AOFS Engine Setup Fittings Kit | Reverso 35-3955-02

Reverso 35-3955-02 AOFS Engine Setup Fittings Kit | 3/4" Inlet | 3/8" & 1/2" Outlet | OFS Engine Connection

The Reverso #35-3955-02 is the engine setup fittings kit for the Reverso Automatic Outboard Flushing System (AOFS/OFS). Contains all fittings required to connect the OFS system to the engine's cooling water inlet and outlet ports. Includes straight and 90° elbow options for both inlet and outlet to accommodate different engine configurations and routing constraints. The 1/2" outlet fittings are recommended for engines 300HP or more.

Part Details:

• Part Number: 35-3955-02 (Reverso)
• SKU: REVERSO-35-3955-02
• Manufacturer: Reverso
• Type: Engine Setup Fittings Kit — AOFS/OFS Engine Connection
• Condition: New

Kit Contents:

• Inlet fittings (3/4"):
  • 3/4" straight fitting
  • 3/4" 90° elbow fitting
• Outlet fittings — standard (engines under 300HP):
  • 3/8" hose barb straight fitting
  • 3/8" hose barb 90° elbow fitting
• Outlet fittings — high-horsepower (300HP or more, recommended):
  • 1/2" hose barb straight fitting
  • 1/2" hose barb 90° elbow fitting

Additional Information

What This Kit Is For — Engine-Side OFS Connection:

The 35-3955-02 contains the fittings that connect the Reverso OFS system to the engine itself — specifically to the engine's cooling water inlet and the cooling water outlet (flush port or thermostat housing). This is the engine-side interface of the OFS installation. The inlet fittings connect to the OFS system's water supply line at the engine; the outlet fittings connect where the flushed water exits the engine. This kit is required for initial OFS installation on the engine — not for the deck or hose connections (those are separate Reverso components).

Outlet Fitting Size — 3/8" vs. 1/2" by Horsepower:

The kit includes both 3/8" and 1/2" outlet fittings to accommodate different engine cooling system port sizes:

• 3/8" outlet fittings — for standard outboard engines under 300HP. The 3/8" barb fits the cooling water outlet port size common on most outboards in this horsepower range.
• 1/2" outlet fittings (recommended for 300HP+) — higher-horsepower engines have larger cooling water flow requirements and correspondingly larger outlet port sizes. Using an undersized outlet fitting on a high-output engine can restrict cooling water flow and cause engine overheating. Use the 1/2" fittings on engines 300HP or more.

Confirm the correct outlet fitting size against your engine's service manual or Reverso's installation guide for your specific engine before installation.

Straight vs. 90° Elbow — Routing Flexibility:

Each fitting size is provided in both straight and 90° elbow configurations. Use the straight fitting where the hose runs in line with the port; use the 90° elbow where a direction change is needed at the engine port to accommodate hose routing constraints. Having both options in the kit eliminates the need to source fittings separately for different engine configurations.

Inlet Fitting — 3/4" Standard:

The inlet fittings are 3/4" — consistent with the Reverso OFS system's 3/4" water supply line and the 35-3951-03 inlet hose kit. No adapter is required between the OFS inlet hose and the engine inlet fitting for standard installations.

Installation Notes:

• Confirm outlet fitting size (3/8" or 1/2") against your engine's cooling water outlet port specification before installation — use 1/2" for 300HP+ engines
• Select straight or 90° elbow based on hose routing geometry at the engine connection point
• Use only one straight or one elbow per port — the kit provides both options; use what fits your installation
• Refer to Reverso OFS installation documentation for the correct engine connection procedure for your specific engine and OFS version
• Check all fitting connections for leaks after installation before running the flush cycle

Frequently Asked Questions

1. What does this fittings kit connect?
The 35-3955-02 connects the Reverso OFS system to the engine's cooling water inlet and outlet ports. It is the engine-side interface of the OFS installation — not the deck connection or hose routing components.

2. Which outlet fitting size should I use — 3/8" or 1/2"?
Use the 3/8" outlet fittings for engines under 300HP. Use the 1/2" outlet fittings for engines 300HP or more — Reverso recommends the larger fitting for high-horsepower engines to avoid restricting cooling water flow. Confirm against your engine's service manual or Reverso's installation guide for your specific engine.

3. Do I need to buy both straight and elbow fittings separately?
No — the 35-3955-02 includes both straight and 90° elbow fittings for each size. Select the configuration that fits your engine installation geometry. You will use one or the other at each port — not both.

4. Is this kit compatible with OFS Pro?
The kit contents (inlet and outlet fittings) are engine-side components and are not OFS-version-specific in the same way as the remote switch. However, confirm compatibility with your specific OFS version against Reverso's installation documentation before ordering.

5. Does this kit include the inlet hose or deck fitting?
No — the 35-3955-02 contains engine connection fittings only. For the inlet hose, see the Reverso 35-3951-03 OFS Inlet Hose Kit. For the deck quick-disconnect fitting, see the Reverso 35-3952-08 OFS Quick Disconnect Connection Kit.