I'm now running my engine
above earth. I have a steel boat
had caused a lot of damage, so I decided to make everything above earth. I wasn't able to isolate the engine
from the hull
because I couldn't install a drive-saver on the propeller
shaft, so I had to make sure the engine wasn't being use for dc(-) return. The house wiring
was all good.
I took the following steps:
1. Replace single
wire engine sensors with two wire sensors.
2. Install a solenoid on the starter motor
3. install an isolated wire on my alternator
instead of the case being ground.
4. Check all engine wiring
to make sure the engine isn't being used as a ground.
I already had some two-wire sensors, but I replaced the temperature and oil
sensor, and the oil
pressure switch. (cost $200).
I installed a solenoid on the starter ground to the battery
through the ignition switch. (cost $100)
I had an auto electrician install an isolated ground on my alternator
Ran wires that were using the engine for a ground directly to the battery(-) .
So for my installation
the total cost was $450 but of course there was a lot of first-time mucking around to get it right