Polaris MSX 110 Owner's Manual For Maintenance And Safety page 85

MAINTENANCE AND LUBRICATION
Cooling System Flushing (Freshwater Loop System)
CAUTION
Failure to follow the recommended flushing
procedure or flushing the engine while it's hot
could result in serious engine damage. Always
follow the recommended flushing procedures.
Always allow the engine to cool sufficiently before
flushing. Always flush the freshwater loop cooling
system any time the watercraft has been
beached with the engine running.
Flush the water passages every day the watercraft is
used in salt water or water with impurities, any time
the craft has been beached with the engine running and
before storing the craft for an extended time.
82
https://www.boat-manuals.com/
Polaris recommends the use of Flush Kit PN 2874833
when flushing the freshwater loop cooling system.
After installing the flush kit, perform the following
steps to flush the system.
1. Attach a garden hose to a faucet and to the female
coupler/hose attachment.
2. Snap the male and female coupler together.
3. Start the watercraft engine and immediately turn
on the water faucet.
4. Rev the engine intermittently for one minute to
completely flush the freshwater loop cooling
system.
5. Turn off the water faucet.
6. Allow the engine to run for no more than 10
seconds to allow all water to exit the cooling
system, then turn off the engine.
7. Press the release button on the female coupler/hose
attachment and separate it from the male coupler.