Originally Posted by Pete7
I did notice the same corrosion on mine, which lined up with the stainless steel bolts holding the top cover on so haven't refitted the top cover.
Had the same on my ones
design fault to increase sales
Depending on where the hole is you can repair the rams
If you unscrew the top of the ram by placing the valve block in a vice and putting a long bar through the bottom eye, you will find that unlike normal rams the outer cover is just that, a cover, the ram is really inside. You can either get this cover welded or Lancing Marine will supply it if you ask nicely
If you go down the welding route you don’t have to worry too much about the inside finish because there is no piston running on it so it doesn’t have to be smooth. This cover is there only to allow oil to the bottom of the piston which is usually done by a pipe but becase the rams are in small pockets there is no room for this on a Stern Powr.
Incidentally the rams rot because they are not bonded to the anode, you need to add bonding straps to stop this.