$15.00
The Marine-Grade Brass Primer Tee is a durable alternative to the original Johnson/Evinrude 313537 primer tee used in select outboard fuel-primer systems.
Designed to replace the original plastic-style fitting, this brass version offers improved resistance to cracking, brittleness, and long-term deterioration while maintaining the same fuel-routing function between the primer system and carburetor circuit.
Ideal for restorations, performance engines, and racers looking for a stronger, longer-lasting primer-system fitting.
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The Marine-Grade Brass Primer Tee is a durable replacement and upgrade for the original Johnson/Evinrude Primer Tee 313537 / 0313537 used in select outboard fuel-primer systems.
The original tee performs an important job by routing fuel from the primer system toward the carburetor or intake circuit during starting. Over time, however, older plastic-style fittings can become brittle, crack, loosen around the hose connections, or begin leaking from age, vibration, heat, and repeated fuel exposure.
This brass replacement performs the same fuel-routing function while providing a more durable fitting for long-term marine use.
Plastic fuel fittings can work well for years, but age and environmental exposure eventually take a toll.
Common problems with older plastic tees include:
A brass fitting is far less likely to become brittle with age and provides a stronger connection point for the primer hoses.
For engines that are regularly serviced, raced, or kept in service for many years, upgrading this small component can eliminate one potential weak point in the fuel system.
The primer tee is part of the engine’s starting enrichment system.
When the primer solenoid is activated, fuel is routed through small primer hoses toward the carburetor or intake circuit. The tee provides a junction point that divides or redirects that fuel where it is needed.
A properly sealed fitting helps maintain:
Even though it is a small component, a leaking or damaged tee can create surprisingly noticeable starting problems.
Possible symptoms include:
If any of these conditions are present, the tee should be inspected along with the surrounding hoses and primer system.
Marine environments expose fuel-system components to:
Marine-grade brass offers excellent durability in these conditions and is well suited for fuel-fitting applications when the proper compatible material is used.
Unlike aging plastic, brass does not become brittle in the same way, making it a strong choice for customers who want a longer-lasting replacement.
This upgrade is especially useful when replacing:
If one plastic fitting has become brittle, it is worth inspecting the rest of the fuel system at the same time.
For performance and race outboards, small fuel-system issues can create big problems.
A tiny air leak or fuel leak in the primer circuit can make an otherwise healthy engine harder to start and can lead to unnecessary troubleshooting at the dock or in the pits.
At Liquid Revolutions, we know that upgrading small weak points can make a big difference in overall reliability. Replacing an aging plastic tee with a marine-grade brass version provides a more durable solution and helps reduce the chance of cracking or fitting failure over time.
For racers, restorers, and anyone maintaining an older Johnson/Evinrude outboard, this brass primer tee is a simple upgrade that improves durability without changing the basic function of the fuel-primer system.
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 1 × 1 × 1 in |
