lower unit disassemble

[norton64]

I recently bought a boat with a "81" 90hp Evinrude that sat in a garage for 12yrs. I run it once, but it died after about 10 minutes. how do I take the lower unit off, and replace the water pump.The heads were so hot, I couldn't touch them.(It was peeing). I guess I have to check the water (jackets)? too.I have all the bolts out,and it dropped about 1 inch and thats it.

 

[wilde1j]

Re: lower unit disassemble

Including the one under the trim tab? Did you disconnect the shift linkage (the pivot pin/bolt is typically under the carbs)?<br /><br />While you have the LU off, you might want to make sure all water passages are clear by forcing water up the water tube. If this is a SW motor, you may find a lot of salt in the water passages.

 

[norton64]

Re: lower unit disassemble

thank you. I see the linkage, but what is a trim tab?This boat was mainly used on Ky. lake.

 

[wilde1j]

Re: lower unit disassemble

Bottom of the cavitation plate. It's a round deal w/ a bolt in the middle and a tab on the periphery. You should mark it before removal, so you don't have to adjust w/o knowing where to start.<br /><br />PS: Don't rotate the shift rod during work on the water pump, or you'll have some trouble getting "L" right!