Camco Boat Winterizer-Do It Yourself, Direct Drive

Camco 65506 Do-It-Yourself Inboard Boat Winterizing Kit

The Camco 65506 Inboard Boat Winterizing Kit provides a convenient way to flush and prepare an inboard engine's raw-water cooling system for seasonal storage. Designed for boats with a compatible thru-hull water intake, the system can be used with many direct-drive and V-drive inboard installations.

The multi-valve assembly allows the engine to run on fresh water until it reaches operating temperature. Once the thermostat opens, the cooling-system supply can be switched from fresh water to marine antifreeze without disconnecting the system. This helps replace water inside the engine block and raw-water cooling passages before freezing temperatures arrive.

Product Features

Designed for winterizing compatible inboard marine engines

Suitable for many direct-drive and V-drive boat installations

Flushes particulates and impurities from the raw-water cooling system

Separate valves control the fresh-water and antifreeze supplies

Switches from fresh water to antifreeze without disconnecting the system

Allows the engine to reach operating temperature before antifreeze is introduced

Reusable components can be flushed, dried and stored after winterization

What's Included

12" x 7" x 3-1/2" multi-valve assembly

6' winterizing hose

5-gallon antifreeze container

Antifreeze container hose adapter

Installation clamps

Inboard Application

The Camco 65506 is intended for inboard boats with a compatible thru-hull raw-water intake. Direct drive and V-drive describe the boat's drivetrain arrangement; compatibility with this kit depends on the location and accessibility of the engine's raw-water intake. Inspect the boat's cooling-water intake configuration before beginning.

How It Works

Connect the winterizing system to a fresh-water supply and compatible inboard motor flusher positioned over the boat's thru-hull water intake. Run the engine at idle until it reaches operating temperature. The multi-valve assembly is then used to close the fresh-water supply while opening the antifreeze supply, directing marine antifreeze into the engine's raw-water cooling system.

What You Will Need

Propylene-glycol marine engine winterizing antifreeze with burst protection of at least -50°F

Fresh-water supply and garden hose

Compatible thru-hull inboard motor flusher

Recommended Inboard Motor Flusher

For compatible boats with a thru-hull water intake, we recommend the Moeller 099085-00 Pro Inboard Motor Flusher. The flusher creates a temporary water connection over the raw-water intake beneath the boat.

Motor flusher and marine antifreeze are not included. Confirm that the flusher fits securely over the boat's raw-water intake before operating the engine.

Important Usage Information

Read the Camco instructions and engine manufacturer's winterization procedure before beginning

Position the antifreeze container as directed in the installation instructions

Allow the engine to reach operating temperature before switching to antifreeze

Operate the engine at idle during the flushing and winterization process

Maintain an adequate supply of fresh water or antifreeze to the raw-water intake

Shut down the engine immediately when the antifreeze container is empty

Flush the winterizer components with fresh water and allow them to dry before storage

View the Camco 65506 Inboard Boat Winterizer Instructions (PDF)