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Home > Outboard > Tohatsu / Nissan Outboard

Tohatsu & Nissan Outboard Parts

Shop OEM and aftermarket Tohatsu and Nissan outboard parts for maintenance, repair, troubleshooting, and complete engine service projects. Browse marine parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, steering, trim, and routine service items.

Pro Marine USA carries Tohatsu and Nissan outboard engine parts for a wide range of 2-stroke, Four Stroke, EFI, and TLDI applications. Use your engine horsepower, model number, serial number, or OEM part number whenever possible to confirm fitment before ordering.

Shop Tohatsu & Nissan Outboard Parts by System

Find the Correct Tohatsu or Nissan Outboard Part

Tohatsu and Nissan outboard parts can vary by horsepower, model number, engine family, and production range. If you are unsure which component fits your engine, use the OEM parts lookup to identify the original part number from a factory parts diagram.

Once you have the OEM part number, search Pro Marine to find available OEM and aftermarket replacement options.

Use Our OEM Parts Lookup »

Common Tohatsu & Nissan Outboard Engine Families

Pro Marine supports many Tohatsu and Nissan outboards across a wide horsepower range. Always confirm the exact engine model and serial information before ordering parts.

Portable and Small Outboards: common 2.5HP through 30HP 2-stroke and Four Stroke applications
Midrange: 35HP through 70HP applications across multiple engine families
Three-Cylinder Platforms: common 75HP through 90HP applications
High-Horsepower: 115HP through 140HP applications
EFI: electronically fuel-injected Tohatsu platforms
TLDI: Tohatsu direct-injection 2-stroke engine families

Common Tohatsu & Nissan Repair Areas

Engine overheating: inspect the water pump, impeller, thermostat, cooling passages, pressure-control components, and engine anodes.
Hard starting or rough running: inspect fuel pumps, carburetors or injectors, filters, spark plugs, ignition components, and intake sealing.
No spark or electrical problems: inspect ignition coils, stators, CDI components, rectifiers, sensors, wiring, and grounds.
Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and other internal engine components.
Lower unit noise or water intrusion: inspect prop shaft seals, driveshaft seals, shift shaft seals, bearings, gears, and gear lube condition.
Trim or steering problems: inspect trim motors, hydraulic components, steering systems, hoses, seals, and related rigging parts.

Why Buy Tohatsu & Nissan Outboard Parts from Pro Marine USA?

OEM and aftermarket replacement options for many Tohatsu and Nissan outboard applications.
Parts for routine maintenance, professional repair, lower units, fuel systems, electrical systems, steering, trim, and internal engine work.
OEM diagram and part-number lookup tools to help identify the correct component before ordering.
Dealer pricing available for qualified marine repair businesses and dealers.
Large selection of cooling, fuel, electrical, lower unit, and service components.
Fast weekday shipping on qualifying in-stock orders.

Frequently Asked Questions

How do I find the correct Tohatsu or Nissan outboard part?

Start with the engine horsepower, model number, serial number, and production information whenever available. Use the OEM parts lookup to identify the original part number from a factory diagram.

Can I search Tohatsu and Nissan parts by OEM part number?

Yes. Enter the OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.

Do Tohatsu and Nissan outboard parts interchange?

Some Tohatsu and Nissan outboard applications share related engine platforms and components, but fitment should never be assumed. Confirm the model, production range, and OEM part number before ordering.

Do you carry parts for Tohatsu TLDI engines?

Yes. Pro Marine carries parts for many Tohatsu TLDI applications, including cooling, fuel, electrical, internal engine, lower unit, steering, and trim components.

Do you carry parts for older Nissan outboards?

Yes. Pro Marine carries replacement parts for many older Nissan outboard applications. Availability varies by engine family and component.

What Tohatsu and Nissan parts are commonly replaced during routine maintenance?

Common maintenance items include engine oil, oil filters where applicable, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service components.

Fitment Tip: Tohatsu and Nissan outboard parts can vary by model, horsepower, engine family, and production range. Confirm the OEM part number or complete engine identification information whenever possible before ordering.

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3/8" Marine Fuel Hose Type A - 375-1

Bulk 3/8" Fuel Line for Enclosed and Below-Deck Applications

Type A Marine Fuel Hose

3/8" Type A Marine Fuel Hose - Sold by the Foot

The 375-1 3/8" Type A Marine Fuel Hose is bulk marine fuel line for applications requiring 3/8" inside-diameter hose and the additional fire-resistant protection associated with Type A marine fuel hose.

Type A hose is commonly selected for enclosed, below-deck and other marine fuel-system installations where Type A hose is required. The hose is sold by the foot so you can purchase the continuous length needed for your installation.

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 B alternative.

3/8" Type A Bulk Marine Fuel Line

Inside Diameter: 3/8"
Fuel Hose Type: Type A 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 continuous hose length required for your installation.

For example, if your fuel-system layout requires 10 feet of hose, order a quantity of 10.

What is Type A Marine Fuel Hose?

Type A marine fuel hose is designed for installations requiring the additional fire-resistant protection associated with the Type A classification.

It is commonly used in enclosed and below-deck fuel-system routing and in other locations where Type A hose is specified by the boat builder, engine manufacturer or applicable installation requirements.

Fuel hose should always be selected based on both hose diameter and installation type.

Need 3/8" Type B Fuel Hose Instead?

For exposed and above-deck applications where Type B marine fuel hose is appropriate, use the 375 3/8" Type B fuel hose.

View 3/8" Type B Marine Fuel Hose

Complete Your 3/8" Fuel Line Setup

Pro Marine stocks the matching clamp, primer bulb and Oetiker 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 A marine fuel hose.

Clamp: 4-185

View Oetiker 4-185 Clamp

Pro Marine 8005 - 3/8" Primer Bulb

Matching 3/8" primer bulb for compatible outboard fuel-line assemblies using 3/8" 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

Assortment of commonly used Oetiker clamp sizes with the installation tool included. A convenient option for marine shops and technicians servicing multiple fuel-line sizes.

View Oetiker Clamp Pack

3/8" Type B Alternative

3/8" Type B Marine Fuel Hose - 375

Type B alternative for exposed and above-deck fuel-line installations where Type B hose is appropriate.

Inside Diameter: 3/8"
Fuel Hose Type: Type B
Matching Clamp: Oetiker 4-185
Primer Bulb: Pro Marine 8005 - 3/8"

View 3/8" Type B Fuel Hose

3/8" Type A vs. Type B Fuel Hose

Fuel Hose	Classification	Matching Clamp	Primer Bulb
375-1	Type A	Oetiker 4-185	Pro Marine 8005 - 3/8"
375	Type B	Oetiker 4-185	Pro Marine 8005 - 3/8"

Same Clamp for Both 3/8" Fuel Hoses

Both the 375-1 Type A and 375 Type B 3/8" fuel hoses use the same Oetiker 4-185 ear clamp.

That makes clamp selection simple when changing between these two 3/8" hose types. The main consideration is the required fuel-hose classification for the installation.

What This Fuel Hose is Used For

The 375-1 3/8" Type A fuel hose is intended for building, repairing or replacing marine fuel lines requiring 3/8" Type A hose.

Selling the hose by the foot makes it suitable for custom-length installations and allows it to be paired with the appropriate primer bulb, fittings, connectors and clamps.

Building a 3/8" Type A Fuel Line

Depending on the application, a complete setup may include:

375-1 3/8" Type A 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
Type A marine fuel-hose construction
Designed for installations requiring Type A fire-resistant protection
Commonly used in enclosed and below-deck marine fuel systems
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 B alternative available
Type A and Type B 3/8" hoses 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 the 375-1 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 number of feet needed.

What type of marine fuel hose is 375-1?
The 375-1 is Type A marine fuel hose.

Where is Type A fuel hose commonly used?
Type A hose is commonly selected for enclosed and below-deck installations and other fuel-system applications requiring its additional fire-resistant classification.

Which clamp fits this 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 B fuel hose?
Use the 375 3/8" Type B Marine Fuel Hose .

Does the Type B hose use the same clamp?
Yes. Both 3/8" Type A and Type B hoses use the Oetiker 4-185 ear clamp.

Can I use the same primer bulb on Type A and Type B hose?
Yes. Both hoses use a 3/8" inside diameter, so the Pro Marine 8005 3/8" primer bulb matches both.

What tool installs the Oetiker clamp?
Use the Oetiker Standard Jaw Pincer Tool .

Do you sell a clamp assortment?
Yes. The Oetiker Clamp Pack with Tool includes common 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.

Apply for a Dealer Account

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

375-1, 3/8 Type A fuel hose, 3/8 marine fuel hose, 3/8 boat fuel line, below deck fuel hose, enclosed marine fuel line, Type A marine fuel hose, marine fuel line by the foot, bulk marine fuel hose, outboard fuel line, boat 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, 3/8 Type B fuel hose, marine fuel system, boat fuel line

Item#:

375-1

Manufacturer:

Pro Marine

Available:

In Stock

Your Price:

6.19

Foot

Qty:

Ear Clamp, 10 pack 13/16"

17.8-21mm / .701-.827" Band Dim 7x0.6mm 316 SS

Item#:

4-210

Manufacturer:

Pro Marine

Available:

In Stock

Your Price:

9.88

Pack

Qty:

5/16" Marine Fuel Hose Type A - Sold by Foot

MPI Low-Permeation Fuel Line for Enclosed and Below-Deck Applications

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.

5/16" Type A Low-Permeation Marine Fuel Hose

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

Fuel Feed Applications: Use the Correct Type A Classification

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 Pack

Other 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 Hose

5/16" 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.