Corrosione sail drive

[cptgood]

GLOBAL TECHNICAL BULLETIN Ref No: GTB2010012 Date: December 14, 2010 GTB2008-001 To: All Yanmar Marine Distributors and Dealers Subject: Sail drive anodes
Yanmar wishes to inform you about a design-change for the sail drive anode. On the sail drive models SD20, SD50 and SD50-T, Yanmar has introduced a new 2-piece aluminum
anode. Reason for this change: 1.) Improved service-ability a. Because the anode is now in two pieces, the individual units can be replaced without removing the propeller 2.) Improved protection against corrosion e a. The Aluminum anodes have a better electric potential for corrosion protection than the previous Zinc anodes, in seawater and fresh water. b. Our Stern drive ZT350 also uses Aluminum anodes as standard parts. c. For special fresh-water applications we have also prepared Magnesium anodes. The
Magnesium anodes have a very good electric potential in fresh water, but be careful, it’s too much in seawater and brackish water! The new 2-piece anode can be ordered as
196450-02490 2-piece AL-anode kit [complete with mounting plate and bolts]
196450-02500 Separate Anode AL [per piece, so please order 2 x for one drive]
196450-02440 2-piece Mg-anode kit [only anodes + bolts]
196450-02600 Separate Anode Mg [per piece, so please order 2 x for one drive]
We already implemented the new design in our production as from the following serial nr.:
SD20 From 0884-10 and up
SD50 From 0552-10 and up
SD50-T From T0001-10 and up
Please inform your network accordingly Thank you very much
P.J. Aarsen