5.7 alpha one gen 1 shifting issues

[Nscarman]

got a 5.7 merc with alpha one gen 1 that will go in gear forward but will not engage in rev. unhooked shift cable and manually can shift fwd and rev. new lower shift cable installed a year ago boat hasnt seen tge water since. im think an adjustment somewhere up top but not sure. anyone have any ideas?

 

[alldodge]

With a new shift cable, I would say something moved or not adjusted correctly, and needs the cable adjusted again

 

[achris]

Have a look at my video on that adjustment...

Chris....

 

[harringtondav]

The barrel nut on the lower shift cable is the key, Spin it forward two tuns at a time until you get REV engagement. Then tweak the nut until you get FWD and REV w/o the throttle cable moving. Barrel nut forward favors REV. Rearward favors FWD. Perfect balance is engagement in either gear with a little more controller throw before before the engine increases RPM.

 

[achris]

The barrel nut on the lower shift cable is the key, Spin it forward two tuns at a time until you get REV engagement. Then tweak the nut until you get FWD and REV w/o the throttle cable moving. Barrel nut forward favors REV. Rearward favors FWD. Perfect balance is engagement in either gear with a little more controller throw before before the engine increases RPM.

Oops, not watched my video. You're description up there ^^^ is contrary to the Merc manual, and my experience. You adjust for the correct engagement of FWD first (with the cable barrel) and then do not move it again! Then adjust the shift lever anchor point in the slot for REV engagement. No other way will work properly.

I'm aware you designed and manufactured drive trains for a living, but this is an area I have done a lot of research and study on. Any deviation from the Merc prescribed procedure, as outlined in my video, will result in the operation of the shift system being unsatisfactory. And yes, that is my experience, having been doing this and adjusting these cables, and fixing up other people's mess-ups, for more than 30 years.....

Chris.....

 

[harringtondav]

Oops, not watched my video. You're description up there ^^^ is contrary to the Merc manual, and my experience. You adjust for the correct engagement of FWD first (with the cable barrel) and then do not move it again! Then adjust the shift lever anchor point in the slot for REV engagement. No other way will work properly.

I'm aware you designed and manufactured drive trains for a living, but this is an area I have done a lot of research and study on. Any deviation from the Merc prescribed procedure, as outlined in my video, will result in the operation of the shift system being unsatisfactory. And yes, that is my experience, having been doing this and adjusting these cables, and fixing up other people's mess-ups, for more than 30 years....

Chris.....

Sorry Chris. There was no link to your video. I was (I thought) going from memory from my #14 manual. Don't carry it to the River. Believe it said to set the cable in the bottom of the slot then work the barrel nut. I'll refrain from any shift cable advice until I view your video and review the manual

 

[achris]

Sorry Chris. There was no link to your video....

When you click that, you get this....



And the video starts looking at the open throttle body on my V6



Or, you can just click this link right here -> https://www.youtube.com/watch?v=-s_tgevX2aI&feature=youtu.be

Enjoy your day on the river.

Cheers,

Chris......

 

[Nscarman]

Update- Chris i adjusted everything to the specs of your video and it goes in fwd and rev now. only issue is when you try to throttle in rev as soon as you touch the throttle it dies. I adjusted anchor pin numerous times and still same issue. engages but you cant give it any throttle.

One other thing, when out of the water on muffs it pumps water thru impeller but tried sticking lower unit in a tub of water and cant get impeller to pump any water. so im thinking may need a new impeller or am i thinking wrong?

thanks for all the help too! it is much appreciated!

 

[alldodge]

Adjust the shift interrupter for the dying

Tub may not have been seep enough to get it started, but since it did not pump any water it would be a good idea to check the impeller. Doesn't take long for an impeller running dry to burn up

 

[Nscarman]

this boat has the old style shift interrupter, didnt think it was adjustable, or if it is i dont have a clue how to. lol

 

[alldodge]

What year is it?

 

[Nscarman]

its a 1990 rinker, originally 4.3, it has a 5.7 now

 

[Nscarman]

just unplugged the interrupter switch and goes both ways now, which i know i cant run it that way, been there before! very dangerous!

 

[alldodge]

Yours isn't that old, not a Gen 2 but not that old and should have the regular setup. Use the shift cable and mark the cable in F/R and place the roller in the center of the notch when cable is in the center of movement

 

[Nscarman]

thats what i have, going back out to try it again. will update later. thank you

 

[Nscarman]

another question, which cable are we using to measure? lower shift cable or remote shift cable?

 

[alldodge]

Throttle cable, but the point is just to try to place the roller in the center of the Vee in Fwd and Rev. On a hose it should always stay in the center even when shifting back to neutral

 

[Nscarman]

its in the center in neutral, going fwd it never moves, in rev its almost like its in a bind and triggers the switch. would the lower unit not being all the way down create any binding? im starting to wonder if i messed up the lower shift cable when i put it on.

 

[harleyman1975]

Was just going to ask if it was a paid job or a DIY...

 

[Nscarman]

its a diy, im just trying to get everything fixed to get rid of it. i bought a new one and cant buy anything else til i get rid of it