BRP E250DHLSCS, Service Manual

Page: 210 / 396

208
COOLING SYSTEM
THERMOSTAT SERVICING
Start the outboard and check IDLE operating tem-
perature using
Evinrude Diagnostics
software pro-
gram.
If IDLE temperature increases to specific operat-
ing range, 160°F ± 10°F (71°C ± 6°C), after pinch-
ing off hoses and eliminating water flow to the
cylinder heads, pressure relief valve is leaking.
Replace pressure relief valve.
If IDLE temperature is still below operating range
with hoses pinched off, inspect thermostats and
thermostat seals.
Thermostats
Remove thermostat cover(s) and inspect thermo-
stat(s).
Check position of thermostat seal and how ther-
mostat seals against cylinder head. Seal must be
properly fitted to flange of thermostat.
Check thermostat for cracks, heat damage, or
signs of corrosion. Check for proper operation.
Thermostat opens at 143°F (62°C).
THERMOSTAT
SERVICING
Disassembly
Remove the thermostat cover and O-ring from cyl-
inder head.
Remove spring, thermostat, and gasket.
Inspection
Inspect all parts for cracks, heat damage, or signs
of corrosion. Replace damaged parts. Clean
debris from housing and parts.
Assembly
Assembly is the reverse of disassembly. Pay
close attention when performing the following
additional
tasks.
Coat threads of each cylinder head thermostat
cover with
Gasket Sealing Compound
. Install and
tighten the cover to a torque of 120 to 144 in. lbs.
(13.5 to 16.5 N·m).
004338
1. Seal, thermostat
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004338
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