1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 32Get this manual
MAINTENANCEfTUNE UP Engine 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 (if applicable) 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 intemally)Periodic inspection and cleaning of this screen is required for proper cooling performanceDo not enlarge the orifice or decrease in performance will result
Exhaust Pipe
Loosen clamp connecting hose to fitting and remove lineUsing deep well 916" socket or flare nut wrench, remove fitting from exhaust pipeInspect fitting for debris or restriction and clean if necessaryInspect and clean orifice and screenApply pipe thread sealant to threads of fitting and re-installTighten securelyRe-install air bypass hose and tighten clamp Orifice Size: