Diaphragm Set for Honda Acty Truck HA3, HA4 (1990-1999) - Seal and Gasket Kit, including a spring, rubber diaphragm, and metal housing, ensuring a tight seal for the truck's components, preventing leaks and maintaining performance.
Seal and Gasket Kit for Honda Acty Truck - A comprehensive set for HA3 and HA4 models (1990-1999), offering a snug fit to prevent leaks, preserve component integrity, and maintain optimal truck performance.
Diaphragm Set Diagram for Honda Acty Truck HA3, HA4 (1990-1999) - Technical illustration of the seal and gasket kit, detailing its integration into the truck's engine, providing a tight seal for smooth performance.
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Diaphragm Set for Honda Acty Truck HA3, HA4 (1990-1999) - Seal and Gasket Kit, including a spring, rubber diaphragm, and metal housing, ensuring a tight seal for the truck's components, preventing leaks and maintaining performance.Seal and Gasket Kit for Honda Acty Truck - A comprehensive set for HA3 and HA4 models (1990-1999), offering a snug fit to prevent leaks, preserve component integrity, and maintain optimal truck performance.Diaphragm Set Diagram for Honda Acty Truck HA3, HA4 (1990-1999) - Technical illustration of the seal and gasket kit, detailing its integration into the truck's engine, providing a tight seal for smooth performance.

Diaphragm Set - Seal & Gasket Kit - Honda Acty Truck HA3, HA4 Models - 1990-1999

Oiwa Garage
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Price:
$119.90

Need help? Call or Text: 562-661-8862

Description

This diaphragm seal and gasket kit fits the Honda Acty Truck HA3, HA4 (1990-1999). It renews the diaphragm and related seals in the affected engine circuit.

In Stock - ships from our California (USA) warehouse

Fast, reliable delivery - no overseas backorder wait.

Vehicle Fitment & Compatibility

Confirm your chassis code against the table below before ordering.

Honda Acty Truck HA3, HA4 (1990-1999) - fitment
Make Honda
Model Acty Truck
Chassis Codes HA3, HA4
Years 1990-1999
Part Type diaphragm seal and gasket kit

100% Fitment Guarantee

Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full.

Reasons to choose this diaphragm seal and gasket kit

  • A torn or hardened diaphragm
  • A vacuum or fuel circuit that will not hold
  • You are servicing the affected assembly

Features & Function

  • Renews the diaphragm and seals
  • Matched to the Acty assembly
  • Restores the circuit seal

Installation Specifications

  • Difficulty: Moderate.
  • Estimated time: about 1 to 2 hours.
  • Required tools: A screwdriver set and small hand tools.

Oiwa Garage Tech Note

"This part sits inside the Acty carburetor. While the carb is apart for cleaning, inspect the spring - it can wear out and stop working correctly, and the only reliable way to check it is with the carburetor off the truck."

Frequently Asked Questions

How do I know the diaphragm has failed?

If the affected circuit will not hold vacuum or fuel, pull the assembly and inspect the diaphragm for tears, hardening, or a stretched shape. A torn diaphragm cannot hold pressure.

Should I replace this if it is not leaking yet?

If you already have the area apart for other work, fit a fresh one while the labor is done. Otherwise replace it once it weeps.

Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.

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