MerCruiser Alpha I generation II shifting "issues"

CRay45DB

Petty Officer 2nd Class
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Aug 7, 2011
Messages
112
I have a 1989 Cobalt with a 350 (5.7) on an Alpha 1 unit. Boat has 200 hours, not kidding. When I had I/O's in the past, they were always VP so I am not as familiar with the characters of MC, but it define toy has a dog clutch.

Engine and boat run great, but they are two things I noticed that I need help with.

1. To take the boat into forward, I just hold the lock at the top of the shifter, and it goes in fine. If I put it back towards neutral, I can go straight into reverse, not engaging the shift lock.

2. Boat idles great, but after running it, and I put it into Neutral, the engine will idle high, 800-900. If I pull it back into reverse and then Neutral, it goes back to 610. I looked at cabling to the engine, I see the left side is my transmission, AMD speed is on the right, but did not notice anything unusual. When I have this problem, I would simply disconnect the cables at the engines, see where the engine wants them to be, and adjust the cables accordingly. Don't see how I do this is the Merc. I read a brief article, and it was long and redundant.

Need some help, Thanks
 

Bondo

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71,148
Re: MerCruiser Alpha I generation II shifting "issues"

Ayuh,... 1989, ain't a Gen.II, but an Alpha 1...

Donno what's wrong with the controller, but guessin' the neutral lock is worn...

Also just sounds like the Throttle cable needs adjustin' to preload it on the idle side...
 

CRay45DB

Petty Officer 2nd Class
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Aug 7, 2011
Messages
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Re: MerCruiser Alpha I generation II shifting "issues"

Interesting Comment of Generation II. Merc say it is. You obviously have more experience, did Gen II come out later?

Neutral lock big deal to change?
 

Don S

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62,321
Re: MerCruiser Alpha I generation II shifting "issues"

Do you have a serial number for your drive? While it may be an 89 boat, it may have been repowered completely with a newer model engine and drive.
Improperly adjusted cables from the cable can cause your problem. Normally from way too much pressure on the throttle cable linkage pushing the throttle closed The shifter tends to move the throttle at times.
 

achris

More fish than mountain goat
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May 19, 2004
Messages
27,468
Re: MerCruiser Alpha I generation II shifting "issues"

1989 - Gen II... That does not compute! Gen II didn't come out until 1991. Need a serial number or a photo. Agree with the others, worn cables (or control box) and/or out of adjustment. Is the shift interrupt switch working properly?

Chris.........
 

CRay45DB

Petty Officer 2nd Class
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Aug 7, 2011
Messages
112
Re: MerCruiser Alpha I generation II shifting "issues"

Drive serial number: OC640606

Took that off the flame arrestor cover, hard to read the drive.

Also, my kill switch does not work. Merc got rid of that and went to a whole new cabling system. Is this where a picture tells a 1000 words?
 

CRay45DB

Petty Officer 2nd Class
Joined
Aug 7, 2011
Messages
112
Re: Alpha1 shifting issues

Re: Alpha1 shifting issues

Drive serial number: OC640606

Took that off the flame arrestor

Still trying to figure out where the kill switch is. Also, after running, idle is 850, but if I turn the engine off and restart, it's back at 650

Help!
 

Bt Doctur

Supreme Mariner
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Aug 29, 2004
Messages
19,365
Re: Alpha1 shifting issues

Re: Alpha1 shifting issues

switch is usually on the stbd riser
"Also, my kill switch does not work. Merc got rid of that and went to a whole new cabling system."
News to me, Only the Bravo`s dont use the shift interupt.Pics of the engine and drive would be useful.
 

CRay45DB

Petty Officer 2nd Class
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Aug 7, 2011
Messages
112
Re: Alpha1 shifting issues

Re: Alpha1 shifting issues

Picture is coming

Thanks
 

CRay45DB

Petty Officer 2nd Class
Joined
Aug 7, 2011
Messages
112
Re: MerCruiser Alpha I generation II shifting "issues"

I have attached 20 photos. Took them with the iphone. Some are so-so, I can retake them. I really don't know what I am looking for. I have the idle problem and the shift problem. Friend of mine today told me to look at the intermediate cable.

If I have to replace the control box, what would you replace it with? E-Bay?
 
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