TROUBLESHOOTING
SERVICE MANUAL NUMBER 25
Water In Engine
Important Information
IMPORTANT: First determine location of water in engine. This information can help
determine where the water came from and how it got into the engine. The three most
common problems are water on top of pistons, water in crankcase oil or water in
crankcase oil and on top of pistons.
After locating water remove all the water from the engine by removing all spark plugs and
pumping cylinders out by cranking engine over. Change oil and filter. Replace spark plugs.
Start engine and see if problem can be duplicated. If problem can be duplicated, there is
a mechanical problem. If the problem cannot be duplicated, the problem is either an
operator error or a problem that exists only under certain environmental conditions.
If water is contained to cylinder(s) only, it is usually entering through the intake system,
exhaust system, or head gasket.
If the water is contained to crankcase only, it is usually caused by a cracked or porous block,
a flooded bilge or condensation.
If the water is located in both the cylinder(s) and the crankcase, it is usually caused by water
in the cylinders getting past the rings and valves, or complete submersion.
Checking for rust in the intake manifold or exhaust manifolds is a good idea. Rust in these
areas will give clues if the water entered these areas.
Page 1C-24
90-861328--1 NOVEMBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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