25 HP Mercury Outboard Won't Stay in Gear

qtiznip

Cadet
Joined
May 11, 2010
Messages
20
Hi,
I have a 25 HP mercury outboard that is tiller shift controlled. I believe it is a late 80's early nineties model.
When i put it into go it will go, and if I run it at a low rpm/speed it is fine. However, when i try to add more gas and speed up, it just reves up like it is in neutral or something. Then i can shift to neutral and then put it back in gear and put around, but same problem as soon as give it gas again? Any ideas on this? Thanks for the help and ideas.

Also, does anybody know what it is that is supposed to lock this gear into place?
 
Last edited:

Wingedwheel

Lieutenant Junior Grade
Joined
Jun 16, 2009
Messages
1,071
Re: 25 HP Mercury Outboard Won't Stay in Gear

See if you might have a spun prop-hub or one getting ready to go completely.
 

qtiznip

Cadet
Joined
May 11, 2010
Messages
20
Re: 25 HP Mercury Outboard Won't Stay in Gear

By that do you mean that the ridges of the hub that the prop slides onto have worn down? If so, I checked that and they are good. thanks for the reply though.
 

qtiznip

Cadet
Joined
May 11, 2010
Messages
20
Re: 25 HP Mercury Outboard Won't Stay in Gear

See if you might have a spun prop-hub or one getting ready to go completely.

I didn't know what you meant when you said this. You were right, put on a new prop and all is fixed. Thanks for the advice.
 
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