merc optimax question

[irishc]

I have a 2 yr. old 175 hp merc optimax. Has anyone on this board who has optimax engines had trouble with corosion on the starter and alternator? My mechanic opened it up a few weeks ago to give the engine the once over before I put the boat back in the water and found excessive corrosion on both parts. The starter was frozen and the alterator isn't working properly. The boat only sat idle for two months. Any feedback would be apprechiated.