mercruiser 888 lower shift cable kit.

Riegfrghtl

Petty Officer 3rd Class
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Jul 7, 2008
Messages
77
Thanks for everyone's help in solving stalling problem in my 1972 mercruiser 888. Lower shift cable is binding up. Trying to decide if I will replace myself or pay the 125.00 and hour they charge in new jersey. Does anyone one know which cable kit will fit my 72 mercruiser 888? Thanks for your help.
 

Don S

Honorary Moderator Emeritus
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62,321
Re: mercruiser 888 lower shift cable kit.

Go to your local Mercruiser dealer and buy the new style OEM shift cable. It has a teflon coated cable and is really smooth. Since you will be buying the cable from them, if you now have the old style cable, take your bellhousing and have them tap the hole out with the special tap.

Click on the pictures below, and you will see what I mean
 

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erikgreen

Captain
Joined
Jan 8, 2007
Messages
3,105
Re: mercruiser 888 lower shift cable kit.

I haven't mentioned this yet in a thread, but I found one of those taps (1/4-18 NPSF) at mcmaster-carr for about $22. I bought the cable kit for my drive a couple weeks back, been trying to get the tap somewhere local.

Just in case you can't find them at the Marine dealers, or they only offer the wrong (tapered) one.

FYI, NPSF is different from NPS... the F is important for a tight seal.

Erik
 

Bondo

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71,130
Re: mercruiser 888 lower shift cable kit.

FYI, NPSF is different from NPS... the F is important for a tight seal.

Ayuh,... Either you Got me, or I'm having a real brain fart,.... I gotta ask,....
What's the "F" stand for,..??

I know it's 1/4" pipe, straight,...
 

erikgreen

Captain
Joined
Jan 8, 2007
Messages
3,105
Re: mercruiser 888 lower shift cable kit.

"Fuel"... IE the thread shape is such that it gives a tight seal without teflon tape...
 

Bondo

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Re: mercruiser 888 lower shift cable kit.

Ayuh,.... Thank you very much,... I learned something today..... ;)
 

WizeOne

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Mar 23, 2008
Messages
2,097
Re: mercruiser 888 lower shift cable kit.

I haven't mentioned this yet in a thread, but I found one of those taps (1/4-18 NPSF) at mcmaster-carr for about $22. I bought the cable kit for my drive a couple weeks back, been trying to get the tap somewhere local.

Just in case you can't find them at the Marine dealers, or they only offer the wrong (tapered) one.

FYI, NPSF is different from NPS... the F is important for a tight seal.

Erik

Three questions:

1) Where does that cable terminate inside the boat?

2) Is it possible to disconnect it there and force a lubricant down it, thus forstalling any binding or need to replace?

3) How laborious is it to get that bell off the back end to get it re-tapped if you need to replace the cable?
 

Don S

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Re: mercruiser 888 lower shift cable kit.

2) Is it possible to disconnect it there and force a lubricant down it, thus forstalling any binding or need to replace?

On old cables, they usually wear a groove in the outer cable and cause the cable to bind, lube doesn't help. The other problem is that the wear causes too much free play if it doesn't bind, then you can't get reverse and forward.
They were really cheap cables in the past, now in the 21st century, they are making better cables. But stuck with makeing them the same size as the older ones. That is why I always suggest getting the new OEM merc cable not the "Still Cheap" aftermarket cables, and the OEM are not that much more expensive. Like 20 or 30 bucks.
 

gene8084

Petty Officer 2nd Class
Joined
Sep 29, 2007
Messages
187
Re: mercruiser 888 lower shift cable kit.

1) Where does that cable terminate inside the boat?​
Look for the plate with two cables terminating on the back of the engine. One's to the control and the other is the lower shift cable...easy to trace.​

Never heard of trying to lubricate a failing cable.​

Replacement is not the easiest job you'll ever do. Get a manual and have a helper.​

REPLACEMENT OF SHIFT CABLE KIT
1) Remove outdrive (see help o/d r&r)
2)Tilt the bell housing up an to the far left.
3)Locate the shift cable where it exits the rear of the bell housing and cable cut it tight against the bell.
4)Grab the slide pertruding from the rear of the cable and pull it out (discard)
5)With screwdriver loosten and remove the clamp on the tip of the bellows.
6)From inside the boat , disconect the shift cable tip hold down nut and the cotter pin over the adj barrell.
7)Pull on the cable and the cable willpull thru the bellows and come free (discard)
8)The only piece left is a small piece of cable screwed into the bell, remove it with a deep 9/16 with 3/8 drive socket.
9)If the socket was on the rear (transom side) of the bell it is old style--front (drive side) it is new style.
10)since the hole goes thru either old or new can be reinstalled but the same one you took out is easier.
11)If the old cable was frozen and had to be drilled and the bell was damaged in the thread reverse the cable.
12)Clean out the bell housing and clean and lubricate the u-jounts.
13)Check the u-j bellows for holes or cracks especially if water was in the bellows when o/d was removed.
14)Chech the gimble bearing by turning it it should be free and feel no grit while turning.
15)Check the u-joints, they should moove free not stiff and have no side play.
16)REMOVE THE CLAMP AND REMOVE THE CABLE BELLOWS.
REPLACEMENT OF CABLE FROM KIT
17)Determine from (9) which cable you need and purchase the kit old-im723 or new-im519.
18)Lightly screw the threaded portion of the cable into the threaded hole in the bell housing by turning the cable(no force).
19)Slide a 9/16 deep socket over the cable to the hex fitting to tighten , If the drive will not fit use plyers to turn the socket.
20)Get the fitting as tight as possible and in new cables there can be no threads left showing between the hex and bell.
21)If the new cable will not tighten enough to use all of the threads use a tap to widen hole (do not over tap)
22) 21 is important because if the hole is too small the slide will not be able to get to reverse too big it leaks in the thread.
23)Place the Bellows on the transom plate and clamp--lubricate cable and push it thru into the boat, this takes some effort.
24)Let the bell down and check that the shift arm and roller are free to turn fully.
25)Put inside cable thru slide and anchor with set screw, remove slack but slide must be able to rotate on cable freely.
26)Use lower unit oil as lubricant no greese, and slide the cable thru the outer cable until it bottoms out.
27)Move the cable in and out and be sure it is free to slide.
28)Interlock the roller of the shift arm with the two arms on top of the slide and position so track on bottom is straight.
29)Someone must hold the cable from moving during the outdrive installation.(see o/d r&r)
30)With o/d on, screw the s.s. tip of cable down and anchor it with nut.
31)Put plastic tip over the core wire and anchor it with the sleve and two set screws.
32)Slide the cable in and out and verify that the cable is free and smooth and goes into both gears.
33)Adjust the brass barrell on the s.s.tip to have a 6" distance from the center of the hole in the tip to the barrell center.
34)The above measurement is made with the cable fully compressed(fwd gear) and the prop locked ccw.
35)The barrell is not to be moves to adjust the shifting, that adjustment is done elsewhere.
36)affix the barrell under the cotter pin and put the tip under the nut on the stud, do not tighten nut down, just locked.
37)For adjustment of shift cable and easy shift switch return to main help menu.​
 
Last edited:

Don S

Honorary Moderator Emeritus
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Messages
62,321
Re: mercruiser 888 lower shift cable kit.

Nice copy and paste Gene, but the OEM service manual explains it a lot clearer, and with pictures. Just have to download OEM manual for the drive from the links in the Adults Only sticky at the top of this forum.
 

WizeOne

Commander
Joined
Mar 23, 2008
Messages
2,097
Re: mercruiser 888 lower shift cable kit.

On old cables, they usually wear a groove in the outer cable and cause the cable to bind, lube doesn't help. The other problem is that the wear causes too much free play if it doesn't bind, then you can't get reverse and forward.
They were really cheap cables in the past, now in the 21st century, they are making better cables. But stuck with makeing them the same size as the older ones. That is why I always suggest getting the new OEM merc cable not the "Still Cheap" aftermarket cables, and the OEM are not that much more expensive. Like 20 or 30 bucks.


Gotcha on all that Don. I do not have a problem with the lower shift cable BUT it is old. I assume there must have been some lubrication in them when they were new. If so, it is undoubtedly dried out by now. I have a nifty little pump that you place it's hose over the opening end of the cable and clamp the hose on it. You place lubricant in the hose before you clamp it on to the outer cable housing then pump it up. It forces the lubricant down the cable way.

If this could help forstall a future problem with an older, dry cable, then it would be good. I used this pump to force lubricant into the throttle and shift cables of my 35 y/o OMC. They now move like a hot knife thru warm butter.
 

jtybt

Senior Chief Petty Officer
Joined
Aug 5, 2009
Messages
730
Re: mercruiser 888 lower shift cable kit.

Do you think these guys are coming up with the same diagnosis and remedy just to see you spend the extra money?

One of the other possible causes of your problem is water leaking in the shift bellows. By replacing the lower shift cable and bellows now, you may inadvertently save your boat from sinking.

Of course, you can try the cable oiler route that will work for cables IN the boat...and we can pass the popcorn and watch the fun.
 

gene8084

Petty Officer 2nd Class
Joined
Sep 29, 2007
Messages
187
Re: mercruiser 888 lower shift cable kit.

Nice copy and paste Gene, but the OEM service manual explains it a lot clearer, and with pictures. Just have to download OEM manual for the drive from the links in the Adults Only sticky at the top of this forum.

Well yes...copy paste...no claim of authorship, a picture is worth a thousand words. I just thought a "quick glance" at the enumerated steps would give an appreciation :p for the job ahead.

If it were me, I'd pull the drive and do it right now.​
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,087
Re: mercruiser 888 lower shift cable kit.

Your best bet have them do it.They will check out the whole thing once they get it off.You can do it your self but the experienced eye is what you need.J
 

Surfdancer

Seaman
Joined
Feb 19, 2008
Messages
61
Re: mercruiser 888 lower shift cable kit.

Your best bet have them do it.They will check out the whole thing once they get it off.You can do it your self but the experienced eye is what you need.J

And a couple special tools - like a modified (slotted) deep well 9/16" socket to remove the old cable, the 1/4 NPTF tap for making threads in the housing, etc.
 

jtybt

Senior Chief Petty Officer
Joined
Aug 5, 2009
Messages
730
Re: mercruiser 888 lower shift cable kit.

Surf,
I made one of those my first try. After that, I just cut the old cable. Why re-use it.
 

Surfdancer

Seaman
Joined
Feb 19, 2008
Messages
61
Re: mercruiser 888 lower shift cable kit.

Surf,
I made one of those my first try. After that, I just cut the old cable. Why re-use it.

Good point...

I had one I made to replace the original cable many moons ago...

It came in handy on my next boat as I couldn't cut it close enough to use a standard deep well socket (no Dremel with cutoff wheel).
 
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