"Tim Fisher" wrote in message
...
Good Morning group,

I will be picking up a 1995 Sear Ray Rayder F16 in a few days. The tach
is not working properly and the gas gauge only works in the first 3
seconds of start. Does anyone know where there is a service manual pdf
online and or more information on this boat online?

I appreciate the assistance!!

Tim

There are a number of service manuals available. Local boat store should
have one for you. None for free that I aware of. They are based on the
engine though, not the manufacturer. The power plant is the only thing that
really requires a service manual but it will cover the standard electrical
systems. Just look for a merc or volvo manual that with a year range that
covers your boat. You will find an electrical chapter.

Tach is fed a signal from the ignition module. You can check for continuity
of the wire and you probably would get some kind of ac voltage on it.
Generally if the ignition is working and the wire from it to the tach is not
broken the problem is the tach. Fuel gauge is the basic sending unit with a
single wire to the gauge in the dash and +12 to the other gauge connection.
When working on boat electrical it's also important to check for good
grounds since the boat is mostly fiberglass. Unlike a car where stuff is
often grounded just because it's bolted to something metal. You could have
a ground problem in the dash that would affect both gauges. Another thing
to keep in mind on boat electrical is that they stay wet so half assed
wiring fixes often develop corrosion and poor conductivity. Crimp on
connectors don't last as long.