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THE POWER IS IN THE PUMP!
OWNERS MANUAL
MODELS: AT-309
TJ-309
SD-309
SD-312
MODEL: J120-AT
MODELS: 12-S & 12-TD

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Summarization of Contents

PRE OPERATION INSPECTION
Thrust Bearing Lubrication
Details on lubricating the thrust bearing and its frequency.
System Operation Checks
Verifies steering, throttle, reverse control, hand hole cover, and transom seals.
Packing Gland & Weep Hole Checks
Adjusting packing gland nuts and checking weep hole for seal integrity.
Engine Cooling Connections
Ensuring all engine cooling hose connections are tight.
GENERAL MAINTENANCE
Lubrication and Shaft Packing
Instructions for lubricating bearings and adjusting shaft packing for optimal performance.
Reverse and Steering Systems
Checks for proper function of reverse components and steering cable connections.
Operational Checks
Focuses on hand hole cover tightness and troubleshooting performance issues.
IMPELLER INFORMATION
Impeller Selection Chart (Models 12-S, 12-TD, AT-309, TJ-309, SD-309, J120-AT)
Chart to help select the correct impeller size based on horsepower and desired RPM.
Impeller Selection Chart (Model SD-312 Gen 1)
Chart for selecting impellers for SD-312 Gen 1 models based on horsepower.
Impeller Selection Chart (Model SD-312 Gen 2)
Chart for selecting impellers for SD-312 Gen 2 models based on horsepower and KW.
SAFETY
Operational Safety Practices
Covers safe practices for retrieving skiers, handling ropes, and shallow water operation.
Braking and Engine Cooling
Advises on conservative braking and warns against operating the engine out of water.
LIMITED WARRANTY
Warranty Coverage and Claims
Details American Turbine's warranty coverage, claim process, and repair/replacement policies.
Exclusions and Limitations
Specifies items and conditions not covered by the warranty and liability limits.
UNDERSTANDING YOUR BOAT
Tachometer Importance
Explains the tachometer as a key instrument for monitoring engine performance and identifying issues.
Hull Performance Issues
Discusses potential performance problems related to hull condition, overload, and drag.
Jet Unit Performance Issues
Covers common jet unit problems like blockage, impeller wear, and vane damage.
Engine Performance Issues
Identifies engine-related causes for low RPMs, such as fuel, air, and ignition problems.
Excessive Noise Causes
Explains common sources of noise in the jet drive, including cavitation and bearing issues.

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