OFS-PRO 3 Engine Setup Fittings Kit | Reverso 35-3955-01-03

Reverso OFS-PRO 3 Engine Setup Fittings Kit | 35-3955-01-03 | Oil Flushing System Engine Adapter Kit

The Reverso OFS-PRO 3 is a permanently installed marine oil change and flushing system that allows you to drain and refill engine oil, flush raw water cooling circuits, and winterize your engine from a single topside access point — no reaching into the bilge, no mess, no hand pump. The #35-3955-01-03 is the engine setup fittings kit that adapts the OFS-PRO 3 system to your specific engine's oil drain and flush ports. Without the correct fittings kit for your engine, the OFS-PRO 3 system cannot be properly installed — this kit provides the engine-side connections that complete the installation.

Part Details:

• Part Number: 35-3955-01-03
• SKU: REVERSO-35-3955-01-03
• Manufacturer: Reverso
• Type: Engine Setup Fittings Kit — OFS-PRO 3 Oil Flushing System
• Application: Adapter fittings kit for OFS-PRO 3 system installation on compatible marine engines — verify engine compatibility against Reverso's fitment guide before ordering
• Includes: Engine-side adapter fittings, connectors, and hardware required for OFS-PRO 3 system integration
• Use: Engine oil drain, oil fill, and raw water flushing circuit connections for the OFS-PRO 3 system
• Condition: New
• Country of Origin: USA

Additional Information

How the Reverso OFS-PRO 3 System Works:

The OFS-PRO 3 installs permanently on your engine and connects to your oil drain, oil fill port, and raw water flushing inlet. Once installed, all routine service operations are performed through quick-connect fittings routed to an accessible location in the engine compartment or bilge:

• Oil changes — connect the OFS-PRO 3 pump to the drain fitting, extract the used oil without removing drain plugs or accessing tight bilge spaces, then refill through the fill port connection
• Raw water flushing — connect a fresh water supply to the flush inlet fitting and run the engine to flush salt, sediment, and deposits from the raw water cooling circuit without a flushing adapter at the lower unit
• Winterization flushing — the same flush circuit can be used to circulate antifreeze through the raw water cooling passages during winterization

The engine setup fittings kit (35-3955-01-03) provides the engine-side connections that mate the OFS-PRO 3 system to your specific engine's drain and flush ports. Reverso engineers different fittings kits for different engine families — the correct kit ensures proper thread engagement, correct port sizing, and leak-free connections at every service point.

Why Permanent Engine Flushing Systems Matter:

Manual flushing with a hose and ear muffs is the standard approach but has real limitations — it requires the boat to be out of the water, depends on a reliable hose connection that can slip or leak during the flush, and makes it easy to skip the flush when time is short at the end of a day on the water. A permanently installed flushing system removes every barrier to proper post-use flushing: the connection is always there, always correct, and the flush can be performed while the engine is still warm from use. For saltwater boats especially, consistent post-use flushing is the single most effective practice for extending raw water cooling system life.

Frequently Asked Questions

1. How do I confirm this fittings kit is compatible with my engine?
The 35-3955-01-03 is an engine-specific adapter kit — Reverso produces different fittings kits for different engine families. Verify compatibility using Reverso's engine fitment guide, or contact us at MacombMarineParts.com with your engine make, model, and year and we'll confirm the correct kit before you order. Do not assume compatibility based on part number similarity alone.

2. Do I need the OFS-PRO 3 pump unit separately?
Yes — the 35-3955-01-03 is the engine-side fittings kit only. The OFS-PRO 3 pump unit and any topside routing hardware are separate components. If you are building a complete OFS-PRO 3 installation, you will need the pump unit, the engine setup fittings kit (this part), and any hose or routing hardware required for your specific installation location. Contact us at MacombMarineParts.com for help specifying a complete OFS-PRO 3 system for your engine and vessel.

3. Can this fittings kit be used for winterization antifreeze circulation?
Yes — the raw water flush circuit connection included in the OFS-PRO 3 engine fittings kit allows you to circulate antifreeze through the raw water cooling passages as part of your winterization procedure, in addition to its use for post-season and post-use flushing. This eliminates the need for a separate flush adapter at the lower unit during winterization.

4. Is this a DIY installation or does it require a marine technician?
OFS-PRO 3 system installation involves connecting to engine oil drain and fill ports and to the raw water cooling inlet — work that requires proper access to the engine, familiarity with marine fuel and cooling system connections, and attention to thread sealant and torque specifications to ensure leak-free connections. Experienced DIY installers familiar with their engine can complete the installation using Reverso's installation documentation. If you are not confident working on marine engine plumbing connections, we recommend having the system installed by a qualified marine technician.