I replaced the one on Aztec and it was about £25 DIY.
On a Seal 28 you take off the prop, undo the 2 bolts of the outer bearing, then use stiltsons to unscrew the bearing housing from the "deadwood" and sterntube. There were grub screws holding the bearing into the housing. Knock out the old bearing, press in the new. Clean out the debris of the old sealant. Screw the housing back with plenty of mastic, and align bolt holes (I believe it is best to try and leave the last 1/8 - 1/4 turn slack), leave mastic to go off, then replace and tighten the bolts, bedded in mastic, and grub screws.
It looks like John has sold Foca, where will Foca be sailing now? Please ask Leonie to be careful how she pronounces the name when calling on the radio.[;)]
Mike Edwards
Seal 28 "Aztec"
Mike Edwards
Seal 28 "Aztec"