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Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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Tan now my tach is intermittent on 1995 mercury 60 hp

Customer Question

Tan now my tach is intermittent on 1995 mercury 60 hp outboard
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. If the tach is intermittent this is either loose connections,bad tach or failing rectifier/regulator.

We need to start with checking the connections on the back of the tach Make sure they wires are all tight. If good then we need to check the charging system. Check battery voltage before starting the engine, then check the voltage at the battery with engine running at 1500 rpms. Is the voltage greater when running than engine off? The maximum should be 14.5 volts. The minimum should be 13.3. Post back with findings.

Customer: replied 1 year ago.
thanks it will take me a few days to get back to the boat that's where I start Thanks Tan
Expert:  Tan replied 1 year ago.

Ok That's fine. I'll be here.

Your welcome.

Customer: replied 1 year ago.
oh and should I use a reg. battery it is hooked up to a deep cycle was that way when I got it a few weeks ago
the engine that is
Expert:  Tan replied 1 year ago.

Yes. The engine should be connected to a standard cranking battery.

Customer: replied 1 year ago.
ok thanks I will get one take with me
Customer: replied 1 year ago.
what size battery
Expert:  Tan replied 1 year ago.

You need a group 24 and a minimum of 650 cold cranking amps.

Customer: replied 1 year ago.
thanks
Expert:  Tan replied 1 year ago.

Your welcome.