1973-74 40hp evinrude, no gears HELP!

1

1506cmo18

Petty Officer 2nd Class
Joined
Oct 6, 2009
Messages
114
Hi Guys,


I've used my motor about 10 times this season and its worked excellent until yesterday. I was running wide open then all of a sudden the motor went into neutral. Now I can hear the transmission going into gear but the propeller still spins freely. Could it be a keyway or shift dog broken? Any Ideas would help before I rip a part the lower unit!

Thks Chris
 
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Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 1973-74 40hp evinrude, no gears HELP!

I would check the shear pin first, maybe it sheared.
 
1

1506cmo18

Petty Officer 2nd Class
Joined
Oct 6, 2009
Messages
114
Re: 1973-74 40hp evinrude, no gears HELP!

Where is the shear pin?
 
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Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 1973-74 40hp evinrude, no gears HELP!

It's under the black prop nut behind the prop. Remove the cotter pin and prop nut and it will expose the shear pin. It goes through the prop hub and prop shaft.
 
1

1506cmo18

Petty Officer 2nd Class
Joined
Oct 6, 2009
Messages
114
Re: 1973-74 40hp evinrude, no gears HELP!

I took the prop off and started the motor up and the shaft doesnt even turn. Is there not a key internal or another key?

The shear pin just hold the propeller onto the shaft right?
 
D

Daviet

Fleet Admiral
Joined
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8,958
Re: 1973-74 40hp evinrude, no gears HELP!

If it's in neutral the prop shaft woun't turn. With the engine NOT running, put it in gear and see if you can turn the propshaft with your hand, if it rotates freely in gear, you have problems in the lower unit.
The shear pin connects the prop to the propshaft. If it is missing or broken the propshaft will turn but will not transfer the power to the prop.
 
1

1506cmo18

Petty Officer 2nd Class
Joined
Oct 6, 2009
Messages
114
Re: 1973-74 40hp evinrude, no gears HELP!

ya with the motor off and in gear I can still turn the propshaft


Any other pins or keys that could of broke? Any thing else?
 
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