This repair manual by Seloc, covers all 1992-2000 Mercruiser Stern Drive Alpha, Bravo, Blackhawk gasoline engines, and all inboard transmissions.
Sequential procedures, accompanied by lots of clear photos, guide you through every job, including maintenance and all adjustments necessary for proper engine operation. This manual is perfect for do-it-yourself mechanics, professional technicians or students.
Book Excerpt: 1992-2000 Mercruiser Stern Drive Repair Manual
CARBURETED FUEL SYSTEM: TROUBLESHOOTING
In general, anything that can cause abnormal buildup can be enough to push an engine over the edge to abnormal combustion, if any of the four basic factors previously discussed are already near the danger point, for example, excessive carbon buildup raises the compression and retains heat as glowing embers.
Troubleshooting fuel systems requires the same techniques used in other areas. A thorough, systematic approach to troubleshooting will pay big rewards. Build your troubleshooting checklist, with the most likely offenders at the top.
Use your experience to adjust your list for local conditions. Everyone has been tempted to jump into the carburetor on a vague hunch. Pause a moment and review the facts when this urge occurs.
In order to accurately troubleshoot a carburetor or fuel system problem, you must first verify that the problem is fuel related. Many symptoms can have several different possible causes.
Be sure to eliminate mechanical and electrical systems as the potential fault. Carburetion is the number one cause of most engine problems but there are other possibilities.
One of the toughest tasks with a fuel system is the actual troubleshooting. Several tools are at your disposal for making this process very simple. A timing light works well for observing carburetor spray patterns.
Look for the proper amount of fuel and for proper atomization in the two fuel outlet areas (main nozzle and bypass holes). The strobe effect of the lights helps you see in detail the fuel being drawn through the throat of the carburetor.
On multiple carburetor engines, always attach the timing light to the cylinder you are observing so the strobe doesn't change the appearance of the patterns. If you need to compare two cylinders, change the timing light hookup each time you observe a different cylinder.
Subject: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 Mercruiser Stern Drive service, maintenance, repair. ISBN-10: 0893300535 | ISBN-13: 9780893300531