merc alpha 1 gen 2 outdrive lower unit

kewlkatdady

Petty Officer 2nd Class
Joined
Sep 12, 2010
Messages
188
Having an issue with the outdrive. Goes into gear fine, "idled" out of the no wake zone fine, when additional throttle was applied the motor responded but the out drive did not.

The motor rev'd and the boat didn't increase speed.

Boat ran fine last weekend, but was drug in a little mud.

Trying to get an idea on where to start the diagnosis process.

Drive serial number in my sig.

TIA
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,148
Re: merc alpha 1 gen 2 outdrive lower unit

Having an issue with the outdrive. Goes into gear fine, "idled" out of the no wake zone fine, when additional throttle was applied the motor responded but the out drive did not.

The motor rev'd and the boat didn't increase speed.

Boat ran fine last weekend, but was drug in a little mud.

Trying to get an idea on where to start the diagnosis process.

Drive serial number in my sig.

TIA

Ayuh,... Prop Hub, or motor Coupler...
 

kewlkatdady

Petty Officer 2nd Class
Joined
Sep 12, 2010
Messages
188
Re: merc alpha 1 gen 2 outdrive lower unit

yeah thats what i was afraid of...

prop hub and coupler are 2 complete different levels of repair.

If the coupler was shot, the drive wouldn't turn at all... right?

a shot prop hub, could allow a little forward movement, right?
 

kewlkatdady

Petty Officer 2nd Class
Joined
Sep 12, 2010
Messages
188
Re: merc alpha 1 gen 2 outdrive lower unit

bump... need a little direction for diagnosis.

Or is it just tear into the lower unit for visual inspection?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: merc alpha 1 gen 2 outdrive lower unit

Mark the inner hub and outer hub of the prop and take it for a test run... If the marks move (relative to each other) then you likely have a spun hub...
 

kewlkatdady

Petty Officer 2nd Class
Joined
Sep 12, 2010
Messages
188
Re: merc alpha 1 gen 2 outdrive lower unit

prop hub was the issue...
relatively simple fix.
thanks for the help.
 
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