Crosseven Universal Fuel Primer Bulb

High-quality Crosseven marine fuel primer bulb designed for use with approximately 10 mm / 3/8" & 8 mm / 5/16" internal diameter fuel hose.

Designed for outboard and marine petrol fuel systems, the primer bulb allows the fuel line to be manually primed, helping draw fuel from the tank towards the engine before starting.

These incorporate non-return / one-way valves to help maintain the fuel column within the fuel system.

Crosseven Part Number

P206658 & P204867

Suitable For

Suitable for marine and outboard fuel systems using:

10 mm / 3/8" or 8 mm / 5/16"Fuel Hose

Can be used on compatible fuel systems for many outboard brands, including:

Mercury
Mariner
Yamaha
Suzuki
Honda
Tohatsu
Johnson
Evinrude
OMC
Other compatible marine fuel systems

Important

This is a universal marine primer bulb based primarily on fuel hose size and fuel-system configuration.

Compatibility should be determined by the internal diameter of the fuel hose and fuel-system requirements, rather than engine brand or horsepower alone.

Fuel Hose Size

10 mm / 3/8" Internal Diameter Fuel Hose

3/8" = approximately 9.5 mm

Commonly referred to as 10 mm / 3/8" marine fuel hose.

Crosseven P206658 is specifically listed as the 10 mm version.

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8 mm / 5/16" Internal Diameter Fuel Hose

5/16" = approximately 7.9 mm

Designed for 8 mm / 5/16" fuel hose. Crosseven specifically lists P204867 as its 8 mm version.

Please measure the internal diameter of your existing fuel hose before ordering.

Product / Cross-Reference Numbers

Crosseven

P206658
P204867

Mercury / Mariner References

13330A3
13330Q3

Johnson / Evinrude References

174512
5008586
176444
755639

These OEM numbers are useful for identification/reference; compatibility should still be checked against the particular fuel system.

Product Features

Crosseven branded marine product
Universal marine fuel primer bulb
Integrated non-return / one-way valves
Hydrocarbon-resistant elastomer construction
Designed for petrol outboard fuel systems
Helps prime the fuel system before starting
Helps maintain the fuel column after priming
Suitable for compatible outboard fuel installations
Ideal replacement for worn, cracked or hardened primer bulbs
Marine fuel-system component
New
UK stock

One-Way Fuel Valve

The primer bulb incorporates non-return valves that allow fuel to flow in the required direction while helping prevent it from flowing back towards the fuel tank.

Always install the primer bulb in the correct direction.

Check the fuel-flow arrow on the primer bulb before installation.

The arrow should point in the direction of fuel flow:

FUEL TANK → PRIMER BULB → ENGINE

Important – Check Your Fuel Hose Size

Please check the INTERNAL diameter of your existing fuel hose before purchasing.

The two primer bulbs can look very similar, so please check your hose size carefully before ordering. The two product sizes are separately listed as 8 mm P204867 and 10 mm P206658.

Installation

When installing the primer bulb:

Confirm your fuel hose inner diameter
Check the direction of fuel flow
Install with the arrow pointing towards the engine
Push the fuel hose fully onto the connections
Secure the hose correctly
Prime the fuel system
Check all connections carefully for fuel leaks before operating the engine

Any fuel hose that is cracked, hardened, damaged or deteriorated should also be replaced.

Important – Please Check Compatibility

This is a universal marine component and should be selected according to your fuel hose size and fuel-system configuration.

Before purchasing, please confirm:

Fuel hose internal diameter
Primer bulb configuration matches your installation
Fuel-flow direction is correct
Product is suitable for your particular fuel system

If the part looks the same as yours, this does not always mean it is the correct one for your outboard or fuel system.

If you are unsure, please contact SSI Marine before purchasing.

Why Buy From SSI Marine?

Quality branded marine parts
Workshop-tested products
More than 10 years supplying outboard parts
UK stock
Same working day dispatch before 1 PM Monday–Friday
Royal Mail Tracked 24
Technical support from experienced outboard specialists
Collection available from Leigh, Greater Manchester
Workshop open Monday–Friday, 9 AM–5 PM

Crosseven P206658 Universal Outboard Fuel Primer Bulb One Way Valve Marine Fuel Line