73 25hp johnson breaking pins

F

frustrated and confused

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we have 73 25 hp johnson outboard . i hit a rock or something it was in idle it shut the motor off and ate the prop .took the prop off and the pin was bent bad . replaced the prop and pin took it back to the water before could get to top speed it woulld break the pin again . done this 4 times took prop off and put the old one on and it bent it again. can someone please let me know what is going on?
 
F

F_R

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Re: 73 25hp johnson breaking pins

First question: Are you using the correct pin? It is supposed to be stainless steel.

Another possibility is a worn out clutch dog. That will make it come out of gear, rotate 180 degrees, and slam back into gear. The violent jolt can break the pin. ESPECIALLY if you aren't using stainless pins.

A very badly worn hole in the prop shaft or slot in the prop will be hard on the pins too, but it would have to be terribly bad to cause the problem as you describe it.
 
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boobie

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Re: 73 25hp johnson breaking pins

What type of pins are you using ?? Stainless or brass ?? Is the prop nut tight when you put it back on ??
 
F

frustrated and confused

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Re: 73 25hp johnson breaking pins

F_R said:
First question: Are you using the correct pin? It is supposed to be stainless steel.

Another possibility is a worn out clutch dog. That will make it come out of gear, rotate 180 degrees, and slam back into gear. The violent jolt can break the pin. ESPECIALLY if you aren't using stainless pins.

A very badly worn hole in the prop shaft or slot in the prop will be hard on the pins too, but it would have to be terribly bad to cause the problem as you describe it.
Click to expand...

i have tried brass and stainless both kinds broke.it had jumped out of gear
before i hit the rock but would not break the pin
 
nwcove

nwcove

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Re: 73 25hp johnson breaking pins

frustrated and confused said:
i have tried brass and stainless both kinds broke.it had jumped out of gear
before i hit the rock but would not break the pin
Click to expand...

jmo, but if it was jumping out of gear before the rock.....the rock put the last nail in the coffin for your clutch dog.
 
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boobie

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Re: 73 25hp johnson breaking pins

You didn't say anything in your first post about jumping out of gear. Agree with nwcove + 1. One should tell all when posting a problem.
 
F

frustrated and confused

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Aug 19, 2012
Messages
4
Re: 73 25hp johnson breaking pins

i thought it was just another problem since it had not broke pins before. well, i tore into the gear casing and found numerous problems. someone caulked where the o rings was . the shift rod was bent and few other things. the front and reverse gears looked good though . I am going to replace alot of the things in there including clutch dog and cradle. thanks for the advice.
 
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