Excessive Play In Outdrive 1974 140 Mercruiser

AEROCOOK

AEROCOOK

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This is my first I/O so please forgive my ignorance...
My stern drive seems to have excessive side to side play and I think I've located the cause. The top shaft that the outdrive pivots on when steering the boat looks like it may have a worn out bushing???
The location of this shaft and bushing is right near the trim limit switch.
Can someone please tell me if this is a common repair and what the correct name of the part is?
Any help at all would be great.
 
AEROCOOK

AEROCOOK

Master Chief Petty Officer
Joined
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Messages
872
Re: Excessive Play In Outdrive 1974 140 Mercruiser

I've just spent a very frustrating hour on the internet trying to find a parts diagram for my sterndrive and came up with nothing.
First of all, can someone please confirm that my 1974 140 I.O is in fact a type "R" ?
I think I can identify the parts that I need if I could see a parts schematic but not surprisingly, the vast majority of parts info on the internet applies to the newer style outdrives.
Can someone tell me where to find a parts list / diagram for this unit?
Thanks.
 
Bondo

Bondo

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Re: Excessive Play In Outdrive 1974 140 Mercruiser

First of all, can someone please confirm that my 1974 140 I.O is in fact a type "R" ?
Click to expand...

Nope,.... It's a Model 1,....

This is the Factory Manual for your motor,+ drive,.... It's rather Large,+ will take Along Time to download....
There's probably pictures in there.....

The Odds are, it would be easier to Update to a newer transom assembley, than to Fix your's....
Your's is probably Old enough to be the Splined shaft, instead of the newer Square shaft.....
 
AEROCOOK

AEROCOOK

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Messages
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Re: Excessive Play In Outdrive 1974 140 Mercruiser

Thank you so much for the reply. Yes it does have the splined shaft. Upgrading to a newer style would exceed my budget but all I need (I think) are a couple of bushings to get rid of the play. If the parts are available, I dont see it as being a difficult repair???
 
Bondo

Bondo

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Re: Excessive Play In Outdrive 1974 140 Mercruiser

Ayuh,...

I might be Wrong,...

But it's Usually the Splines,+ Not the Bushngs that go Bad....
 
AEROCOOK

AEROCOOK

Master Chief Petty Officer
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Messages
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Re: Excessive Play In Outdrive 1974 140 Mercruiser

Bond-o said:
Ayuh,...

I might be Wrong,...

But it's Usually the Splines,+ Not the Bushngs that go Bad....
Click to expand...

I think you're right Bond-o, I took a closer look when I got home from work and the play seems to be in the splines. I guess Ill be living with it for now.
 
Fishermark

Fishermark

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Oct 19, 2003
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5,617
Re: Excessive Play In Outdrive 1974 140 Mercruiser

You might be surprised at the price you can get a used transom assembly for. It wouldn't hurt to begin looking around. Be patient and you may be able to pick one up for very little money.
 
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