2001 Polaris SLH, Virage PWC Factory Service Manual, Page 36Get this manual
Maintenance EngineContinued Exhaust Cooling OrificeScreen Cleaning
The exhaust pipe rubber hoses and muffler are cooled by injecting small amount of water through an orifice from the main cooling system into the exhaust streamThe orifice and screen should be inspected and cleaned periodically to ensure proper cooling of the exhaust muffler and connector hosesBe sure hoses are not restricted (kinked or collapsed internally)
CAUTION:
Do not enlarge the orifice or decrease in performance will result12Loosen clamp connecting hose to fitting and remove lineUsing deep well 9 16" socket or flare nut wrenchremove fitting from exhaust manifold Inspect fitting for debris or restriction and clean if necessaryInspect and clean orifice and screen