1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 138Get this manual
FUEL SYSTEMCARBURETION Testing Accelerator Pump Testing
On models equipped with an accelerator pump, verify proper accelerator pump operation use the following procedure:
Wear eye protection when performing this procedure1Turn engine off23Remove air intake silencer
While observing pump outlet nozzle in carburetor quickly open throttleA steady stream of fuel should be evident from each carburetor accelerator pump outlet nozzle as the throttle is openedThe pump reservoir must be full of fuel before performing this testAfter operating the accelerator pump two or three times the reservoir will be empty and fuel will no longer spray from the nozzle until the engine is started Some causes of improper pump operation are: No fuel entering chamber Worn pump cam Diaphragm damaged or swollen Check valve in nozzle stuck open or closed Outlet nozzle restricted Passages or hoses restricted