[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference unifix::sailing

Title:	SAILING
Notice:	Please read Note 2.* before participating in this conference
Moderator:	UNIFIX::BERENS

Created:	Wed Jul 01 1992
Last Modified:	Mon Jun 02 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2299
Total number of notes:	20724

994.0. "Grounding and Zincs" by ABE::HASKELL () Tue Sep 27 1988 15:50

    My new (20 year old) Pearson Coaster has spent 19 of her 20 years
    in fresh water. There is no corrosion on any of her metal, either
    above or below decks. She has been in salt water only 1 1/2 seasons
    in Cape Porpoise Maine.
    
    All steel shrouds, rigging, engine block etc are connected to the
    bronze through-hulls (30(engine cooling water intake, head intake
    and head overboard discharge).
    
    My concern is this;
    
    	1.	Are these through hulls sufficient for grounding during	
    		a lightening strom?
    
    	2.	What about electrolis (sp)? There are no zincs. There
    is no room on the shaft to place a zinc collar nor is there space
    on the rudder shaft. 
    
    There is no ground plate.
    
    
    Suggestions welcomed.
    
    Regards
    Paul

T.R	Title	User	Personal Name	Date	Lines
994.1	See note 952.5	TLE::PEARL	Larry Pearl (TLE::PEARL) DTN: 381-2254	`Wed Sep 28 1988 13:34`	11
	> 1. Are these through hulls sufficient for grounding during > a lightening strom? > See note 952.* for some discussion about lightning protection. 952.5 says that through-hull fittings have been blown out by a lightning strike!
994.2	you MUST have zincs	LAGUNA::MILLMAN_JA	I'D RATHER BE CRUISING	`Wed Sep 28 1988 14:51`	5
	You must repeat MUST have zincs. Either attach a zinc plate to the hul or take a zinc plate with a heavy gauge wire attached to it on one end and a clip on the other end which is attached to your grounding system. This can be taken off while sailing.
994.3	try a zinc cone on the shaft	RAINBO::BURR		`Fri Oct 07 1988 18:24`	9
	Your marine supply house can sell you a cone shaped zinc which will fit over the bolts which hold the prop on your propellor shaft. If you are going to keep the boat in salt water it is essential that you have zincs. The first thing to go will be the wiring throughout your boat, closely followed by the zinc leaching out of the bronze in your through-hulls. You won't necessarily be able to see a problem (pitting, etc.) until one of you through-hulls lets go!