Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 04-09-2016, 21:47   #1
Registered User

Join Date: Dec 2006
Posts: 62
Isolated engine

I'm now running my engine above earth. I have a steel boat and electrolysis 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 (cost $150).
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.
Cheers, Jim
jimthom is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Is AIS isolated or linked? Chrisgo Marine Electronics 47 03-10-2015 15:18
DC Negative Grounding to grounding plate - Isolated shaft Thistle1969 Electrical: Batteries, Generators & Solar 17 27-09-2015 04:51
Testing for isolated alternator? heintje23 Electrical: Batteries, Generators & Solar 6 18-05-2014 10:31
Isolated Electrical System ? SabreKai Electrical: Batteries, Generators & Solar 3 09-07-2011 01:55
SSB Whip Antenna Versus Isolated Backstay Camelot Marine Electronics 30 04-12-2010 08:12

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:41.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.