what to buy little confused

[1stHound]

93 Mariner 2stk 25hp, s/n 0d215112. Looking on iboats for an impeller and trim tab (anode) confused by parts listed, will be in fresh water only as I live in Utah. Can someone help me out with the correct part numbers from iboats? Bought boat used and don't want to take it out without changing those items, already did lower unit lube change, then I noticed trim tab is corroded, Thanks

 

[GA_Boater]

From here - http://www.iboats.com/Mariner-Impellers/dm/cart_id.130545627--session_id.485082100--view_id.269210



All the Mariners from 20-30 HP use the same impeller. Can you verify the serial number? Here are some pictores of Mariner trim tabs - See any you recognize?
http://www.iboats.com/Mariner-Outbo...545627--session_id.485082100--view_id.1102594

 

[1stHound]

GA boater, the motor s/n is correct OD215112, The trim tab anode is where Im confused as the one listed says zinc, I was under the impression I need magnesium
for fresh water, when I look up magnesium tabs the numbers don't match up. The tab is just a large circle with a tiny fin toward the back of the motor, It also has a small notch facing the transom, Please keep in mind that this my first boat and I don't know a thing. But thanks to this site I am slowly learning things, that's why I checked the tab and noticed the pitting and wear

 

[GA_Boater]

Is this a trailered boat? The anode is probably fine for a trailered boat. If it's kept in the water, it becomes much more important.

Can you get a picture?

 

[1stHound]

trailered, Been trying for an hour to post some pics, no luck so far need to look around for some instructions, keeps saying I have exceeded size limit

 

[1stHound]

GA. Boater I surrender for now, still haven't figured out how to get the pics from photobucket to post on here.
The impeller seems to be #695 for sure. the tab not so sure so I will just take my best shot, I think I know which one so what the heck,roll the dice.
Im thinking the fin maybe corroded enough that it doesn't look like the right one. Thank you very much for trying to help out a new guy I really do appreciate the effort

Ken