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Inboard Engine Information

 
Sevice Intervals; Engine Maintenance and Spares
Sevice Intervals; Engine Maintenance and Spares
Items every inboard auxiliary boat should have aboard
Service Intervals; Engine Fluid Service and Types
Service Intervals; Engine Fluid Service and Types
Is it time for a change?
Wiring Diagram M12 through M50 Early
Wiring Diagram M12 through M50 Early
Which color goes where again?
Wiring Diagram M25 M25XP
Wiring Diagram M25 M25XP
Which color goes where again?
Wiring Diagram M2-12A M3-20A M4-30A M-25XPA M-35A Revision 2 2015
Wiring Diagram M2-12A M3-20A M4-30A M-25XPA M-35A Revision 2 2015
Which color goes where again?
Wiring Diagram M-25XPB M-35B 1st Edition 1.2000
Wiring Diagram M-25XPB M-35B 1st Edition 1.2000
Which color goes where again?
Maintenance Ignored by the Manual
Maintenance Ignored by the Manual
A short story of disaster barely averted!
Troubleshooting an Overheating Engine
Troubleshooting an Overheating Engine
High temp alarm light on, alarm blaring in your ears ... what next? 
The Unknown Filter
The Unknown Filter
You're not the only one whose never heard of it!
Two Versions of the Oberdorfer Pump
Two Versions of the Oberdorfer Pump
How to tell which version you have and which gasket you need.
Identifying the raw water pump on Universal engines
Identifying the raw water pump on Universal engines
How do I know which kit I need to  order?
Raw Water Pump Replacement for 5411, 5424, & M-30 Engines
Raw Water Pump Replacement for 5411, 5424, & M-30 Engines
What do I do with all of these extra parts?
Water Pump Rebuild Tips
Water Pump Rebuild Tips
 Helpful tips for a task that requires careful work. Never run the pump dry!
The Unknown Zinc
The Unknown Zinc
Without this little guy, saltwater may wreak havoc inside your heat exchanger.
Engine Warning Alarm System
Engine Warning Alarm System
Why isn't there a high temperature alarm on my pre 1990 engine?
Engine Wiring Harness Upgrade for Universal Diesel Engines
Engine Wiring Harness Upgrade for Universal Diesel Engines
Boats built until 1988 used an ammeter on the engine instrument panel. Catalina Yachts subsequently replaced the ammeter with ...
Fuel Tank Sending Unit Installation Guide
Fuel Tank Sending Unit Installation Guide
Engine Control Cable Replacement
Engine Control Cable Replacement
Tips and tricks for installing cables in the confines of the pedestal steering
Atomic 4 Transmission Control Clevis
Atomic 4 Transmission Control Clevis
How do I fit a new control cable to my Atomic 4 transmission?
Strut Installation Methods & Typical Modes of Failure
Strut Installation Methods & Typical Modes of Failure
Catalina employed different strut designs and mounting methods over the years. This article describes those designs and methods to aid in the understanding and repair of your boat.
Engine Instrument Technical Information
Engine Instrument Technical Information
Alternator Installation Instructions 105 amp
Alternator Installation Instructions 105 amp
Time to upgrade to nearly double the output?