Johnson Pump Water Pump Service Kits are developed and manufactured for maximum flow and long life. With a genuine spare impeller, you can also be sure that you are getting the quality required by engine manufacturers and professionals.• With Timing Belt: No• With Balance Shaft Belt: No• With Balance Shaft Tensioner: No Stable Pressure Delivery Over Time Significantly Longer Service Life Excellent Self-Priming Capability | Water Pump Impeller Kit