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Berkeley Rebuild/Overhaul Video Instructions! This project is
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OVERHAUL SERVICE MANUAL
Table of Contents
- Introduction to Jet Drives.
- About Jet Drives
- Specific to Berkeley Jet Drives
- Principles of operation
- Dynamometer theory
- Schematic
- Impeller to engine matching
- Impeller curves
- Basic engine curves
- Match per operator requirement
- Variations for modified engines
- Trouble Shooting Check List
- Excess RPM's
- Debris in jet
- Something in impeller
- Wear ring clearance
- Worn or dinged impeller
- High horsepower and big loads
- Air ingestion
- Loss of speed
- Loss of engine RPM's
- Fuel
- Engine tune
- Overheat
- Bad thrust bearing
- Something wrapped in shaft
- Loss of boat speed - constant RPM's
- Added operating weight
- Reverse gate drag
- Bottom spray drag
- Warped boat bottoms
- Dirty boat bottoms
- Unusual noises
- Clatter or knocking sound
- Grinding or rubbing sound
- Squealing or high pitched rotating noise
- Hammering or thudding sensation
- Water leaks
- Packing gland
- Suction piece gaskets
- Transom adapter seal
- Bowl to adapter
- Adapter to transom
- Inspection cap/extension
- Cooling water hose
- Cable thru hull attachments
- Excess RPM's
- Overhaul of Jet Drives
- Steering and reversing mechanism
- Impeller and wear ring
- Bowl/bowl bearing
- Suction piece/packing gland
- Shaft and bearing assembly
