Lower Unit removal Merc 450 1962

This topic has 22 replies, 5 voices, and was last updated 2 years, 4 months ago by Samuel Phelps.

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January 15, 2020 at 10:08 pm #192161
Samuel Phelps
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US Member - 2 Years
Taking lower unit off .. I have taken the trim tab/water intake off to reveal one of the nuts holding it on . So there are 4 nuts holding it on ..
Is there anything I should know before trying to drop the unit . Remove the shift rod correct ? There is a spring around it right before it goes into the housing . Do I remove that spring ?
Just trying to know what to expect before I drop it .. I ‘d like to be able to put back on easily at some point ..LOL!
January 16, 2020 at 9:21 am #192192
dave-bernard
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US Member - 1 Year (includes $3 online payment fee)
put it in forward just me. then drop it .
January 17, 2020 at 7:42 pm #192341
Samuel Phelps
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US Member - 2 Years
Struggling with it … Any suggestions or tricks ? Doesn’t want to shake loose ..
January 17, 2020 at 11:14 pm #192361
dave-bernard
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US Member - 1 Year (includes $3 online payment fee)
that is usually a frozen shift shaft coupling. I use wedges on both sides of the shaft. MOST TIMES it comes apart.
January 18, 2020 at 7:46 am #192367
Samuel Phelps
Participant
US Member - 2 Years
Is the ss coupling located in the drive shaft housing or the the gear shaft housing ? No way to squirt some oil on it is there …
There is a screw in the DS housing located starboard side in the front . A grease plug ? Reverse lock hole maybe ? Just wondering if it could be greased up from there …
January 18, 2020 at 8:30 am #192368
dave-bernard
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US Member - 1 Year (includes $3 online payment fee)
it is about 2-3 in up in the ds housing. look down thru the opening. yes the plug is for grease to the reverse lock cams.
January 18, 2020 at 7:15 pm #192460
Samuel Phelps
Participant
US Member - 2 Years
Got it loose finally ! I stacked some washers on top of the upper mounting nuts and loosened the nuts . Thus pushing it down against Drive shaft housing ..
About 3 good turns and popped it loose …
January 18, 2020 at 11:51 pm #192485
The Boat House
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January 19, 2020 at 6:49 am #192487
billw
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US Member - 2 Years
Fantastic. I was rooting for you. That one small step is the difference between a great motor and an anchor.

Long live American manufacturing!
February 1, 2020 at 8:59 pm #193753
Samuel Phelps
Participant
US Member - 2 Years
Finally cleaned up my work bench enough to take the first look inside of the gear case . This part came apart pretty easily ..
From my uneducated eye it looks fairly clean with no corrosion so far ..
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