I have a trs drive with merc trans just pulled motor and the bell housing was a little wet with fluid here is a pic,is this easy to change the shaft seal my self any input would be great

Very easy. Just remove the small cover. The hard part will be finding a seal. Most likely you won't be able to get one from merc. You can get one from some place that sells bearings and seals though. Also there's an o-ring on the cover you will want to replace. # 21 in the diagram.
http://www.perfprotech.com/store/ass....aspx#assembly

If you don't feel like shopping around locally you can get the seal and o-ring here.
http://www.kcmarinetr.com/Default.aspx

Wow that sounds great if that is your number on the link you sent i will call you tomorrow.Probley make it 2 sets the other motor will be out soon and i will do that also.
Thank You.

Not my number. That's a guy, Kirk Casey in Bellingham Wa. that has a boat repair shop. He collects, rebuilds and sells these old Merc Trans transmissions. Parts are pretty much unavailiable from mercury as these were last made around 1980.

KC MARINE is da man on that TRANS

ok i have called kc marine 2 times and i may be giving him the wrong info on what i need or the seal i order is wrong from the marine parts shop.Any other help on a exact part number and by make .for a merc trans

your other option is scaring up a pair of Borgs...

Merc is calling it the pump cover seal, however I would tell KC you need the " Input shaft seal". They'll know what you mean.
Another way is remove the seal and measure the outside diameter and mic the shaft and take the seal and measurements to a place that specializes in selling bearings and seals.