Yamaha - Cover, thermostat - 6H4-12413-00-1S Circulation & Air Conditioning Pumps When your outboard’s water pump

When your outboard’s water pump is healthy

This product has been superseded by: GP1-U2132-00-00

Its great looks will be welcome on your boat

Many aftermarket parts can have incorrect opening temperatures or inconsistent quality

Neutral Warm-Up Controls: Supports warm-up without shifting into gear

Yamaha - Cover, thermostat - 6H4-12413-00-1S Circulation & Air Conditioning Pumps When your outboard’s water pumpYamaha Thermostat Cover Cooling System Housing 6H4 12413 00 1S Overview Ive seen cooling issues come down to something as simple as a bad seal around the thermostat housing. This cover keeps everything contained and flowing the way it should once the engine warms up. If its warped, cracked, or not sealing right, you can end up chasing temperature problems that dont make sense at first. Its a straightforward part, but it plays a key role in keeping the