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Charles
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3722
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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Changed water pump on 2012 Mercury 90 hp. When I put lower

Customer Question

Changed water pump on 2012 Mercury 90 hp. When I put lower unit back on shifter works fine until I get about a 1/8 away from lower unit being tightened all the way up. It is then shift control is very hard to move forward or backwards
Submitted: 1 year ago.
Category: Boat
Expert:  Jason replied 1 year ago.

Hello my name is ***** ***** am I speaking with?

Sounds like the shift shaft linkage Is not lining up correctly. What gear do you have both the motor and shift control set in?

Customer: replied 1 year ago.
Have tried aligning in all three
Forward, reverse, and neutral
Customer: replied 1 year ago.
Shifter works fine until tighten up last 1/8 of a inch then acts as if it is on a bind
Expert:  Jason replied 1 year ago.

It's binding when pushing the lower unit up?

Customer: replied 1 year ago.
but why
Expert:  Jason replied 1 year ago.

Did you put to much grease on the end of the drive shaft by chance?

Customer: replied 1 year ago.
A little on splines but none on top.
Expert:  Jason replied 1 year ago.

Do you have a helper that can move the flywheel back and forth as you push up on the lower unit?

Expert:  Jason replied 1 year ago.

Also, if you look at the front of the lower unit where the shift shaft comes down, can you actually see it alighn?

Customer: replied 1 year ago.
Hard to see inside. But hand shifter will shift lower unit in and out of gear. When lower unit is about 1/8 from being completely tightened up.
Expert:  Jason replied 1 year ago.

Is there any chance your sealing coupler is upside down on the water pump, have you tried flipping that?

Expert:  Jason replied 1 year ago.

That could cause the water tube not to go all the way in.

Customer: replied 1 year ago.
Tried putting it on without water tube. Shift shaft and gear in lower unit getting in bind for some reason.
Expert:  Jason replied 1 year ago.

It is literally just an 1/8th of an inch?

Expert:  Jason replied 1 year ago.

It could also be hanging tight on the locating pins, have you tried pulling it tight with the bolts?

Customer: replied 1 year ago.
Ya can get it within a 1/8 then shifter binds up. Don't know
Expert:  Jason replied 1 year ago.

Are you able to thread any of the bolts into place?

Customer: replied 1 year ago.
I can get the lower unit all way up. Shifter works fine. It's the last1/8 of a inch is when. Hand shifter becomes very hard to move.
Expert:  Jason replied 1 year ago.

Nothing is standing out at me, I will opt out and leave this open to the other guys. If somebody else has an idea they will jump in. Good luck.

Customer: replied 1 year ago.
Thanks
Expert:  Charles replied 1 year ago.

Hello, my name is ***** ***** expert here on the site. Do you still require assistance?

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