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Old October 7th, 2009, 04:47 PM
DEL1 DEL1 is offline
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Default mercury 150 shift shaft

Replaced waterpump and noticed the shifter shaft moving up and down about 1 inch is this normal and is the shaft seal supposed to just lay in groove loose?
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Old October 7th, 2009, 05:57 PM
Chris1956 Chris1956 is offline
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Default Re: mercury 150 shift shaft

Is that an inline six or V6 motor? Wat year is it?

it sounds like something is amiss.
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Old October 7th, 2009, 07:32 PM
jarednr jarednr is offline
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Default Re: mercury 150 shift shaft

on my 01 150 efi the shaft in the lower unit did move up and down roughly 1 inch. i don't recall whether or not the seal was loose or not.
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Old October 8th, 2009, 12:00 PM
Jeff_G Jeff_G is offline
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Default Re: mercury 150 shift shaft

It will have some movement but 1" is a little much!
The shift shaft bushing has a rubber washer that sits on top of it, that is normal. Under the shift shaft is a C or E clip that keeps the shift shaft from coming out. That clip could be missing or came off.
Remove the lower unit from the engine. Get a shift shaft bushing tool, they are available aftermarket. Take the bushing out and install a new bushing. While removing the bushing hold down on the shift shaft!!!! DO not let it come out with the bushing.
Look at the shaft with the bushing out and see if the clip is there. If not replace the clip. Drain the gear oil and see if you can find the old one with a magnetic tool. You don't want it swimming in there.
If the shaft comes out you may have to disassemble the gearcase.
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Old October 8th, 2009, 05:44 PM
DEL1 DEL1 is offline
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Default Re: mercury 150 shift shaft

Shift shaft seems to be ok, wont lift out and grommet is on top of oil seal. Drained lu oil found nothing suspicious. Reinstalled lu and it shifts good. Thanks for replies.
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