Author Topic: Shifts hard  (Read 1664 times)

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Offline Luv2win

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Shifts hard
« on: June 26, 2022, 01:36:07 PM »
Hey everyone,
my 1980 Scimitar shifts hard when going from speed to idol is this normal ?  Does the same for reverse too.
When sitting not running shifts easy and smooth .
Shifts fine just seams way to hard when running at the lake. .
thx.
1980 Scimitar

Offline carlsoncvx18

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Re: Shifts hard
« Reply #1 on: June 27, 2022, 05:38:29 AM »
Sounds to me like the shift interrupter switch is not working.  The switch is designed to kill the motor for a brief second when coming out of gear to relieve the load. 
1987 CVX18.     1968 Glastron alpha sail boat
1977 GT150
1986 CV23
1984 Intimiadator
1981 CV27
1969 V-180 fundeck

Offline Luv2win

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Re: Shifts hard
« Reply #2 on: June 27, 2022, 06:53:16 AM »
Thanks , It's working I checked it .
1980 Scimitar

Offline carlsoncvx18

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Re: Shifts hard
« Reply #3 on: June 27, 2022, 06:40:19 PM »
How did you check it?
1987 CVX18.     1968 Glastron alpha sail boat
1977 GT150
1986 CV23
1984 Intimiadator
1981 CV27
1969 V-180 fundeck

Offline Plugcheck

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Re: Shifts hard
« Reply #4 on: June 28, 2022, 09:47:15 AM »
I would agree with Jeff given the symptoms.   Shifts fine when not running eliminates linkages or controls.   Shifts hard when under power really points to the shift interrupt.  Alpha drive "dogs" don't like to uncouple when under power.   Try turning the ignition off as you transition to neutral.   Just a brief cut, not enough to require a restart.    It's either bad, mis wired, or not aligned correctly.
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Glastronjohn18

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Re: Shifts hard
« Reply #5 on: June 30, 2022, 09:52:45 PM »
As others have stated your problem most likely is the shift cutout switch.Here are the directions (right from the Mercruser Manual) for adjusting the shift cables and the shift cutout switch. I've included a clearer picture of the switch on the shift plate. Hope this helps.


















John
'80 CVX 18 - Survivor Class
'78 CVX 18
'76 V 225 -   Bal Harbor
'80 V195XL
'86 CVX 18- And '86 Makes 3

Offline Luv2win

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Re: Shifts hard
« Reply #6 on: July 01, 2022, 10:48:24 AM »
Ok Ive adjusted the cables per the manual , And put a test light on the coil with the key on. shift it into forward and the light interrupts but when going into reverse it does not.
the switch plate does not seam to travel correct  in reverse .
I'll keep working on it .

Found a leak in the reverse lock valve . I believe that's what its called. have to look for rebuild instructions .
1980 Scimitar

Offline Luv2win

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Re: Shifts hard
« Reply #7 on: July 01, 2022, 10:49:50 AM »
Thanks for the help .   :)
1980 Scimitar

Offline Glastronjohn18

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Re: Shifts hard
« Reply #8 on: July 01, 2022, 02:17:59 PM »
 On the leak Here's a post on that subject.
https://forum.cgoamn.com/index.php?topic=9108.0

To get my cutoutt switch to work properly I had to bend the arm slightly to get the switch to engage.
« Last Edit: July 01, 2022, 02:24:10 PM by Glastronjohn18 »
John
'80 CVX 18 - Survivor Class
'78 CVX 18
'76 V 225 -   Bal Harbor
'80 V195XL
'86 CVX 18- And '86 Makes 3

Offline Luv2win

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Re: Shifts hard
« Reply #9 on: July 01, 2022, 06:06:34 PM »
Thanks , I'll be taking it apart soon . I'll take lots of pictures to share.
1980 Scimitar

Offline JThomas36

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Re: Shifts hard
« Reply #10 on: July 02, 2022, 09:12:47 AM »
Thanks for sending the pics John.   I spent the day yesterday adjusting my cables and the shift interupt.  What a PIA..  my reverses lock out peed fluid the entire time I was adusting the cables..   I did take it apart the other day and saw t
My worn out Seal.. 1 of them at least.  Once I got it out and the Retaining bolt out I could not separate it any further..  I am talking about the part where you would have to keep an eye out for loosing the bearings.  I need to separate that so I can get to the 2nd seal.
I got on this morning hoping for assistance and there it is.. You guys are awesome
JT
80 CVX 18
California Special

Offline Luv2win

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Re: Shifts hard
« Reply #11 on: July 02, 2022, 10:31:10 AM »
Put some new o-rings in the reverse lock out valve today easy job.
1980 Scimitar

Offline Luv2win

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Re: Shifts hard
« Reply #12 on: July 02, 2022, 10:39:14 AM »
 :)
1980 Scimitar

Offline Luv2win

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Re: Shifts hard
« Reply #13 on: July 02, 2022, 10:40:26 AM »
 :)
1980 Scimitar

Offline Luv2win

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Re: Shifts hard
« Reply #14 on: July 02, 2022, 10:43:51 AM »
Awesome boat JT36 
1980 Scimitar

Offline JThomas36

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Re: Shifts hard
« Reply #15 on: July 02, 2022, 01:34:28 PM »
Thanks for the Pics Luv2win,  that is exactly what I need to do...  where did you get the new O rings?  I need to get them asap.  You have part # or anything.    Have been working on the CVX for about 2 years now.  Tons of Hours like everyone else on the Forum, and loving it.   This week was my 1 st launch.  Got everything the way I was hoping for but the leaking reverse lockout and final cable adjustment.  Still tough going from forward to Nuetral but reverse to nuetral works nicely.   Almost there.. 
JT
80 CVX 18
California Special

Offline 75starflight

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Re: Shifts hard
« Reply #16 on: July 02, 2022, 01:54:55 PM »
Any local hydraulic store or possibly a farm implement dealer should be able to match them up once you have them removed from the valve.
1975 v-179 starflite

Offline Luv2win

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Re: Shifts hard
« Reply #17 on: July 03, 2022, 07:38:23 AM »
Yes, you can find them any where just match them up . I changed both of them.

No more leak and I have the Shifter working perfect.
 
Cables are adjusted correctly and the Ing Interrupt switch is adjusted and working great.
A trick for the Interrupt switch ,
Adjust your cables first. the Interrupt switch last.

Take a test light clip it on the ground side of the battery then touch the point on the Neg side of the coil the light will be on with the key on.
then have someone shift it slow to forward and see if the light goes out and back on. same for reverse works great .
I just bent the lever arm until I got it working correct in forward and reverse .
Had a great day at the lake ran it pretty hard and no issues this time out.  ;D. And forgot to have my wife take some video lol.
1980 Scimitar

Offline Plugcheck

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Re: Shifts hard
« Reply #18 on: July 03, 2022, 02:20:43 PM »
Thanks for the update, glad to hear you got it all sorted out.    Always a great feeling when you solve an issue like this and realize not only did you learn something new, but also saved a fair amount of time/money not taking it to a shop.
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline demian5

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Re: Shifts hard
« Reply #19 on: July 08, 2022, 04:58:32 PM »
The arm that actuates the switch on mine doesn't seem to move enough to trigger the switch. Ideas? I may try and reseal my reverse lockout switch too at this time.


As others have stated your problem most likely is the shift cutout switch.Here are the directions (right from the Mercruser Manual) for adjusting the shift cables and the shift cutout switch. I've included a clearer picture of the switch on the shift plate. Hope this helps.








1979 Glastron Carlson CVX 16 SS I/O Mercruiser 140 "Brick House"