BRP E-TEC EVINRUDE - Pressure Relief Valve; Thermostat

183
Cooling System
Components
9
• Provides exhaust passages which connect to
the gearcase.
Pressure Relief Valve
A pressure relief valve is used to control water
flow and operating temperature at higher speeds
(above approximately 1800 RPM). The pressure
relief valve opens as water pressure increases.
Spring tension sets the opening pressure.
Overheating: A restricted or faulty valve typically
results in HIGH SPEED overheating.
Overcooling: Debris may prevent the valve from
closing completely.
Thermostat
The thermostat controls water flow and operating
temperature at lower speeds (below 1800 RPM).
Overheating: A restricted or faulty thermostat typ-
ically results in LOW SPEED overheating.
Overcooling: Debris may prevent the thermostat
from closing completely.
1. Megaphone
2. Exhaust housing
3. Water tube
4. Adapter housing
5. Inner exhaust housing
002436
Pressure Relief Valve Components
002437
4
3
5
1
2
1. Cover and O-ring
2. Spring and thermostat
3. Cylinder head
4. Cylinder head seal
002439
3
2
4
1