Engine battery need to be connected to house ground?

[SailingHarmonie]

Originally Posted by Kettlewell

I would venture to guess that on most boats there is a common ground and the engine is included, which could lead to some confusion if you ever have someone else working on the boat.

Except isolated ground is the way that every metal hulled boat is (or should be!) wired. And while isolated ground engines are not common (although they should be), they are hardly rare beasts. Anybody who makes a living working on boats should know what they are.

So anybody who gets "confused" is not a competent marine electrician. In the very unlikely case that I hired somebody to work on my boat you can be sure I'd make sure he was competent.

[boatpoker]

Originally Posted by SailingHarmonie

Except isolated ground is the way that every metal hulled boat is (or should be!) wired. And while isolated ground engines are not common (although they should be), they are hardly rare beasts. Anybody who makes a living working on boats should know what they are.

So anybody who gets "confused" is not a competent marine electrician. In the very unlikely case that I hired somebody to work on my boat you can be sure I'd make sure he was competent.

I see no where in this thread that has mentioned a metal hulled boat.

[boatpoker]

attaching pdf's on this site does not always work for me but I'll attach this Yanmar service bulletin on engine and saildrive bonding which might be of interest ... see if you can open it.

[Wotname]

BP, the Yanmar Advisory (MSA2010-007) opened OK for me and it was very informative - thanks for posting it.