03 merc. Lower unit

JFBarbar

Recruit
Joined
Apr 27, 2016
Messages
2
Waterpump not working and lower unit will not come off, 125 hp saltwater, all 5 nuts are off and I need help!! Please!
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,544
Are 5 nuts all there are? Are you sure? Some have just 4, a pair on either side, bolts in the engine and self locking nuts hold the sections together. Then some add one up front, easily visible. AND THEN there some with one more that is hidden under the trim tab. You have to take the trim tab bolt out from the top rear of the mid section and then look up in the hole that the trim tab was covering and wala, a hex socket bolt, your #6, or #5 if you don't have the one up front.

Otherwise you have a frozen drive shaft to crank shaft interface usually caused by no lube when the LU was removed the last time, operation in salt water, and age. That one is a bugger to get loose but you can hit the archives and find some interesting solutions......like for one, hanging the engine up side down for a week on a block and tackle.

Good luck
 
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