Won't find any anode located under the water pump housing, there's a highly corrosion going there, pics speaks for themselves. Is it a fresh or salt water motor use ? I find that if wanting to long live the lower unit to happen, must remove it from time to time, clean everything to an impeccable condition, once done brush a medium coat of marine grease under the WP housing area and the whole extension of the WP's surounding. The grease will protect those areas well against rust, corrosion, salt, crap, marine growth build ups....
Happy Boating
