Anti - fowling painting of volvo penta stern drives

[alan ber]

Boat is a 30 Footer Stern Drive Cruiser
TWIN - Volvo Penta SX duo prop drives
Presently in/out stored outside in a cradle . Moving into a wet slip , Salt water , new marina
Always a concern, stern drives in salt.
Since job will take most of week , ,bottom never painted , ruffing & barrier paint , tuff job hired marina .
Speaking with painter going over water line , I mentioned too him part of my quote was too paint drives. He was taken back , He said they never mentioned drives ,He said its a lot of work , Marina is a working marina , large vessels , no stern drives and painting of them is something they never do , Marina quoted me additional 4 hundred too paint
I am thinking , have marina take off the extra charges for drives , I will do myself . Will feel comfortable knowing anal me

If I decided too paint drives what should I do ?

Over the years I just Sanded surface , primer and spray can of Volvo Penta grey too keep drives looking clean
Never taking too bare aluminum .

What should I do NEXT ?

Hand sand the surface again best I can too remove surface loose paint
Marina is ruffing the bottom , ( not sure what they do ) will inquire ) should I have them do the same on drives ??
Once cleaned , do I leave ruff going over with anti fowling
BEST - SPRAY or HAND PAINT - How many coats
Have duo stainless drives , Anything necessary

Changing zincs , is there such a thing as over kill on zincs ,

Is there anything necessary in engine room too protect engines forming a barrier

No worries about freeing in FLA , Should I leave boat dockside plugged in ?? Nothing on except De humidor & battery charger .

Thank You

 

[alldodge]

Hey tpenfield bring your words of wisdom

So far as zinc's and the more the merrier is not the case. Need to get the protection close to 0.90V for fiber glass boat with aluminum. This is measured using a good meter and a silver/silver-chloride reference electrode.

To little and not enough voltage and to much and voltage is higher

http://assets.fluke.com/appnotes/electricalpower/B0269b_u.pdf

 

[tpenfield]

I would rough up the paint surface of the outdrives with some coarse steel wool, then rinse.

Apply the Anti-fouling paint to the outdrive with a 1" roller. Make it a heavy coat, but not so much that it runs on you. Go for a second coat. Re-coat after 4-6 months.

Aluminum anodes would be good, the more the merrier. Not sure what the anode regiment is for V-P outdrives, but go for the maximum they have. You will need to replace those every 4 months or so.

 

[Scott Danforth]

you can never have too big of a zinc or too many of them, especially in a marina environment.

scuff drive
epoxy paint
then 2-3 coats of AF paint
dont forget your props. paint them.
pull props often and re-grease the splines in the shaft