120 mercruiser outdrive lower unit install

zwolfe15

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Joined
Jun 24, 2012
Messages
8
Just had to replace the water impeller on my 120 mercruiser alpha one outdrive...now start the boat and when I shift it into forward or reverse the engine dies...guess I didn't get the shift switch back right???...anyone guide me through the steps to fix this..thanks!!
 

Bondo

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Apr 17, 2002
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70,465
Re: 120 mercruiser outdrive lower unit install

Just had to replace the water impeller on my 120 mercruiser alpha one outdrive...now start the boat and when I shift it into forward or reverse the engine dies...guess I didn't get the shift switch back right???...anyone guide me through the steps to fix this..thanks!!

Ayuh,.... Welcome Aboard,... Drop the lower again,... Make Sure Everything is in Forward,...

HOLD the lower in Forward, 'n reassemble....
(I use a bungee to hold tension on the propshaft)

The lower slipped outa gear as you were puttin' it together,.....
 

zwolfe15

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Joined
Jun 24, 2012
Messages
8
Re: 120 mercruiser outdrive lower unit install

Thanks for the info...could you tell me how to get the lower to go in forward to make sure I'm doing it right
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,092
Re: 120 mercruiser outdrive lower unit install

drop the lower, turn splined shift shaft fully clockwise while turning prop counterclockwise.
 

zwolfe15

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Joined
Jun 24, 2012
Messages
8
Re: 120 mercruiser outdrive lower unit install

Thanks for you guys help...just got it back together and hooked it up to the water hose and everything works fine..gonna take it to the lake tomorrow
 
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