Cosmetic Care & Maintenance
7-33
Checking Typical Volvo Cooling System
Your cooling system requires inspection and maintenance with each
trip, with extended maintenance every 50 hours. In addition, the
water pump impeller needs replacement every two years.
To inspect your cooling system, all lines need to be visually inspected
for cracks, melting, crimped spots, and leaks. These lines lead from
your raw water intake system to your water pump, which circulates
water internally through the engine.
Check the intake and exhausting lines before each voyage. These
lines enter your water pump which is normally located on the forward
side of your engine near the bottom.
To fl ush your engine, ensure that the engine is turned off. Then
connect a freshwater source to the fresh water port either as part of
the engine, or available as an attachment on the stern drive depending
on the engine manufacturer. Turn on the freshwater source and turn
on your engine. Let the engine run at idle until it reaches normal
operating temperature, then shut down the engine, disconnect the
hose, and reinstall the cap. Your engine should be fl ushed after each
trip.
To inspect your water pick-up feed, locate the screens on your stern
drive unit and remove the debris lodged in the screen. Smaller debris
can make its way all the way up to the water pump impeller and build
up there, causing malfunction.
To inspect your water pump impeller, ensure
the engine is turned off before locating the
water pump housing. Remove the housing
to get access to the impeller. Inspect the
impeller for nicks, dings, and ease of turning.
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