25hp Johnson vibration.

bobtodd23

Seaman Apprentice
Joined
Feb 6, 2010
Messages
34
The fall of '08 I started getting a vibration and a knocking sound coming from my 25hp Johnson. I took it in to have it tuned up during that following winter. The guys at the shop told me the motor was getting worn out, but that Johnsons will run that way for a long time. I used it all last summer this way. Finally decided to take it apart today, and right away found a bracket that was cracked. I'm hoping this was the source of my vibration/knock. Anyone else ever have this happen?
The motor seemed to still run alright, but the vibration was there. I'm hoping if this is the problem, that I didn't loosen anything up or throw anything out of whack running it that way all summer. I did start to get a fuel leak though...
Anyways, not sure where to start in finding a new bracket. Any input and help would be great! I can try to take better pics if needed. Thanks!
 

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bobtodd23

Seaman Apprentice
Joined
Feb 6, 2010
Messages
34
Re: 25hp Johnson vibration.

Cool...thank you for the reply. I will check it out.
 

bobtodd23

Seaman Apprentice
Joined
Feb 6, 2010
Messages
34
Re: 25hp Johnson vibration.

Is there any place on the motor where I can find out what year/model it is?? Thank you for the help!!
 

jasper60103

Commander
Joined
Sep 18, 2008
Messages
2,055
Re: 25hp Johnson vibration.

Should be a metal plate with the model/serial number on it.
Its located on the side of the transom clamp.
 

bobtodd23

Seaman Apprentice
Joined
Feb 6, 2010
Messages
34
Re: 25hp Johnson vibration.

Found it on the transom mount.....you got it, it's a 1981. Now I can order the bracket. I appreciate the help. This is a great site. I've got it bookmarked.
 

jasper60103

Commander
Joined
Sep 18, 2008
Messages
2,055
Re: 25hp Johnson vibration.

Great. Let us know how it works out. Btw, I have the same motor. Good runner.
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: 25hp Johnson vibration.

Yep, I have a 1986.:D I can't wait to put it to use after I get moved
 
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