"Dave Alonzi" wrote in message
...
Hi to all!

I have a 1999 Rinker Fiesta Vee 242 with 5.7EFI Alpha One. This is the
first
year the boat has lived in the water in Lake Michigan. i am starting to
see
my zincs wear away. They are the original zoncs and have been in salt
water.
My questions:

1. Since we are now "living" in freshwater, should i install a Mercathode
system?

I would - it will help.

2. How can I test for stray current without purchasing an expensive tester
from MerCruiser?

Use a Volt/Ohm Meter (VOM) and check for leaks between ground
connections. In other words, put the VOM on AC (or DC for that
matter) and check the ground between the drive and engine, engine
and battery - etc. That should give you an idea of where the problem
lies - it's quick and dirty but it works for finding ground loops.

3. Should I also protect my shore power system? - I leave the boat plugged
in with the refriderator and battery charger running.

Yes.

Later,

Tom