How Often Should You Replace Outboard Thermostat. A thermostat regulates the temperature of the water for engine cooling and keeps pressure in the cooling system to facilitate heat transfer from the heads and the cylinder walls. How often should you change the impeller on a Mercury outboard motor.
Opportune Times To Replace A Thermostat. In my case I mainly run in fresh want and when in saltwater I usual run 20 miles returning to my home port. Yamaha recommends service intervals based on typical use that includes operating at varied speeds sufficient time for the engine warm up and cool down medium to light and average cruising speed near 3000 to 4000 rpm range.
This was performed on a yamaha 2008 outboard F250hp.
Yamaha Outboard Service Tips. Each outboard engine thermostat should be replaced at least every two years. Yamaha Four Stroke Maintenance Schedule. Hope you enjoy my how t.
