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SERVICE MANUAL NUMBER 23
FIRE AND EXPLOSION HAZARD: Fuel leakage from any part of fuel system can be
a fire and explosion hazard which can cause serious bodily injury or death. Careful
periodic inspection of entire fuel system is mandatory, particularly after storage. All
fuel components including fuel tanks, whether plastic metal or fiberglass, fuel
lines, fittings, fuel filters and carburetors/fuel injection components should be in-
spected for leakage, softening, hardening, swelling or corrosion. Any sign of leak-
age or deterioration requires replacement before further engine operation.
Because of possible adverse effects of alcohol in gasoline, it is recommended that only alco-
hol-free gasoline be used where possible. If only fuel containing alcohol is available, or if
the presence of alcohol is unknown, increased inspection frequency for leaks and abnorma-
lities is required.
IMPORTANT: When operating a MerCruiser engine on gasoline containing alcohol,
storage of gasoline in the fuel tank for long periods should be avoided. Long periods
of storage, common to boats, create unique problems. In cars alcohol-blend fuels
normally are consumed before they can absorb enough moisture to cause trouble,
but boats often sit idle long enough for phase separation to take place. In addition,
internal corrosion may take place during storage if alcohol has washed protective oil
films from internal components.
Test For Alcohol Content In Gasoline
The following is an acceptable and widely used field procedure for the detection of alcohol
in gasoline. Use any small transparent bottle or tube that can be capped and is, or can be,
provided with graduations or a mark at about 1/3 full. A pencil mark on a piece of adhesive
tape may be used.
Procedure
1. Fill the container with water to the mark.
2. Add fuel almost to fill the container, leaving some air space, then cap the container. The
3. Shake container vigorously and allow it to sit upright for 3 to 5 minutes. If the volume
Power Steering Fluid
Use Quicksilver Power Trim and Steering Fluid, or automatic transmission Fluid (ATF) or
Dexron IIl.
Transmission Fluid
Velvet Drive - Dexron IIl Transmission Fluid
Hurth - Dexron IIl Transmission Fluid
Walter V-Drive - SAE 30W Engine Oil.
Index
Index
90-861326--1 MARCH 1999
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proportions of fuel to water are not critical, but there should be 2 to 3 times as much fuel
as water.
of water appears to have increased, alcohol is present. If you are not sure, there is no
need for concern. If the dividing line between water and fuel becomes cloudy, use the
middle of the cloudy band.
WARNING
MAINTENANCE
Page 1B-15
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