
Contact Pro Marine
Phone: 941-721-3000
Searchable Terms
313-1, MPI 313-1, 5/16 Type A fuel hose, 5/16 marine fuel hose, Type A1 fuel hose, Type A2 fuel hose, low permeation fuel hose, below deck fuel hose, enclosed marine fuel hose, marine fuel line by the foot, bulk marine fuel hose, tank to engine fuel hose, outboard fuel line, boat fuel hose, Oetiker 4-170, 4-170 fuel hose clamp, 5/16 primer bulb, marine primer bulb, Type A marine fuel line, USCG fuel hose
Genuine Mercury Marine Bulk Fuel Hose
Mercury OEM 5/16" Silver Fuel Hose - Sold by the Foot
This Mercury OEM 5/16" silver fuel hose is a genuine Mercury Marine bulk fuel line for building, repairing or replacing 5/16" fuel-hose assemblies on compatible Mercury outboard applications.
The hose is sold by the foot, allowing you to purchase the length needed for your boat instead of being limited to a preassembled fuel-line length.
Pro Marine also stocks the correct Oetiker 4-145 ear clamp, a compatible 5/16" primer bulb, Oetiker installation tools and alternative marine fuel hose for Type A and Type B applications.
Brand: Mercury Marine
Type: Genuine Mercury OEM Fuel Hose
Inside Diameter: 5/16"
Color: Silver
Sold: By the Foot
Recommended Clamp: Oetiker 4-145
Recommended Primer Bulb: Pro Marine 8004 - 5/16"
How to Order Mercury Bulk Fuel Hose
This Mercury fuel hose is sold by the foot. Enter the quantity based on the continuous length of hose needed for your installation.
For example, if you need 6 feet of fuel line, order a quantity of 6.
Genuine Mercury Marine Fuel Hose
This hose is an OEM option for customers who prefer to use Mercury Marine fuel hose when servicing or building a Mercury outboard fuel-line system.
Its 5/16" inside diameter allows it to be paired with compatible 5/16" fuel-system components, including the Pro Marine 8004 primer bulb.
The 5/16" measurement refers to the hose's inside diameter. Different 5/16" fuel hoses can have different wall thicknesses and outside diameters.
This Mercury silver fuel hose uses the Oetiker 4-145 ear clamp. Do not substitute the 4-153 clamp used with our MPI 315-056 5/16" Type B hose simply because both hoses have a 5/16" inside diameter.
Complete Your Mercury 5/16" Fuel Line
Oetiker 4-145 Ear Clamp - 10 Pack
The matching Oetiker ear clamp for this Mercury OEM 5/16" silver fuel hose.
View Oetiker 4-145 Clamp
Pro Marine 8004 - 5/16" Primer Bulb
Compatible 5/16" primer bulb for building or servicing an outboard fuel-line assembly using 5/16" hose.
View 5/16" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Standard-jaw pincer for properly closing Oetiker ear clamps during fuel-line assembly and repair.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
An assortment of commonly used Oetiker clamp sizes with the installation tool included. A convenient option for marine shops, technicians and customers working with multiple fuel-hose sizes.
View Oetiker Clamp PackOther 5/16" Marine Fuel Hose Options
Fuel-hose selection should be based on more than inside diameter. The required hose classification and construction depend on the location and design of the boat's fuel system.
MPI 5/16" Type B1/B2 Fuel Hose
5/16" USCG Type B1/B2 bulk marine fuel hose for exposed and above-deck applications where Type B hose is appropriate.
Matching Clamp: Oetiker 4-153
View 5/16" Type B Fuel Hose
5/16" Type A1/A2 Marine Fuel Hose
5/16" Type A marine fuel hose for installations requiring the additional Type A fire-resistant classification, including applicable enclosed and below-deck fuel-system installations.
View 5/16" Type A Fuel HoseMercury OEM vs. MPI 5/16" Fuel Hose
| Fuel Hose | Inside Diameter | Matching Oetiker Clamp |
|---|---|---|
| Mercury OEM Silver Fuel Hose | 5/16" | 4-145 |
| MPI 315-056 Type B Fuel Hose | 5/16" | 4-153 |
Both hoses have a 5/16" inside diameter, but they do not use the same Oetiker clamp. Always match the clamp to the specific hose being installed.
What This Fuel Hose is Used For
Mercury OEM 5/16" bulk fuel hose can be used when building, replacing or repairing compatible Mercury outboard fuel-line assemblies.
Bulk hose gives boat owners and marine technicians the flexibility to select the required length and combine it with the appropriate primer bulb, fittings, connectors and clamps for the specific installation.
Building a Mercury 5/16" Fuel Line
Depending on the installation, a complete fuel-line setup may require:
- Mercury OEM 5/16" silver fuel hose
- 5/16" primer bulb
- Correct engine-side fitting or fuel connector
- Correct tank-side fitting or connection
- Oetiker 4-145 ear clamps
- Oetiker pincer tool
Key Features & Benefits
- Genuine Mercury Marine fuel hose
- 5/16" inside diameter
- Silver Mercury OEM hose
- Sold by the foot for custom-length installations
- Ideal for building and repairing compatible Mercury fuel lines
- Matching Oetiker 4-145 clamps available
- Compatible 5/16" primer bulb available
- Oetiker installation tool and complete clamp assortment available
- 5/16" Type A and Type B alternative hoses available
Need Help Choosing the Right Marine Fuel Hose?
Choosing the correct marine fuel line depends on hose diameter, installation location, fuel-hose classification, fittings, primer bulb and the outside diameter required for the correct clamp.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is this Mercury fuel hose?
This Mercury fuel hose has a 5/16" inside diameter.
Is this genuine Mercury fuel hose?
Yes. This listing is for genuine Mercury Marine OEM fuel hose.
Is the Mercury hose sold by the foot?
Yes. Order the quantity corresponding to the number of feet required for
your installation.
Which Oetiker clamp fits this Mercury hose?
Use the
Oetiker 4-145 ear clamp
with this Mercury OEM silver fuel hose.
Which primer bulb fits this hose?
The
Pro Marine 8004 5/16" Primer Bulb
matches the hose's 5/16" inside diameter.
Can I use an Oetiker 4-153 clamp on this hose?
The recommended clamp for this Mercury OEM hose is
Oetiker 4-145. The larger 4-153 clamp is matched to
Pro Marine's MPI 315-056 Type B 5/16" hose.
Why do two 5/16" fuel hoses use different clamps?
5/16" describes the hose's inside diameter. Different hose constructions
can have different wall thicknesses and outside diameters, which changes
the required clamp size.
What if I need 5/16" Type B fuel hose?
Use the
MPI 315-056 5/16" Type B1/B2 Fuel Hose
for appropriate exposed and above-deck Type B applications.
What if I need Type A fuel hose?
Pro Marine stocks
5/16" Type A1/A2 Marine Fuel Hose
for installations requiring the Type A classification.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
Mercury 100 fuel hose, Mercury OEM fuel hose, Mercury silver fuel line, Mercury silver fuel hose, 5/16 Mercury fuel hose, 5/16 Mercury fuel line, Mercury outboard fuel hose, Mercury bulk fuel line, Mercury fuel hose by the foot, OEM Mercury fuel line, outboard fuel line, boat fuel hose, 5/16 marine fuel hose, Oetiker 4-145, 4-145 fuel hose clamp, 5/16 primer bulb, Mercury primer bulb hose, bulk marine fuel hose
8M0038500
MPI Type B Marine Fuel Hose
MPI 3/8" Marine Fuel Hose - Type B - Sold by the Foot
The MPI 375 3/8" Fuel Hose is bulk marine fuel line designed for applications using 3/8" inside-diameter hose. It is sold by the foot so you can purchase the continuous length needed for your boat or outboard fuel-system installation.
This is the Type B version, commonly used in exposed and above-deck marine fuel-line applications where Type B hose is appropriate.
Pro Marine also stocks the matching Oetiker 4-185 ear clamp, Pro Marine 8005 3/8" primer bulb, Oetiker installation tools and a 3/8" Type A alternative.
Inside Diameter: 3/8"
Manufacturer: MPI Products
Fuel Hose Type: Type B Marine Fuel Hose
Sold: By the Foot
Recommended Clamp: Oetiker 4-185
Recommended Primer Bulb: Pro Marine 8005 - 3/8"
How to Order Bulk Fuel Hose
This hose is sold by the foot. Enter the quantity based on the total continuous length required for your installation.
For example, if you need 8 feet of fuel hose, order a quantity of 8.
Type B Marine Fuel Hose
Type B marine fuel hose is commonly used in exposed or above-deck fuel-system applications where that hose classification is appropriate.
Type B hose does not carry the same additional fire-test classification associated with Type A marine fuel hose. If the installation requires Type A hose, use the 3/8" Type A option linked below.
For installations requiring the additional Type A fire-resistant classification, use the 3/8" Type A marine fuel hose.
View 3/8" Type A Marine Fuel Hose
Complete Your 3/8" Fuel Line Setup
Pro Marine stocks the correct clamp, primer bulb and installation tools needed to build or service a 3/8" marine fuel-line assembly.
Oetiker 4-185 Ear Clamp - 10 Pack
Matching Oetiker ear clamp for this 3/8" Type B hose. This same clamp is also used with the 3/8" Type A hose listed below.
Clamp: 4-185
View Oetiker 4-185 Clamp
Pro Marine 8005 - 3/8" Primer Bulb
Matching 3/8" primer bulb for building or repairing marine outboard fuel-line assemblies using 3/8" fuel hose.
Hose Size: 3/8"
View 3/8" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Installation tool for properly closing Oetiker ear clamps on marine fuel-line connections.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Complete assortment of commonly used Oetiker clamp sizes with the installation tool included. A convenient setup for marine shops, technicians and customers servicing multiple hose sizes.
View Oetiker Clamp Pack3/8" Type A Alternative
3/8" Type A Marine Fuel Hose - 375-1
Use the Type A version when the installation requires the additional Type A fire-resistant marine fuel-hose classification.
Inside Diameter: 3/8"
Fuel Hose Type: Type A
Matching Clamp: Oetiker 4-185
Primer Bulb: Pro Marine 8005 - 3/8"
3/8" Type A vs. Type B Fuel Hose
| Fuel Hose | Classification | Matching Clamp | Primer Bulb |
|---|---|---|---|
| 375 | Type B | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
| 375-1 | Type A | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
Same Clamp for Both 3/8" Fuel Hoses
Unlike some of the smaller fuel-hose sizes, both of these 3/8" fuel-line options use the same Oetiker 4-185 clamp.
That means the clamp selection stays the same whether you choose the Type A or Type B 3/8" hose. The main decision between the two hoses is the required marine fuel-hose classification for the installation.
What This Fuel Hose is Used For
The 375 3/8" Type B fuel hose is used for building, repairing or replacing marine fuel lines where 3/8" hose and Type B construction are appropriate.
Bulk hose sold by the foot makes it possible to build the required length and pair it with the correct primer bulb, fittings and clamps for the specific boat and engine installation.
Building a 3/8" Outboard Fuel Line
Depending on the application, a complete 3/8" fuel-line setup may include:
- 3/8" Type B marine fuel hose
- Pro Marine 8005 3/8" primer bulb
- Correct tank-side fitting or connector
- Correct engine-side fitting or connector
- Oetiker 4-185 ear clamps
- Oetiker pincer installation tool
Primer Bulb Selection
Primer bulb fittings should match the inside diameter of the fuel hose. For 3/8" fuel line, use the Pro Marine 8005 3/8" Primer Bulb.
View Pro Marine 8005 3/8" Primer Bulb
Key Features & Benefits
- 3/8" inside diameter
- Marine Type B fuel hose
- Commonly used for exposed and above-deck installations where Type B hose is appropriate
- Sold by the foot for custom-length installations
- Uses Oetiker 4-185 ear clamp
- Matching Pro Marine 8005 3/8" primer bulb available
- 3/8" Type A alternative available
- Type A and Type B hoses both use the same 4-185 clamp
- Oetiker pincer installation tool available
- Complete Oetiker clamp assortment with tool available
Need Help Choosing the Right Marine Fuel Hose?
Fuel-hose diameter is only one part of choosing the correct line. Installation location, Type A or Type B classification, primer bulb size, fittings and clamp selection should all be considered.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is this fuel hose?
This hose has a 3/8" inside diameter.
Is this fuel hose sold by the foot?
Yes. Order the quantity corresponding to the total number of feet needed.
What type of marine fuel hose is this?
This is Type B marine fuel hose.
Which clamp fits this 3/8" Type B hose?
Use the
Oetiker 4-185 ear clamp
.
Which primer bulb fits this hose?
Use the
Pro Marine 8005 3/8" Primer Bulb
.
What if I need 3/8" Type A fuel hose?
Use the
375-1 3/8" Type A Marine Fuel Hose
.
Does the 3/8" Type A hose use the same clamp?
Yes. Both the Type A and Type B 3/8" hoses use the
Oetiker 4-185 ear clamp.
Can I use the same primer bulb with the Type A hose?
Yes. Both hoses have a 3/8" inside diameter, so the
Pro Marine 8005 3/8" primer bulb is the matching size
for either hose.
What tool installs the Oetiker clamps?
Use the
Oetiker Standard Jaw Pincer Tool
.
Do you sell a complete clamp assortment?
Yes. The
Oetiker Clamp Pack with Tool
includes commonly used clamp sizes and the installation tool.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 in the continental U.S.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help choosing the correct fuel-line parts?
Contact Pro Marine
Phone: 941-721-3000
Searchable Part Numbers & Terms
375, MPI 375, 3/8 fuel hose, 3/8 marine fuel hose, 3/8 boat fuel line, 3/8 outboard fuel hose, Type B marine fuel hose, Type B fuel line, marine fuel line by the foot, bulk marine fuel hose, above deck fuel hose, Oetiker 4-185, 4-185 fuel hose clamp, 8005, Pro Marine 8005, 3/8 primer bulb, marine primer bulb, outboard primer bulb, 375-1, 3/8 Type A fuel hose, marine fuel hose, outboard fuel line, boat fuel hose
