Last time out my boat motor overheated badly, chugged to a stop and would only re-start after cooling down. When I got it home, hooked up a hose to it and discovered it is not pumping any water. Not sure the extent of damage but am mechanically inclined. Can anyone post the procedure for tearing apart the lower unit, what to look for, what to replace etc..... ? Money is an issue, thus this is why I do not have a manual yet. Also what kind of lower unit fluids are needed?<br />Motor details 25 HP 25-SN ( 6h7)