Generac Power Systems ST20 Owner's Manual
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Generac Power Systems ST20 Owner's Manual

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Owner's Manual
Water Pump
Model CW15
www.generac.com or 1-888-436-3722
Model Number
Serial Number
Model ST20

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Summary of Contents for Generac Power Systems ST20

  • Page 1 Owner’s Manual Water Pump Model CW15 Model ST20 Model Number Serial Number www.generac.com or 1-888-436-3722...
  • Page 2 WARNING! California Proposition 65 Engine exhaust and some of its constituents are known to the state of California to cause cancer, birth defects, and other reproductive harm. WARNING! California Proposition 65 This product contains or emits chemicals known to the state of California to cause cancer, birth defects, and other reproductive harm.

  • Page 3: Table Of Contents

    Table of Contents Section 1 - Introduction 1.1 - Introduction ............1 Section 2 - Safety 2.1 - Safety Rules .

  • Page 5: Section 1 - Introduction

    Thank you for purchasing this water pump manufactured 1-888-436-3722, or on the internet at www.generac.com. by Generac Power Systems, Inc. This is a high perfor- Record model and serial number of unit on front cover for mance, air-cooled, engine-driven water pump that oper- future reference and/or service inquiries.
  • Page 6 Introduction This page intentionally left blank. Water Pump...

  • Page 7: Section 2 - Safety

    Safety Section 2 2.1 — S AFETY ULES Throughout this publication, and on tags and decals affixed to the water pump, DANGER, WARNING, CAU- TION and NOTE blocks are used to alert personnel to Hearing Protection special instructions about a particular operation that may be hazardous if performed incorrectly or carelessly.
  • Page 8 Safety 2.1.1 — Exhaust Hazards • DO NOT touch hot parts and AVOID hot exhaust gases. • Allow equipment to cool before touching. Carbon monoxide produced during use can • Keep at least five (5) feet (152 cm) of clearance on all kill in minutes.
  • Page 9 Safety • DO NOT pump chemicals or flammable liquids, such 2.1.6 — Fall Hazard as fuel, or fuel oils. • Reflective exhaust heat may damage the fuel tank, causing fire. Keep at least 5 feet of clearance on all Use of water pump can create puddles sides of the pump for adequate cooling, maintenance, and slippery surfaces.
  • Page 10 Safety 2.1.10 — Splash Hazards Risk of eye injury. Spray can splash back or propel objects. • Always wear safety goggles when using this equip- ment or in vicinity of where equipment is in use. • Before starting the water pump, be sure you are wear- ing adequate safety goggles.

  • Page 11: Section 3 - General Information

    J - Air Filter - Protects engine by filtering dust and the suction hose. debris out of the intake air. Y - Filter Basket - Used to keep debris out of the pump. Figure 3-1. ST20 Features and Controls Water Pump...
  • Page 12 General Information Figure 3-2. CW15 Features and Controls V U T Figure 3-3. Features and Controls Water Pump...

  • Page 13: Product Specifications

    General Information 3.2 — P If you are aware of any of the following symptoms, have RODUCT PECIFICATIONS your engine inspected and repaired by your servicing dealer: Model CW15K ST20K • Hard starting or stalling after starting Flow Rate (GPM / LPM) 80/303 158/598 •...
  • Page 14 General Information This page intentionally left blank. Water Pump...

  • Page 15: Section 4 - Set-Up

    Set-up Section 4 4.1 — A SSEMBLY Read entire operator’s manual before you attempt to assemble or if you have any problems with the assembly of your water pump, please call Generac Customer Ser- vice at 1-888-436-3722. When calling for assistance, please have the model and serial number from the data tag available.

  • Page 16: Add Engine Oil

    Set-up 4.2 — A NGINE 1. Place water pump on a flat, level surface. Fuel and its vapors are extremely flamma- 2. Clean area around oil fill and remove ORANGE oil fill ble and explosive. Fire or explosion can cap/dipstick. cause severe burns or death.

  • Page 17: Connect Suction And Discharge Hose

    Set-up 4.4 — C 4. Attach the filter to the suction hose by inserting the ONNECT UCTION AND barb end into the suction hose and securing with a ISCHARGE hose clamp. Then attach the filter end (Figure 4-8). 1. Attach and thread a gasket and hose barb to each of the threaded flanges using a hose nut (Figure 4-6).
  • Page 18 Set-up This page intentionally left blank. Water Pump...

  • Page 19: Section 5 - Operation

    Operation Section 5 5.1 — O PERATION If you have any problems operating your water pump, please call Generac customer service at 1-888-436-3722. 5.2 — WATER PUMP OCATION 5.2.1 — Clearances and Air Movement 5 Foot Minimum Running engine gives off carbon monoxide, an odorless, colorless, poisonous gas.

  • Page 20: Checklist Before Starting Engine

    NOTE: For the ST20K model, pumping water with sol- 5.4.2 — Starting the ST20 Water Pump ids larger than .25" can damage the pump and void 1. Move fuel valve lever (A) to ON position (Figure 5-4).

  • Page 21: How To Stop Your Water Pump

    Correct any issues before operating the pump. Improper maintenance will void the pump's warranty. Figure 5-5. Start the ST20 Water Pump NOTE: It is normal for the Water Pump to fluctuate speed while the system is self priming due to air Figure 5-6.
  • Page 22 Operation This page intentionally left blank. Water Pump...

  • Page 23: Section 6 - Maintenance

    Maintenance Section 6 6.1 — M 6.2 — M AINTENANCE ECOMMENDATIONS AINTENANCE CHEDULE Regular maintenance will improve the performance and Follow the hourly or calendar intervals, whichever occurs extend the life of the water pump. See any qualified first. More frequent service is required when operating in dealer for service.

  • Page 24: Water Pump Maintenance

    Maintenance 6.4 — Outdoor temperatures determine the proper oil viscosity WATER PUMP AINTENANCE for the engine. Use the chart to select the best viscosity for the outdoor temperature range expected. 6.4.1 — Clean Debris Daily or before use, clean accumulated debris from water pump.

  • Page 25: Service Air Cleaner

    • Used motor oil has been shown to cause skin cancer in certain laboratory animals. • Thoroughly wash exposed areas with soap and water. Figure 6-4. ST20 Oil Drain Plug KEEP OUT OF REACH OF CHILDREN. • Don’t pollute. Conserve resources. Return used oil to 6.9 —...

  • Page 26: Service Spark Plug

    Storage”. AIR CLEANER SCREW Fuel and its vapors are extremely flam- mable and explosive. Fire or explosion Figure 6-6. Service the ST20 Air Cleaner can cause severe burns or death. WHEN STORING FUEL OR EQUIPMENT WITH FUEL 6.10 — S...

  • Page 27: Other Storage Instructions

    Maintenance There is no need to drain gasoline from the engine if a 6.13 — O THER TORAGE NSTRUCTIONS fuel stabilizer is added according to instructions. Run the 1. DO NOT store fuel from one season to another engine for 2 minutes to circulate the stabilizer throughout unless it has been treated as described in Protect the fuel system.
  • Page 28 Maintenance This page intentionally left blank. Water Pump...

  • Page 29: Section 7 - Troubleshooting

    Troubleshooting Section 7 7.1 — T ROUBLESHOOTING UIDE PROBLEM CAUSE CORRECTION 1. Air leak in suction hose. 1. Make sure suction hose is double clamped at joints, clamps are tight, fittings have thread compound and are tight, with no nicks or cuts in hose. 2.
  • Page 30 Troubleshooting This page intentionally left blank. Water Pump...
  • Page 32 Part No. 0K9077 Rev A 10/02/14 Generac Power Systems, Inc. © Generac Power Systems, Inc. All rights reserved S45 W29290 Hwy. 59 Specifications are subject to change without notice. Waukesha, WI 53189 No reproduction allowed in any form without prior written 1-888-GENERAC (1-888-436-3722) consent from Generac Power Systems, Inc.

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